The high-redshift deuterium abundance: The z=3.086 absorption complex towards Q 0420-388

被引：48

作者：

Carswell, RF

Webb, JK

Lanzetta, KM

Baldwin, JA

Cooke, AJ

Williger, GM

Rauch, M

Irwin, MJ

Robertson, JG

Shaver, PA

机构：

[1] UNIV NEW S WALES,SCH PHYS,KENSINGTON,NSW 2033,AUSTRALIA

[2] SUNY STONY BROOK,DEPT EARTH & SPACE SCI,ASTRON PROGRAM,STONY BROOK,NY 11794

[3] CERRO TOLOLO INTERAMER OBSERV,LA SERENA,CHILE

[4] ROYAL OBSERV,EDINBURGH EH9 3HJ,MIDLOTHIAN,SCOTLAND

[5] MAX PLANCK INST ASTRON,D-69117 HEIDELBERG,GERMANY

[6] OBSERV CARNEGIE INST WASHINGTON,PASADENA,CA 91101

[7] ROYAL GREENWICH OBSERV,CAMBRIDGE CB3 0EZ,ENGLAND

[8] UNIV SYDNEY,DEPT ASTRON,SYDNEY,NSW 2006,AUSTRALIA

[9] EUROPEAN SO OBSERV,D-85748 GARCHING,GERMANY

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1996年 / 278卷 / 02期

关键词：

galaxies; abundances; quasars; absorption lines; individual; 0420; -; 388;

D O I：

10.1093/mnras/278.2.506

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The redshift z(abs) = 3.08 absorption complex towards the z(em) = 3.12 quasar 0420 - 388 has high H I column density components with heavy element abundances similar to 1/10 solar. A low-redshift component of the complex has H I column density similar to 10(18) cm(-2), and some of the higher order Lyman lines are clean enough to permit a measurement of the deuterium column density for this component. However, while the putative deuterium column density is fairly well-determined, the H I column density is very uncertain so, if the deuterium identification is correct, the D/H ratio for this component could have any value > 2 x 10(-5). The D I/O I ratio is much better constrained, and has a value similar to 2. If the O I/H I ratio is constant throughout the complex, then D/H similar to 2 x 10(-4).

引用

页码：506 / 518

页数：13

共 16 条

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