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Thangasamy Velusamy's Picture
Address:
Jet Propulsion Laboratory
M/S 169-506
4800 Oak Grove Drive
Pasadena, CA 91109
Phone:
818.354.6112
Fax:
818.354.8895
Email:

Thangasamy Velusamy

Education
  • B.Sc, Physics, St.John's College (Madras University), Palayamkottai, India (1961)
  • M.Sc, Physics, Madras Christian College (Madras University), Madras, India (1964)
  • Ph.D, Astronomy, University of Maryland, College Park, Md (1973)
Research Interests
  • Star and planet formation - physical and chemical structure & evolution of star-forming cores and protostellar disks
  • Observational studies of circumstellar disks and young stellar infall/outflows at radio, mm/submm wavelengths
  • High contrast imaging for direct detection of extrasolar planets - design and performance analysis of infrared nulling interferometers
  • Image reconstruction, deconvolution and spatial resolution enhancement
Professional Experience
  • Jet Propulsion Laboratory (1992-Present)
    • Principal Scientist, Astrophysics (2001-Present)
    • Research Scientist, Astrophysics (1995-2001)
    • NRC Senior Research Associate (1992-1995)
  • Tata Institute of Fundamental Research (TIFR), Bombay (1965-1992)
    • Professor & Director of Ooty Radio Observatory (1989-1992)
    • Research Associate/Reader/Associate Professor (1965-1988)
  • University of Maryland, College Park, MD
    • Research Associate (1979-1981)
    • Graduate Student & Research Assistant (1969-1973)
  • Radio Sterrenwacht Dwingeloo, The Netherlands, Visiting Scientist (Fall 1977)
  • Lawrence Livermore National Laboratory Livermore, CA, Visiting Scientist (Summer 1987 & 1989)
  • Department of Terrestrial Magnetism Carnegie Institution, Washington D.C, Visiting Scientist (Summer 1973)
Selected Awards
  • Team Award: “Center for Long Wavelength Astrophsyics Team”, 2008
  • Team Award: “HiResTeam” for developing tool for HiRes Deconvolution of Spitzer IR images, 2004
  • Senior Research Associateship, National Research Council, 1992-1995
  • Atomic Energy Commission Merit Scholarship (M.Sc. Physics), 1962-64
Selected Publications
Books
  • RAY, A. & Velusamy, T., eds, "Supernovae and Stellar Evolution," Proc. Of International Workshop, Goa, 1989, World Scientific, Singapore (1991)
Papers, Chapters, and Articles
  1. Velusamy, T., Peng, R. Li, D., Goldsmith, P.F. Langer, W.D., (2008) ”Dichotomy in the Dynamical Satuts of Massive Cores in Orion” ApJ(Lett) 688, L87
  2. Velusamy, T., Langer, W. D. (2008), “PAH and H2 emissions in the UV dominated region in NGC 2316”, AJ, 136, 602
  3. Velusamy, T., Marsh, K.A., Beichman, C.A., Backus, C.R., (2008) “HiRes Deconvolution of Spitzer IR images”, AJ 136, 197
  4. Velusamy, T., Langer, W. D.. Marsh, K.A., (2007)” Highly Collimated Jets and Wideangle Outflows in HH 46/47: New Evidence from SPITZER Infrared Images” ApJ (Letters) 668, L159
  5. Li,D.; Velusamy,T.; Goldsmith, P.F.; Langer, WilliamD.(2007) ” Massive Quiescent Cores in Orion. II. Core Mass Function”, ApJ 655,351
  6. Tinetti, Giovanna; Meadows, Victoria S.; Crisp, David; Kiang, Nancy Y.; Kahn, Brian H.; Fishbein, Evan; Velusamy, T.; Turnbull, Margaret (2006) “Detectability of Planetary Characteristics in Disk-Averaged Spectra II: Synthetic Spectra and Light-Curves of Earth”, AstrBioology, 6, 881
