THE INFRARED-SPECTRUM OF COMET-C 1995-O1 (HALE-BOPP) AT 4.6 AU FROM THE SUN/

Authors
CROVISIER J BROOKE TY HANNER MS KELLER HU LAMY PL ALTIERI B BOCKELEEMORVAN D JORDA L LEECH K LELLOUCH E
Citation
J. Crovisier et al., THE INFRARED-SPECTRUM OF COMET-C 1995-O1 (HALE-BOPP) AT 4.6 AU FROM THE SUN/, Astronomy and astrophysics, 315(2), 1996, pp. 385-388
Citations number
27
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
315
Issue
2
Year of publication
1996
Pages
385 - 388
Database
ISI
SICI code
0004-6361(1996)315:2<385:TIOC1(>2.0.ZU;2-U
Abstract
Comet C/1995 01 (Hale-Bopp) was observed on 27 April 1996 with the ISO PHOT instrument of ISO when it was at 4.6 AU from the Sun. The 2.5-12 mu m spectrum was recorded at low resolution. We present here the prel iminary results of this observation. The 2.5-5 mu m spectrum shows emi ssion in the CO2 v(3) band. The CO2 production rate is about 1.3 x 10( 28) s(-1). The 6-12 mu m spectrum shows thermal emission at a colour t emperature of 162 K (6-8 mu m range) and a strong silicate band around 10 mu m, with a narrow feature at 11.2 mu m indicative of crystalline silicates.