Goddard Space Flight Center
Planetary Systems Labor atory

Planetary Systems Laboratory


Picture of Geronimo Villanueva

Dr. Geronimo Villanueva

Planetary Systems Laboratory
NASA/GSFC, Code 693
Greenbelt, MD 20771

Phone: (301) 286-1528

Email: Geronimo Villanueva

Geronimo Villanueva is a planetary scientist with primary interests in remote sensing of planetary atmospheres through high-resolution molecular-spectroscopy at infrared, UV, X-ray, sub-millimeter and microwave wavelengths. He is a Research Assistant Professor (Physics) at Catholic University of America, in residence at NASA-Goddard.

He was born in Mendoza, Argentina
in Apr-1978 and holds Italian and Argentinean nationalities.

CURRENT POSITION

 RESEARCH EXPERIENCE
NASA
 NASA - Goddard Space Flight Center
Planetary Systems Laboratory
2005-Present
Research Associate		 MPS Max-Planck Institute for
Solar System Research
Katlenburg-Lindau, Germany
2001-2005
Ph.D. Fellow
Post-doctoral fellow
CUA
 Catholic University of America
Physics Department
2008-Present
Reseach Assistant Professor		 DLR

 

 German Aerospace Center
SOFIA Airborne Observatory
GREAT-CTS High-resolution Spectrometer
2001-2005
Project Manager and Scientist
Uni Freiburg TU Clausthal UM
Albert Ludwig University of Freiburg
Faculty of Applied Sciences
Institut für Mikrosystemtechnik
Kiepenheuer-Institut für Sonnenphysik
Ph.D. defense in Nov-2004
 
Technische Universität Clausthal
Diplomarbeit Anerkennung
Master thesis certification
2001-2002
 
Universidad Mendoza
IEMA - Institute for Environmental Research
Microwave remote sensing
2000-2001
Research Assistant

 

Scientific Highlights


  • Lead-Investigator and collaborator of numerous observational campaigns at infrared (NASA-IRTF, Keck-2, VLT, and Gemini South), submillimeters wavelengths (HHSMT, JCMT and KP12m) and X-rays/UV (Swift).
  • Awardee. National Research Council (NRC) Fellowship. American National Academy of Sciences (NAS).
  • Principal Investigator, Co-Investigator and Collaborator of multiple awarded NASA grants.
  • Co-Investigator. NASA Mars-Scout mission proposal, Mars Organic Observer.
  • Official Reviewer of the Mars-Express, Planetary Fourier Spectrometer (MEX-PFS) Archive. European Space Agency (ESA).
  • Member of the American Astronomical Society (Division for Planetary Sciences), the European Geosciences Union, the Asia Oceania Geosciences Society, and the Sigma Xi Honor Research Society.

Refereed Publications


1.        G.L. Villanueva, M.J. Mumma, B.P. Bonev, M.A. DiSanti, E.L. Gibb, H. Bohnhardt, M. Lippi, A Sensitive Search for Deuterated Water in comet 8P/Tuttle, The Astrophysical Journal Letters (ApJL), Vol 690(1), pp. L5, 2009.

2.        G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, Discovery of multiple bands of isotopic CO2 in the prime spectral regions used when searching for CH4 and HDO on Mars, Journal of Quantitative Spectroscopy and Radiative Transfer (JQSRT), Vol. 109/6, pp. 883-894, 2008.

3.        H. Boenhardt, M.J. Mumma, G.L. Villanueva, M.A. DiSanti, B.P. Bonev, M. Lippi, H.U. Kaeufl, The unusual Volatitle Composition of the Halley-Type Comet 8P/Tuttle: Addressing the Existence of an Inner Oort Cloud, The Astrophysical Journal Letters (ApJL), Vol 683, 2008.

4.        A.M. Mandell, M.J. Mumma, G.A. Blake, B.P. Bonev, G.L. Villanueva, S. Colette, Discovery of OH in Circumstellar Disks around Young Intermediate-Mass Stars, The Astrophysical Journal Letters (ApJL), Vol 681(1), pp. L25-L28, 2008.

5.        B. P. Bonev, M.J. Mumma, Y.L. Radeva, M.A. DiSanti, E.L. Gibb, G.L. Villanueva, The Peculiar Volatile Composition of Comet 8P/Tuttle: A Contact Binary of Chemically Distinct Cometesimals?, The Astrophysical Journal Letters (ApJL), Vol 680(1), pp. L61-L64, 2008.

