2003ApJ...589..722D

Query : 2003ApJ...589..722D

2003ApJ...589..722D - Astrophys. J., 589, 722-732 (2003/June-1)

Quasar elemental abundances at high redshifts.

DIETRICH M., HAMANN F., SHIELDS J.C., CONSTANTIN A., HEIDT J., JAEGER K., VESTERGAARD M. and WAGNER S.J.

Abstract (from CDS):

We examine rest-frame ultraviolet spectra of 70 high-redshift quasars (z≥3.5) to study the chemical enrichment history of the gas closely related to the quasars and thereby estimate the epoch of first star formation. The fluxes of several ultraviolet emission lines were investigated within the framework of the most recent photoionization models to estimate the metallicity of the gas associated with the high-redshift quasars. Standard photoionization parameters and the assumption of secondary nitrogen enrichment indicate an average abundance of Z/Z☉≃4-5 in the line-emitting gas. Assuming a timescale of τevol≃0.5-0.8 Gyr for the chemical enrichment of the gas, the first major star formation for quasars with z≃4 should have started at a redshift of zf≃6-8, corresponding to an age of the universe of several times 108 yr (H0=65 km.s–1.Mpc–1, ΩM=0.3, ΩΛ=0.7). We note that this also appears to be the era of reionization of the universe. Finally, there is some evidence for a positive luminosity-metallicity relation in this high-redshift quasar sample.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Abundances - Galaxies: Active - Galaxies: Evolution - Galaxies: High-Redshift - Galaxies: Quasars: General

CDS comments: Table 1 : Several misprints, Q1422WOWccs02 not identified.

