HD molecular lines in an absorption system at redshift z=2.3377

被引：55

作者：

Varshalovich, DA

Ivanchik, AV

Petitjean, P

Srianand, R

Ledoux, C

机构：

[1] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] Inst Astrophys, F-75014 Paris, France

[3] IUCAA, Pune, Maharashtra, India

[4] ESO, Munich, Germany

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2001年 / 27卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

quasar spectra; observational cosmology;

D O I：

10.1134/1.1415856

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Having analyzed the spectrum of the quasar PKS 1232+0.82 taken by Petitjean et al. (2000), we identified HD molecular lines in an absorption system at redshift z = 2.3377. We estimated the column density of HD molecules in this system, N(HD) = (1-4) x 10(14) cm(-2). The excitation temperature of the first rotational level J=1 relative to the ground state J=0 is T-ex = 70 +/-7 K. As far as we know, this is the first detection of HD molecules at high redshift. (C) 2001 MAIK "Nauka/Interperiodica".

引用

页码：683 / 685

页数：3

共 10 条

[1]

Allison A. C., 1970, Atomic Data, V1, P289

[2] ABSORPTION AND EMISSION-SPECTRA OF HD IN VACUUM ULTRAVIOLET [J].