6.        B. P. Bonev, M.J. Mumma, K. Hideyo, K. Hitomi, G.L. Villanueva, IRCS/Subaru Observations of Water in the Inner Coma of Comet 73P-B/Schwassmann-Wachmann 3: Spatially Resolved Rotational Temperatures and Ortho-Para Ratios, Icarus, Vol. 196, pp. 241-248, 2008.

7.        G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, Identification of a New Band System of Isotopic CO2 near 3.3 µm: Implications for Remote Sensing of Biomarker Gases on Mars, Icarus, Vol 195/1 pp 34-44, 2008.

8.        M. Drahus, M. Kueppers, C. Jarchow, L. Paganini, P. Hartogh, G. L. Villanueva, Submillimeter Monitoring of the HCN Molecule in Fragment C of the Split Comet 73P/Schwassmann-Wachmann 3, Icarus, submitted, 2007.

9.        K. Magee-Sauer, M.J. Mumma, M.A. DiSanti, N. Dello Russo, E.L. Gibb, B.P. Bonev, G.L. Villanueva, The Organic Composition of Comet C/2001 A2 (LINEAR): I. Evidence for an Unusual Organic Chemistry, Icarus, Volume 194, Issue 1, p. 347-356, 2008.

10.    B.P. Bonev, M.J. Mumma, G.L. Villanueva, M.A. DiSanti, R.S. Ellis, K. Magee-Sauer, N. Dello Russo, A search for variation in the H2O ortho-para ratio and rotational temperature in the inner coma of comet C/2004 Q2 (Machholz), The Astrophysical Journal (ApJ), Vol 661, L97-100, 2007.

11.    M.A. DiSanti, W.M. Anderson, G.L. Villanueva, B.P. Bonev, K. Magee-Sauer, E.L. Gibb, M.J. Mumma, Depleted Carbon Monoxide in fragment C of the Jupiter-Family-Comet 73P/Schwassmann-Wachmann 3, The Astrophysical Journal (ApJ), Vol 661, L101-104, 2007.

12.    M.A. DiSanti, G.L. Villanueva, B.P. Bonev, K. Magee-Sauer, J.E. Lyke, M.J. Mumma, Temporal evolution of parent volatiles and dust in Comet 9P/Tempel 1 resulting from the Deep Impact experiment, Icarus, Volume 191, Issue 2, p. 481-493, 2007.

13.    G.L. Villanueva, B.P. Bonev, M.J. Mumma, K. Magee-Sauer, M.A. DiSanti, C. Salyk, G.A. Blake, The Volatile Composition of the Split Ecliptic comet 73P/Schwassmann-Wachmann 3: A Comparison of Fragments C and B, The Astrophysical Journal (ApJ), Vol 650, Issue 1, pp L87-L90, 2006.

14.    M.A. DiSanti, B.P. Bonev, K. Magee-Sauer, N. Dello Russo, M.J. Mumma, D.C. Reuter, G.L. Villanueva, Detection of Formaldehyde Emission in Comet C/2002 T7 (LINEAR) at Infrared Wavelengths: Line-by-Line Validation of Modeled Fluorescent Intensities, The Astrophysical Journal (ApJ), Vol 650, Issue 1, pp 470-483, 2006.

15.    M. J. Mumma, M. A. DiSanti, K. Magee-Sauer, B. P. Bonev, G. L. Villanueva, H. Kawakita, N. Dello Russo, E. L. Gibb, G. A. Blake, J. E. Lyke, R. D. Campbell, J. Aycock, A. Conrad, G. M. Hill, Parent Volatiles in Comet 9P/Tempel 1: Before and After Impact, Science, Vol. 310, Issue 5746, pp. 270-274, 2005.

16.    K. J. Meech, et al. (G.L. Villanueva), Deep Impact: Observations from a Worldwide Earth-Based Campaign, Science, Vol. 310, Issue 5746, pp. 265-269, 2005.

17.    P. Hartogh, A. S. Medvedev, T. Kuroda, R. Saito, G. L. Villanueva, A. G. Feofilov, A. Kutepov, U. Berger, Description and climatology of a new general circulation model of the Martian atmosphere, Journal of Geophysical Research (JGR), Vol. 110, Issue E11, CiteID E11008, 2005.

