3 - 14 micron Spectroscopy of Comet C/1999 T1(McNaught-Hartley)

Details 3 - 14 micron Spectroscopy of Comet C/1999 T1(McNaught-Hartley) 3 - 14 micron Spectroscopy of Comet C/1999 T1(McNaught-Hartley)

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.7006l&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #70.06; Bulletin of the American Astronomical Society, Vol. 33, p.1176

Astronomy and Astrophysics

Astronomy

Scientific paper

We report 3 - 14 micron spectroscopy of the comet on Jan 31.62 and Feb 1.7 2001 UT (delta 1.29 AU, r = 1.40 AU) using BASS on the IRTF. The spectrum showed a silicate emission feature extending about 10 prominent emission features at 10.4 microns and 11.2 microns appeared above the silicate band, the latter seemingly indicative of crystalline olivine. The 8-13 micron color temperature was 260 +/- 10 K., approximately 11 black body radiative equilibrium temperature of 235 K. Brightness at [N] was 3+/- 0.1. On the second night, the two prominent emission features were absent, although the silicate emission feature maintained it's trapezoidal shape with breaks at 9.5 and 11.2 microns. This work supported by NASA's Origins program grant NAG 5-9475, and by The Aerospace Corporation's Independent Research and Development program. The authors were visiting astronomers at NASA's Infrared Telescope Facility operated by the Univeristy of Hawaii.

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