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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