18.    K. Jockers, S. Szutowicz, G. L. Villanueva, N. Kiselev, T. Bonev, P. Hartogh, Gas and dust in Comet 2P/Encke observed in the visual and submillimeter wavelength ranges, Kinematics and Physics of Celestial Bodies, v. 5, p. 458-464, 2005.

19.    G. L. Villanueva, P. Hartogh, L. Reindl, A digital dispersive matching network for SAW devices in Chirp Transform Spectrometers, IEEE Transactions on Microwave Theory and Techniques, Vol. 54, Issue 4-1, pp. 1415-1424, 2006.

20.    G. L. Villanueva, P. Hartogh, The High Resolution Spectrometer for the SOFIA-GREAT Instrument, Experimental Astronomy (EA), Kluwer Academic Publishers, Vol. 18, Issue 1-3, pp. 77-91, 2004.

21.    G. L. Villanueva, The High Resolution Spectrometer for SOFIA-GREAT: Instrumentation, Atmospheric Modeling and Observations, PhD thesis, Copernicus Verlag, ISBN 3-936586-34-9, 2004.

22.    R. Gusten, I. Camara, P. Hartogh, H.-W. Hubers, U. Graf, K. Jacobs, C. Kasemann, H.-P. Roser, R. Schieder, G. Schnieder, O. Siebertz, J. Stutzki, G. L. Villanueva, A. Wagner, P. van der Wal, and A. Wunsch, GREAT: The German Receiver for Astronomy at Terahertz Frequencies, SPIE, vol. 4857, pp. 56–61, 2003.

 

Proceedings, Circulars and Conference Contributions


1.        G. L. Villanueva, M. J. Mumma, R. E. Novak, T. Hewagama, B. P. Bonev, M. D. DiSanti, Mapping the D/H of Water on Mars Using High-Resolution Spectroscopy, Mars Atmosphere: Modeling and Observations Conference, #9101, 2008.

2.        M. J. Mumma, G. L. Villanueva, R. E. Novak, T. Hewagama, B. P. Bonev, M. A. DiSanti, M. D. Smith, Absolute Measurements Of Methane On Mars: The Current Status, Mars Atmosphere: Modeling and Observations Conference, #9099, 2008.

3.        R. E. Novak, M. J. Mumma, G. L. Villanueva, B. P. Bonev, Maps Of The O2(1Δ) Emission During The Mars Pre-aphelion Season, Mars Atmosphere: Modeling and Observations Conference, #9107, 2008.

4.        G. L. Villanueva, M. J. Mumma, , R. E. Novak, T. Hewagama, B. P. Bonev, M. A. DiSanti, The First Map of D/H In MarsÕ Water, 40th Division of Planetary Sciences (DPS) meeting, #6.03, 2008.

5.        D. Bodewits, G. L. Villanueva, M. J. Mumma, W. Landsman, S. M. Immler, Swift UV Observations of the Evolution of Comet 8p/Tuttle, 40th Division of Planetary Sciences (DPS) meeting, #5.05, 2008.

6.        Y. L. Radeva, M. J. Mumma, B. P. Bonev, M. A. DiSanti, G. L. Villanueva, K. P. Magee-Sauer, E. L. Gibb, H. A. Weaver, The Depleted Organic Composition of Comet C/2000 WM1 (LINEAR) and the Search for Heterogeneity in the Cometary Nucleus, 40th Division of Planetary Sciences (DPS) meeting, #16.27, 2008.

7.        K. P. Magee-Sauer, G. L. Villanueva, M. J. Mumma, B. P. Bonev, M. A. DiSanti, N. Dello-Russo, M. Lippi, E. L. Gibb, Re-analysis of the v1 of NH3 in C/2002 LINEAR T7 Using CSHELL at the NASA IRTF, 40th Division of Planetary Sciences (DPS) meeting, #16.23, 2008.

8.        R. E. Novak, M. J. Mumma, G. L. Villanueva, T. Hewagama, P. Sanstead, 2-D Maps Of The O2(1Δ) Emission During The Mars Pre-aphelion Season, 40th Division of Planetary Sciences (DPS) meeting, #6.07, 2008.

9.        M. J. Mumma, G. L. Villanueva, R. E. Novak, T. Hewagama, B. P. Bonev, M. A. DiSanti, M. D. Smith, Absolute Measurements Of Methane On Mars: The Current Status, 40th Division of Planetary Sciences (DPS) meeting, #6.05, 2008.

