The IRC + 10216 circumstellar envelope. III - Infrared molecular line profiles

Autor:	J. J. Keady, Stephen T. Ridgway
Rok vydání:	1993
Předmět:	Physics Long-period variable star business.industry Infrared Analytical chemistry Shell (structure) Infrared spectroscopy Astronomy and Astrophysics Circumstellar envelope Carbon star Optics Space and Planetary Science business Absorption (electromagnetic radiation) Line (formation)
Zdroj:	The Astrophysical Journal. 406:199
ISSN:	1538-4357 0004-637X
DOI:	10.1086/172431
Popis:	The 10 μm spectrum (780-1240 cm −1 ) has been surveyed with a resolution of 0.009 cm −1 . Numerous molecular vibration-rotation transitions were detected in absorption by the circumstellar shell. Analysis of the line profiles by means of spectral synthesis from models revealed radial abundance ratio variations in some species. SiO is approximately uniformly mixed through the inner shell. SiH 4 and NH 3 are apparently produced in the region 10 to 40 R * , possibly by formation on grains. CS is very strongly depleted in the region 100-1000 R * , perhaps onto grains. From nondetection of H 2 the current mass-loss rate is constrained to be less than 4×10 −5 M ○. yr −1
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a168a9c9b70effb76bcef1602fba4fe3 https://doi.org/10.1086/172431 Zobrazit plný text záznamu