THE CARBON ABUNDANCE OF THE LYMAN-ALPHA CLOUDS

被引：43

作者：

LU, LM ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 379卷 / 01期

关键词：

ABUNDANCES; GALAXIES - INTERGALACTIC MEDIUM; QUASARS;

D O I：

10.1086/170487

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for C IV lambda-lambda-1548, 1550 absorption associated with Ly-alpha forest clouds is attempted, using a method similar to the composite spectrum method developed by Norris, Hartwick, & Peterson. We tentatively report a detection of C IV lambda-1548 absorption feature at greater-than-or-equal-to 99.99% significance level. If confirmed, not all Ly-alpha clouds have primordial composition. Assuming that the absorption feature is real, we estimate the relative abundance of carbon of the Ly-alpha forest clouds to be roughly [C/H] approximately -3.2 from photoionization models. Some other interesting results are also discussed.

引用

页码：99 / 106

页数：8

共 18 条

[1] REDSHIFT EVOLUTION OF THE LYMAN-LINE ABSORBING CLOUDS IN QUASAR SPECTRA
ATWOOD, B
BALDWIN, JA
CARSWELL, RF
[J]. ASTROPHYSICAL JOURNAL, 1985, 292 (01) : 58 - 71
[2] HIGH-REDSHIFT QSO ABSORBING CLOUDS AND THE BACKGROUND IONIZING SOURCE
CARSWELL, RF
WEBB, JK
BALDWIN, JA
ATWOOD, B
[J]. ASTROPHYSICAL JOURNAL, 1987, 319 (02) : 709 - 722
[3] THE ABSORPTION-LINE PROFILES IN Q1101-264
CARSWELL, RF
MORTON, DC
SMITH, MG
STOCKTON, AN
TURNSHEK, DA
WEYMANN, RJ
[J]. ASTROPHYSICAL JOURNAL, 1984, 278 (02) : 486 - &
[4] ON THE ABUNDANCE OF METALS AND THE IONIZATION STATE IN ABSORBING CLOUDS TOWARD QSOS
CHAFFEE, FH
FOLTZ, CB
BECHTOLD, J
WEYMANN, RJ
[J]. ASTROPHYSICAL JOURNAL, 1986, 301 (01) : 116 - 123
[5] HIGH-RESOLUTION SPECTROSCOPY OF SELECTED ABSORPTION-LINES TOWARD QUASI-STELLAR OBJECTS .2. THE METAL-TO-HYDROGEN RATIO IN A METAL-FREE CLOUD TOWARD S5 0014+81
CHAFFEE, FH
FOLTZ, CB
ROSER, HJ
WEYMANN, RJ
LATHAM, DW
[J]. ASTROPHYSICAL JOURNAL, 1985, 292 (02) : 362 - 370
[6] FERLAND GJ, 1983, APJ, V264, P165
[7] AN OPTIMAL EXTRACTION ALGORITHM FOR CCD SPECTROSCOPY
HORNE, K
[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1986, 98 (604) : 609 - 617
[8] ABSORPTION-SPECTRUM OF THE Z=3.78 QSO-2000-330 .1. THE LYMAN-ALPHA FOREST REGION AT 1.5 A RESOLUTION
HUNSTEAD, RW
MURDOCH, HS
PETERSON, BA
BLADES, JC
JAUNCEY, DL
WRIGHT, AE
PETTINI, M
SAVAGE, A
[J]. ASTROPHYSICAL JOURNAL, 1986, 305 (01) : 496 - 512
[9] OBSERVATIONS OF WEAK-C-IV ABSORPTION TOWARD THE QSOS 2000-330 AND 2126-158
MEYER, DM
YORK, DG
[J]. ASTROPHYSICAL JOURNAL, 1987, 315 (01) : L5 - L9
[10] ABSORPTION-SPECTRUM OF THE Z = 3.78 QSO 2000-330 .2. THE REDSHIFT AND EQUIVALENT WIDTH DISTRIBUTIONS OF PRIMORDIAL HYDROGEN CLOUDS
MURDOCH, HS
HUNSTEAD, RW
PETTINI, M
BLADES, JC
[J]. ASTROPHYSICAL JOURNAL, 1986, 309 (01) : 19 - 32

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