10.    M. A. DiSanti, M. J. Mumma, G. L. Villanueva, M. Lippi, G. A. Blake, B. P. Bonev, Y. L. Radeva, C. Salyk, H. Boehnhardt, E. L. Gibb, K. Magee-Sauer, The Volatile Composition of Comet Boattini (C/2007 W1) from Infrared Spectroscopy, 40th Division of Planetary Sciences (DPS) meeting, #5.07, 2008.

11.    D. Bodewits, G. L. Villanueva, M. J. Mumma, G. V. Brown, S. Porter, W. Landsman, Swift Observations Of Cometary X-ray And UV Emission, American Astronomical Society, HEAD meeting #10, #19.07, 2008.

12.    G. L. Villanueva, M. J. Mumma, B. P. Bonev, M. A. DiSanti, E. L. Gibb, H. Boehnhardt and M. Lippi, Measurement of D/H in comet 8P/Tuttle: On the Origin of EarthÕs Water, ACM (Asteroids, Comets, Meteors), Abstract #8373, Baltimore, 2008.

13.    M. J. Mumma, M. A. DiSanti, B. P., Bonev, G. L. Villanueva, K. Magee-Sauer, and E. L. Gibb, An Emerging Taxonmy for Comets based on Organic Parent Volatitles, ACM (Asteroids, Comets, Meteors), Abstract #8282, Baltimore, 2008.

14.    M. A. DiSanti, M. J. Mumma, B. P. Bonev, G. L. Villanueva, Y. L. Radeva, W. M. Anderson, K. Magee-Sauer, E. L. Gibb, A Comparison of Oxidized Carbon Abundances among Comets, ACM (Asteroids, Comets, Meteors), Abstract #8275, Baltimore, 2008.

15.    B. P. Bonev, M. J. Mumma, Y. L. Radeva, M. A. DiSanti, G. L. Villanueva, Spin Temperature of H2O in Comets — A Cosmogonic Indicator?, ACM (Asteroids, Comets, Meteors), Abstract #8312, Baltimore, 2008.

16.    D. Bodewits, G.L. Villanueva, M.J. Mumma, W. Landsman, S.M. Immler, F.S. Porter, G.V. Brown, SWIFT Observations of Cometary X-Ray and UV Emission, ACM (Asteroids, Comets, Meteors), Abstract #8377, Baltimore, 2008.

17.    Y. L. Radeva, B. P. Bonev, M. J. Mumma, M. A. DiSanti, G. L. Villanueva, K. Magee-Sauer, E. L. Gibb, H. A. Weaver, The Depleted Organic Composition of Comet C/2000 WM1 (LINEAR) as revealed through Infrared Spectroscopy, ACM (Asteroids, Comets, Meteors), Abstract #8294, Baltimore, 2008.

18.    K. Magee-Sauer, M. J. Mumma, B. P. Bonev, Y. L. Radeva, M.A. DiSanti, G. L. Villanueva, N. Dello Russo, E. L. Gibb, W. M. Anderson, NH3 infrared emission in comets, ACM (Asteroids, Comets, Meteors), Abstract #8054, Baltimore, 2008.

19.    M. Lippi, M. J. Mumma, G. L. Villanueva, M. A. Di Santi, B. Bonev, H. Boehnhardt, The Volatitle Composition of the Periodic Comet 8P/Tuttle as Measured with CRIRES at ESOÕs VLT observatory, ACM (Asteroids, Comets, Meteors), Abstract #8197, Baltimore, 2008.

20.    E. L. Gibb, B. P. Bonev, M. J. Mumma, M. A. DiSanti, G.L. Villanueva, Characterizing CH4 Spin Temperature, Abundance, and CH3D/CH4 ratio in Comets: The Case of C/2004 Q2, ACM (Asteroids, Comets, Meteors), Abstract #8314, Baltimore, 2008.

21.    W.M. Anderson, M.A. DiSanti, M.J. Mumma, B.P. Bonev, G.L. Villanueva, N. Dello Russo, K. Magee-Sauer, E. L. Gibb, The Chemistry of Oxidized Carbon in Comet C/2002 T7 (LINEAR) revealed through Infrared Spectroscopy, ACM (Asteroids, Comets, Meteors), Abstract #8387, Baltimore, 2008.

22.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, An Extensive Search For Biomarker Gases in the Martian Atmosphere Using Powerful Infrared Telescopes, AbSciCon (Astrobiology Science Conference), Santa Clara, California, April 2008.