  7. Beichman, C. A.; Bryden, G.; Stapelfeldt, K. R.; Gautier, T. N.; Grogan, K.; Shao, M.; Velusamy, T.; Lawler, S. M.; Blaylock, M.; Rieke, G. H.; and 7 coauthors (2006) “New Debris Disks around Nearby Main-Sequence Stars: Impact on the Direct Detection of Planets”ApJ 652, 167
  8. Marsh, K A.; Velusamy. T; Ware, Brent (2006) “Point Process Algorithm: A New Bayesian Approach for Planet Signal Extraction with the Terrestrial Planet Finder-Interferometer”, AJ, 132, 1789
  9. Marsh, K. A.; Dowell, C. D.; Velusamy, T.; Grogan, K.; Beichman, C. A. (2006) “Images of the Vega Dust Ring at 350 and 450 µm: New Clues to the Trappingof Multiple-Sized Dust Particles in Planetary Resonances”, ApJ (Lett) 646, L77
  10. Lai, S-P., Velusamy, T., & Langer, W.D. (2003) "High Angular Resolution Study of the Ion and Neutral Spectra as a Probe of the Magnetic Field Structure," ApJ (Letters), 596, L239
  11. Velusamy, T., Angel. R.P., Eatchel, A., Tenerelli, D., & Woolf, N.J. (2003) "Single and Double Bracewell Nulling Interferometry in Space," in Proc. "Towards Other Earths," ESA SP-539, p631
  12. Lai, S-P., Velusamy, T., Langer, W. D., & Kuiper, T.B.H., (2003) "Physical and Chemical Status of Prestellar Core B68," Astron J. 126, 311
  13. Velusamy, T., Langer, W. D., & Goldsmith, P. F. (2002) "Tracing the Infall and the Accretion Shock in the Protostellar Disk: L1157," Astrophy J. (Letters), 565, L43
  14. Velusamy, T. & Beichman, C.A (2001) "Nulling interferometry for planet detection: sensitivity & image reconstruction," 2001 IEEE Aerospcae Conference Proceedings, Vol 4, p2013.
  15. Dickens, J.E., Langer, W.D. & Velusamy, T. (2001) "Small-scale abundance variations in TMC1: dynamics and hydrocarbon chemistry," ApJ, 558, 693
  16. Levin, S.M., Langer, W.D., Velusamy, T., Kuiper, T.B.H. & Crutcher, R.M. (2001) "Measuring magnetic field strength in L1498 with Zeeman splitting observations of CCS," ApJ, 555, 830
  17. Jura, M., Werner, M.W. & Velusamy, T. (2001) "What next for the likely pre-supernova, HD179821?," ApJ, 556, 408
  18. Langer, W.D., van Dishoek, E.F., Bergin, E.A., Blake, G.A., Tielens, G.G.M., Velusamy, T., Whittet, D.C.B., (2000) "Chemical Evolution of protostellar Matter," in Planets and Protostars IV, ed. V.Mannings, A.P. Boss. & S.S. Russel (Tuscon: Univ. Arizona)
  19. Goldsmith, P. F., Langer, W. D. & Velusamy, T., (1999) "Detection of Methanol in a Class 0 Protostellar Disk," Astrophy J. (Letters), 519, L173
  20. Velusamy, T., Beichman, C.A. & Shao, M. (1999) "A Dual 3-Element Nulling Interferometer for TPF," in Optical and IR Interferometry from Ground and Space, ASP Conf Series, Vol 194, 430.
  21. Beichman, C.A. & Velusamy, T. (1999) "Sensitivity of the TPF Interferometer for Panet Detection" in Optical and IR Interferometry from Ground and Space, ASP Conf Series, Vol 194, 408
  22. Velusamy, T., & Langer, W.D., (1998) "Outflow-Infall Interactions as a Mechanism for Terminating Accretion in Protostars," Nature, 392, 685
  23. Velusamy, T., Kuiper, T. B. H. & Langer, W. D. (1995) "Imaging Infall: CCS observations of the protostellar envelope of B335." ApJ, 451, L75.
  24. Velusamy, T. 1984, "Radio detection of a jet in the Crab Nebula," Nature, 308..251

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