A search for interstellar gas-phase CO2 gas: Solid state abundance ratios

被引：0
作者：
vanDishoeck, EF
Helmich, FP
deGraauw, T
Black, JH
Boogert, ACA
Ehrenfreund, P
Gerakines, PA
Lacy, JH
Millar, TJ
Schutte, WA
Tielens, AGGM
Whittet, DCB
Boxhoorn, DR
Kester, DJM
Leech, K
Roelfsema, PR
Salama, A
Vandenbussche, B
机构：
[1] SRON, NL-9700 AV GRONINGEN, NETHERLANDS
[2] CHALMERS UNIV TECHNOL, ONSALA SPACE OBSERV, S-43992 ONSALA, SWEDEN
[3] KAPTEYN ASTRON INST, NL-9700 AV GRONINGEN, NETHERLANDS
[4] RENSSELAER POLYTECH INST, DEPT PHYS APPL PHYS & ASTRON, TROY, NY 12180 USA
[5] UNIV MANCHESTER, INST SCI & TECHNOL, DEPT PHYS, MANCHESTER M60 1QD, LANCS, ENGLAND
[6] NASA, AMES RES CTR, MOFFETT FIELD, CA 94035 USA
[7] ESA, DIV ASTROPHYS, SCI OPERAT CTR, ISO, E-28080 VILLAFRANCA, MADRID, SPAIN
[8] KATHOLIEKE UNIV LEUVEN, INST STERRENKUNDE, B-3001 HEVERLEE, BELGIUM
[9] UNIV TEXAS, DEPT ASTRON, AUSTIN, TX 78712 USA
来源：
ASTRONOMY & ASTROPHYSICS | 1996年 / 315卷 / 02期
关键词：
ISM; abundances; molecules; individual; AFGL; 2591; 4176; 2136; NGC; 7538; IRS9;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present searches for gas-phase CO2 features in the ISO-SWS infrared spectra of four deeply embedded massive young stars, which all show strong solid CO2 absorption. The abundance of gas-phase CO2 is at most 2. 10(-7) with respect to H-2, and is less than 5% of that in the solid phase. This is in strong contrast to CO, which is a factor of 10-100 more abundant in the gas than in solid form in these objects. The gas/solid state ratios of CO2, CO and H2O are discussed in terms of the physical and chemical state of the clouds.
引用
收藏
页码：L349 / L352
页数：4
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