23.    M.J. Mumma, G.L. Villanueva, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, M.D. Smith, Absolute Measurements of Methane on Mars: The current Status, AbSciCon (Astrobiology Science Conference), Santa Clara, California, April 2008.

24.    M.A. DiSanti, B.P. Bonev, E.L. Gibb, K. Magee-Sauer, M.J. Mumma, G.L. Villanueva, Comparing Abundances of Oxidized Carbon Among Comets, AbSciCon (Astrobiology Science Conference), Santa Clara, California, April 2008.

25.    Y. Radeva, B.P. Bonev, M.J. Mumma, M.A. DiSanti, G.L.Villanueva, K. Magee-Sauer, E.L. Gibb, N. Dello Russo, H.A. Weaver, The Depleted Organic Composition of Comet C/2000 WM1 (LINEAR) and its Contribution to Determining the Source of Water and Prebiotic Organics on the Young Earth, AbSciCon (Astrobiology Science Conference), Santa Clara, California, April 2008.

26.    A. Mandell, M.J. Mumma, G.A. Blake, G. L. Villanueva, B. Bonev, S. Sigurdsson, Constraining the Nature of Warm OH in the Planet-Forming Regions of Gas-Rich Circumstellar, AbSciCon (Astrobiology Science Conference), Santa Clara, California, April 2008.

27.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, Mapping of Deuterated Water (HDO) on Mars, Mars Water Cycle Workshop, Paris, France, April 2008.

28.    G.L. Villanueva, A Future in Aerospace, Invited Speaker at the Higher Colleges of Technology, Ras al-Khaimah, United Arab Emirates (UAE), December 2007.

29.    G.L. Villanueva, Detection and Mapping of Methane on Mars, Invited Speaker at the Center for Astrobiology at the University of Colorado, Boulder, USA, February 2008.

30.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, An Extensive Search for Biomarker Gases in the Martian Atmosphere, Seminar at the Observatory of Paris-Meudon, Paris, France, November 2007.

31.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, An Extensive Search for Biomarker Gases in the Martian Atmosphere, European Mars Science and Exploration Conference, European Space Agency (ESA-ESTEC), Noorwidjk, Netherlands, November 2007.

32.    M.J. Mumma, G.L. Villanueva, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, Absolute Measurements of Methane on Mars, European Mars Science and Exploration Conference, European Space Agency (ESA-ESTEC), Noorwidjk, Netherlands, November 2007.

33.    G.L. Villanueva, A future in Aerospace, Iona College Career Seminar, New York, November 2007.

34.    C. Salyk, G.A. Blake, M.J. Mumma, B.P. Bonev, M.A. DiSanti, G.L. Villanueva, Y. Radeva, K. Magee-Sauer, E.L. Gibb, Comet 17P/Holmes, International Astronomical Union (IAU) Circular, 8890, 1 (Novembe/2007).

35.    C. Rahon, R. E. Novak, M. J. Mumma, M. A. DiSanti, G. Villanueva, C. Sanstead, M. Varona, Infrared Mapping of Carbon Monoxide on Mars, 39th Division of Planetary Sciences (DPS) meeting, 24.10, Orlando, Florida, USA, October 2007.

36.    Y. L. Radeva, B. P. Bonev, M. J. Mumma, M. A. DiSanti, G. L. Villanueva, K. Magee-Sauer, E. L. Gibb, N. Dello Russo, H. A. Weaver, The Depleted Organic Composition of Comet C/2000 WM1 (LINEAR) as seen at Infrared Wavelengths, 39th Division of Planetary Sciences (DPS) meeting, 48.05, Orlando, Florida, USA, October 2007.

37.    M. Drahus, M. Kueppers, C. Jarchow, L. Paganini, P. Hartogh, G. L. Villanueva, Submillimeter Monitoring of the HCN Molecule in Fragment C of the Split Comet 73P/Schwassmann-Wachmann 3, 39th Division of Planetary Sciences (DPS) meeting, 48.07, Orlando, Florida, USA, October 2007.

38.    Karen P. Magee-Sauer, M. J. Mumma, B. P. Bonev, Y. L. Radeva, M. A. DiSanti, G. L. Villanueva, N. Dello Russo, E. L. Gibb, W. M. Anderson, A Retrospective Search For NH3 Infrared Emission In Comets, And Its Relation To NH2, 39th Division of Planetary Sciences (DPS) meeting, 53.16, Orlando, Florida, USA, October 2007.

