Observations of absorption by water vapor toward Sagittarius B2

被引：35

作者：

Neufeld, DA

Ashby, MLN

Bergin, EA

Chin, G

Erickson, NR

Goldsmith, PF

Harwit, M

Howe, JE

Kleiner, SC

Koch, DG

Patten, BM

Plume, R

Schieder, R

Snell, RL

Stauffer, JR

Tolls, V

Wang, Z

Winnewisser, G

Zhang, YF

Melnick, GJ

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[4] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[5] Cornell Univ, Natl Astron & Ionosphere Ctr, Dept Astron, Ithaca, NY 14853 USA

[6] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[7] Univ Cologne, Inst Phys 1, D-50937 Cologne, Germany

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 539卷 / 02期

关键词：

ISM : abundances; ISM : clouds; ISM : individual (Sagittarius B2); ISM : molecules; radio lines : ISM;

D O I：

10.1086/312853

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have observed the 1(10)-->1(01) pure rotational transitions of both (H2O)-O-16 and (H2O)-O-18 toward Sagittarius B2 using the Submillimeter Wave Astronomy Satellite. The spectra thereby obtained show a complex pattern of absorption and - in the case of (H2O)-O-16 - emission, with numerous features covering a wide range of LSR velocities (-130 to 130 km s(-1)) and representing absorption both in gas associated with Sgr B2 as well as by several components of foreground gas along the line of sight. The ortho-water abundance derived for the absorbing foreground gas is similar to 6 x 10(-7) relative to H-2.

引用

页码：L111 / L113

页数：3

共 23 条

[1] GALACTIC-CENTER MOLECULAR CLOUDS .2. DISTRIBUTION AND KINEMATICS
BALLY, J
STARK, AA
WILSON, RW
HENKEL, C
[J]. ASTROPHYSICAL JOURNAL, 1988, 324 (01) : 223 - &
[2] Baluteau JP, 1997, ASTRON ASTROPHYS, V322, pL33
[3] Cernicharo J, 1997, ASTRON ASTROPHYS, V323, pL25
[4] CUMMINS SE, 1986, ASTROPHYS J SUPPL S, V60, P819, DOI 10.1086/191102
[5] HIGH ANGULAR RESOLUTION SUBMILLIMETER OBSERVATIONS OF SAGITTARIUS B2
GOLDSMITH, PF
LIS, DC
HILLS, R
LASENBY, J
[J]. ASTROPHYSICAL JOURNAL, 1990, 350 (01) : 186 - 194
[6] GREAVES JS, 1992, ASTRON ASTROPHYS, V260, P381
[7] DENSITIES OF CLOUDS DETECTED IN MOLECULAR ABSORPTION
GREAVES, JS
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 273 (04) : 918 - 922
[8] GREAVES JS, 1994, ASTRON ASTROPHYS, V290, P259
[9] HUTTEMEISTER S, 1995, ASTRON ASTROPHYS, V300, P636
[10] HUTTEMEISTER S, 1995, ASTRON ASTROPHYS, V294, P667

← 1 2 3 →