39.    B. Bonev, M. J. Mumma, M. A. DiSanti, G. L. Villanueva, R. S. Ellis, D. P. Stark, K. Magee-Sauer, E. L. Gibb, C. Rahon, 39th Division of Planetary Sciences (DPS) meeting, 53.12, Orlando, Florida, USA, October 2007.

40.    E. L. Gibb, B. P. Bonev, M. M. Mumma, M. A. DiSanti, K. Magee-Sauer, G. Villanueva, A Study Of Methane In Comets C/2002 T7 (LINEAR) And C/2001 Q4 (NEAT), 39th Division of Planetary Sciences (DPS) meeting, 53.15, Orlando, Florida, USA, October 2007.

41.    R. E. Novak, M. J. Mumma, G. Villanueva, M. A. DiSanti, B. Bonev, C. L. Rahon, C. C. Sanstead, Seasonal Mapping of [HDO]/[H2O] in the Martian Atmosphere, 39th Division of Planetary Sciences (DPS) meeting, 24.08, Orlando, Florida, USA, October 2007.

42.    C. Sanstead, W. Pientka, R. E. Novak, M. J. Mumma, G. Villanueva, C. Rahon, 2-D Maps Of The O2-singlet-delta Emission During The Mars Aphelion Season, 39th Division of Planetary Sciences (DPS) meeting, 24.07, Orlando, Florida, USA, October 2007.

43.    G. L. Villanueva, M. J. Mumma, R. E. Novak, T. Hewagama, B. P. Bonev, M. A. DiSanti, A Sensitive Search for Multiple Biomarker Gases on Mars, and Discovery of a New Band of Isotopic CO2 in the Prime Search Region for Hydrocarbons, 39th Division of Planetary Sciences (DPS) meeting, 31.01, Orlando, Florida, USA, October 2007.

44.    M. J. Mumma, G. L. Villanueva, R. E. Novak, T. Hewagama, B. P. Bonev, M. A. DiSanti, M. D. Smith, Absolute Measurements of Methane on Mars: The Current Status, 39th Division of Planetary Sciences (DPS) meeting, 31.02, Orlando, Florida, USA, October 2007.

45.    M. A. DiSanti, M. J. Mumma, B. P. Bonev, G. L. Villanueva, K. Magee-Sauer, E. L. Gibb, W. M. Anderson, Y. L. Radeva, A Comparison of Oxidized Carbon Abundances among Comets, 39th Division of Planetary Sciences (DPS) meeting, 48.03, Orlando, Florida, USA, October 2007.

46.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, A sensitive search for life signatures in the Martian atmosphere, Bioastronomy Conference, San Juan, Puerto Rico, July 2007.

47.    G.L. Villanueva, The Search for Life at Infrared Wavelengths (invited review talk), Astrobiology Graduate Conference (AbGradCon), San Juan, Puerto Rico, July 2007.

48.    R. E. Novak, M. J. Mumma, G.L. Villanueva, B.P. Bonev, M.A. DiSanti, Mapping of HDO and H2O in the Martian Atmosphere, 7th International Conference on Mars, No. 1353, p.3283, Pasadena, California, July 2007.

49.    P. Mahaffy, G.L. Villanueva, J. Eigenbrode, Is Mars Alive?, About Goddard General Seminar, NASA-Goddard Space Flight Center, June 2007.

50.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, A sensitive search for life signatures in the Martian atmosphere, Seminar at the Physics Department of the Catholic University, Washington DC, April 2007.

51.    G.L. Villanueva, M.J. Mumma, R.E. Novak, T. Hewagama, B.P. Bonev, M.A. DiSanti, The Infrared Signatures of biomarkers in planetary bodies, Observing Planetary System – ESO Workshop, Santiago de Chile, March 2007.

52.    G.L. Villanueva, M.J. Mumma, B.P. Bonev, M. Drahus, L. Paganini, M. Kueppers, M.A. DiSanti, K. Magee-Sauer, P. Hartogh, C. Jarchow, S. Milam, L.M. Ziurys, Submillimeter Molecular Observations Of The Split Ecliptic Comet 73p/schwassman-wachmann 3, DPS meeting #38, #03.07, 2006.

53.    M. J. Mumma, G.L. Villanueva, B.P. Bonev, M.A. DiSanti, K. Magee-Sauer, C. Salyk, G.A. Blake, The Unusual Organic Volatile Composition of Comet 73P/Schwassmann-Wachmann 3: Is SW3 the Third Member of a Distinct Taxonomic Group?, DPS meeting #38, #03.08, 2006.

54.    B.P. Bonev, G.L. Villanueva, M.A. DiSanti, M.J. Mumma, R.S. Ellis, D.P. Stark, K. Magee-Sauer, E.L. Gibb, N. Dello Russo, C. Makrides, Infrared Observations of the Bright Comet C/2004 Q2 (Machholz) - H2O, OH*, And Organic Volatile Composition, DPS meeting #38, #20.08, 2006.

55.    K. P. Magee-Sauer, J.W. Feuss, N. Dello Russo, M.A. DiSanti, B.P. Bonev, E.L. Gibb, G.L. Villanueva, W.M. Anderson, M.J. Mumma, NH3 Production In Comet C/2002 T7 LINEAR, DPS meeting #38, #29.01, 2006.

56.    M.A. DiSanti, B.P. Bonev, N. Dello Russo, K. Magee-Sauer, M.J. Mumma, D.C. Reuter, G.L. Villanueva, W.M. Anderson, E.L. Gibb, Formaldehyde Emission in Comet C/2002 T7 (LINEAR) at Infrared Wavelengths: Line-by-Line Validation of Modeled Fluorescent Intensities, DPS meeting #38, #29.02, 2006.

57.    Y.L. Radeva, B.P. Bonev, G.L. Villanueva, M.J. Mumma, M.A. DiSanti, K. Magee-Sauer, E.L. Gibb, N. Dello Russo, H.A. Weaver, The Organic Composition Of The Comet C/2000 WM1 (LINEAR) Revealed At Infrared Wavelengths, DPS meeting #38, #29.03, 2006.

58.    C.W. Bowers, M.J. Mumma, G.L. Villanueva, R.E Novak, M.A. DiSanti, D.A. Glenar, B.P. Bonev, The Mars Organics Observer: A Mars Scout Mission Concept, DPS meeting #38, #45.11, 2006.

59.    C. Makrides, G.L. Villanueva, R. Novak, M.J. Mumma, B.P. Bonev, T. Hewagama, Observations of Deuterated Water on Mars Using NIRSPEC at Keck II; Is the D/H Ratio Related to Surface Pressure and Temperature?, DPS meeting #38, #60.12, 2006.

60.    G. A. Blake, C. Salyk, B. P. Bonev, G. L. Villanueva, M. A. DiSanti, M. J. Mumma, K. Magee-Sauer, E. L. Gibb, Comet 73P/Schwassmann-Wachmann, IAU Circular #8704, 2006.

61.    G. L. Villanueva, M. J. Mumma, R. E. Novak, T. Hewagama, M. A. DiSanti, B. P. Bonev, A. M. Mandell, M. D. Smith, Infrared Survey of Atmospheric Biomarkers on Mars, Astrobiology Science Conference, Abstract #427, 2006.

62.    M. J. Mumma, M. A. DiSanti, K. Magee-Sauer, B. P. Bonev, E. L. Gibb, N. Dello Russo, G. L. Villanueva, An Emerging Taxonomy for Pre-Biotic Volatiles in Comets: Astrobiological Implications for Young Planets, Astrobiology Science Conference, Abstract #415, 2006.

63.    M. A. DiSanti, B. P. Bonev, N. Dello Russo, K. Magee-Sauer, M. J. Mumma, D. C. Reuter, G. L. Villanueva, W. M. Anderson, Formaldehyde Emission in Comet C/2002 T7 (LINEAR) at Infrared Wavelengths: Line-by-Line Validation of Modeled Fluorescent Intensities, Astrobiology Science Conference, Abstract #346, 2006.

64.    B. P. Bonev, M. A. DiSanti, M. J. Mumma, N. Dello Russo, K. Magee-Sauer, R. S. Ellis, D. P. Stark, G. L. Villanueva, Direct Infrared Detections of H2O in Comets: Implications for Studies of the Origin of Our Planetary System, Astrobiology Science Conference, Abstract #341, 2006.

65.    G. L. Villanueva, M. Kuppers, P. Hartogh, A high resolution spectroscopic chemical survey of molecular species and isotopic ratios in comet 2004 Q2, 2001 Q4 and 2002 T7, American Astronomical Society, DPS meeting #37, #11.08, 2005.

66.    M. A. DiSanti, M. J. Mumma, B. P. Bonev, N. Dello Russo, K. Magee-Sauer, G. L. Villanueva, H. Kawakita, S. Sugita, E. L. Gibb, J. Lyke, F. Chaffee, The Evolution of Gas and Dust Production in comet 9P/Tempel 1 as a Result of the Deep Impact Event, American Astronomical Society, DPS meeting #37, #11.09, 2005.

67.    R. E. Novak, M. J. Mumma, S. Lee, L. Ivanov, B. Bonev, G. L. Villanueva, Mapping of D/H and Ozone in the Martian Atmosphere near Perihelion, American Astronomical Society, DPS meeting #37, #27.02, 2005.

68.    M. J. Mumma, R. E. Novak, T. Hewagama, G. L. Villanueva, B. P. Bonev, M. A. DiSanti, M. D. Smith, N. Dello Russo, Absolute Abundance of Methane and Water on Mars: Spatial Maps, American Astronomical Society, DPS meeting #37, #27.04, 2005.

69.    N. Dello Russo, M. A. DiSanti, M. J. Mumma, B. Bonev, K. Magee-Sauer, E. L. Gibb, G. L. Villanueva, H. Kawakita, S. Sugita, J. Lyke, Water production and release in comet 9P/Tempel 1, American Astronomical Society, DPS meeting #37, #43.03, 2005.

70.    K. Magee-Sauer, M. J. Mumma, B. Bonev, M. A. DiSanti, N. Dello Russo, D. P. Stark, R. S. Ellis, G. L. Villanueva, J. Feuss, E. L. Gibb., Spectroscopy of comets 9P/Tempel 1 and C/Machholz (2004 Q2) in the 3-micron region using NIRSPEC, American Astronomical Society, DPS meeting #37, #44.05, 2005.

71.    K. Jockers, S. Szutowicz, G. L. Villanueva, T. Bonev, P. Hartogh, HCN and CN in Comet 2P/Encke: A three-dimensional view on Comet EnckeÕs outgassing, Geophysical Research Abstracts, Vol. 7, 07602, 2005

72.    M. Kuppers, G. L. Villanueva, P. Hartogh, Coma abundances in comets from sub-mm observations and clues about their formation and evolution, IAU Symposium No. 229, Asteroids, Comets, Meteors, 2005.

73.    K. Jockers, S. Szutowicz, G. L. Villanueva, T. Bonev, P. Hartogh, HCN and CN in Comet 2P/Encke: A three-dimensional view on Comet EnckeÕs outgassing, IAU Symposium No. 229, Asteroids, Comets, Meteors, 2005.

74.    M. Kuppers, P. Hartogh, G. L. Villanueva, Sub-millimeter Observations of Comets 2001 Q4 (NEAT) and 2002 T7 (LINEAR), American Astronomical Society, DPS meeting #36, #25.05, 2004.

75.    G. L. Villanueva, P. Hartogh, L. Reindl, Microwave Technologies on SOFIA's High Resolution Spetrometer, Proceedings of the 33rd European Microwave Assembly, pp. 547, 2003.

76.    Berger, U, P. Hartogh, C.-V. Meister, G. L. Villanueva, Hydrodynamic Model of the Mars Atmosphere between Near-Surface Layers and an Altitude of about 130 km, Astronomische Nachrichten, Supplementary Issue 2, Vol. 324, p.57, 2003

77.    G. L. Villanueva, P. Hartogh, C. Jarchow, The high resolution spectrometer for SOFIA, EGS - AGU - EUG Joint Assembly, Geophysical Research Abstracts, Volume 5, No. 2522, 2003

78.    Meister, C.-V, P. Hartogh, G. L. Villanueva, U. Berger, Annual behavior of the general circulation of the Martian atmosphere, EGS - AGU - EUG Joint Assembly, Geophysical Research Abstracts, Volume 5, No. 4257, 2003.

79.    C.-V. Meister, P. Hartogh, G. L. Villanueva, and U. Berger, Hydrodynamic model of the Martian atmosphere between near-surface layers and an altitude of about 130 km, MPAE Report MPAE-W-100-02-06, Max-Planck-Institut fur Aeronomie, Katlenburg-Lindau, Germany, 2002.