Simbad objects: 68

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Number of rows : 68
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 QSO J0003-2603 QSO 00 03 22.9531962024 -26 03 18.304471908   18 17.53     ~ 291 0
2 QSO J0003+2730 QSO 00 03 23.0711057688 +27 30 24.252222312     19.00     ~ 10 0
3 QSO B0019-1522 QSO 00 22 08.0390087400 -15 05 39.983288316     19.0     ~ 59 0
4 [VV98] J002950.0+054204 QSO 00 29 50.0 +05 42 04     21.49     ~ 13 0
5 [VV96] J003004.7+053813 QSO 00 30 04.7 +05 38 13     21.93     ~ 15 0
6 QSO J0035+0040 QSO 00 35 25.2917898096 +00 40 02.807161536   24.03 22.48     ~ 36 0
7 QSO B0046-2919 QSO 00 48 29.5640320512 -29 03 21.335341644     19.5     ~ 32 0
8 QSO B0046-2815 QSO 00 49 24.3965787000 -27 59 02.111546868   19.65 18.32     ~ 11 0
9 QSO J0059+0003 QSO 00 59 22.6502935968 +00 03 01.440525204   23.24 21.11     ~ 56 0
10 QSO B0101-304 QSO 01 03 37.3953599448 -30 08 59.880019452     20.1     ~ 42 0
11 QSO B0103+00 QSO 01 06 19.2392271120 +00 48 23.369353992   21.68 20.23     ~ 94 0
12 QSO B0104+0215 QSO 01 06 49.6990475520 +02 31 00.489421776     19.73     ~ 24 0
13 QSO B0131+013 QSO 01 33 48.8103848088 +01 36 16.233728688     19.4     ~ 22 0
14 QSO J0152+0735 QSO 01 52 11.0581267512 +07 35 50.228167776     19.60     ~ 19 0
15 QSO B0151-00 QSO 01 53 39.6078379368 -00 11 04.929367704   21.73 20.12     ~ 71 0
16 QSO B0241-01 QSO 02 44 01.8451874040 -01 34 03.848758680     18.20     ~ 61 0
17 QSO B0245-0608 QSO 02 47 56.5751683632 -05 55 58.779041160     18.60     ~ 27 0
18 QSO J0248+1802 QSO 02 48 54.2720204400 +18 02 49.274967876     18.4     ~ 47 0
19 QSO B0307+0222 QSO 03 09 51.26 +02 33 21.6     20.39     ~ 21 0
20 QSO J0338+0021 QSO 03 38 29.3153623704 +00 21 56.241639108   25.10 23.26     ~ 101 0
21 QSO B0345+015 QSO 03 48 02.2826431608 +01 39 16.417849500     21.7     ~ 23 0
22 QSO B0351-1034 QSO 03 53 46.9729812432 -10 25 18.977437308     18.7     ~ 32 0
23 QSO J0403-1703 QSO 04 03 56.6606313000 -17 03 21.923360028     18.7     ~ 32 0
24 QSO B0751+5623 QSO 07 55 43.9341726216 +56 15 07.217918028     19.91     ~ 25 0
25 QSO B0910+564 QSO 09 14 39.3579390480 +56 13 20.367548796   20.95 20.87     ~ 34 1
26 QSO B0951-0450 QSO 09 53 55.7485789920 -05 04 18.968856168     19.0     ~ 59 0
27 QSO B0952-0115 QSO 09 55 00.1037541106 -01 30 06.549307797     18.7     ~ 144 0
28 QSO B0953+47 QSO 09 56 25.1645972520 +47 34 42.468198132     19.47     ~ 65 1
29 QSO B1013+0035 QSO 10 15 49.0046761680 +00 20 20.010036984   22.25 20.79     ~ 70 0
30 QSO B1033-033 QSO 10 36 23.7457432848 -03 43 18.929156772     18.5     ~ 73 0
31 QSO B1050-0000 QSO 10 53 20.4267162840 -00 16 49.652922360   22.49 20.77     ~ 65 0
32 QSO J1057+4555 QSO 10 57 56.2610108784 +45 55 53.070401748   20.19 18.80 17.2 16.8 ~ 114 0
33 QSO B1108-07 QSO 11 11 13.600 -08 04 02.00     18.10     ~ 81 0
34 QSO B1114-0822 QSO 11 17 27.1607083896 -08 38 57.200381664     19.40     ~ 19 0
35 QSO B1158+465 QSO 12 00 36.7346890920 +46 18 50.324566608   24.07 22.42     ~ 62 0
36 QSO B1159+123 QSO 12 01 47.9118521640 +12 06 30.253926276   18.85 18.16     ~ 104 0
37 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 376 5
38 QSO B1208+101 QSO 12 10 57.0369007056 +09 54 27.069784092     17.5     ~ 113 1
39 QSO B1233+478 QSO 12 35 31.0560584712 +47 36 06.792806124     20.63     ~ 18 0
40 QSO B1247+3406 QSO 12 49 42.1288582896 +33 49 53.854426452     20.4     ~ 51 0
41 QSO B1251-407 QSO 12 53 59.53371155 -40 59 30.6858434   23.7 19.9 19.9   ~ 51 1
42 QSO B1301+477 QSO 13 04 04.6529547984 +47 31 29.515119132   22.97 21.57     ~ 14 0
43 QSO J1317+3531 QSO 13 17 43.1304151704 +35 31 31.964624292   22.58 20.95     ~ 43 0
44 QSO B1328-0433 QSO 13 31 30.8784411624 -04 48 51.584989320     19.0     ~ 18 0
45 QSO B1330+0108 QSO 13 32 54.5135635824 +00 52 50.616766632   19.34 18.70     ~ 36 0
46 BRI B1335-0417 G 13 38 03.4151935680 -04 32 34.981751112   19.4       ~ 102 0
47 QSO B1346-033 QSO 13 49 16.6595971512 -03 37 15.649009140   21.23 19.91     ~ 40 0
48 [VV98] J145300.6+335206 QSO 14 53 00.6255321840 +33 52 07.663469196   23.34 21.91     ~ 12 0
49 QSO B1500+0824 QSO 15 02 45.3659459880 +08 13 05.191513248   20.77 19.43     ~ 24 0
50 QSO B1508+572 QSO 15 10 02.92237321 +57 02 43.3759220   22.73 21.38 19.23   ~ 202 0
51 [VV96] J155007.6+462855 QSO 15 50 07.5906004032 +46 28 55.663985172     19.24     ~ 16 0
52 QSO J1559+0304 QSO 15 59 30.97261910 +03 04 48.2567339     19.8 19.77   ~ 78 1
53 QSO J1618+4125 QSO 16 18 22.7618612424 +41 25 58.324455228   22.31 20.91     ~ 37 0
54 QSO B1640+4628 QSO 16 42 05.1473324160 +46 22 26.057188380     19.52     ~ 25 0
55 QSO B1643+465A QSO 16 45 01.0720675632 +46 26 15.457356384     20.26     ~ 65 0
56 QSO B1643+465B QSO 16 45 19.8966946056 +46 25 39.406961712     20.61     ~ 40 0
57 4C 62.29 QSO 17 46 14.03413499 +62 26 54.7383195   20.91 19.51     ~ 116 1
58 QSO J1759+6638 QSO 17 59 28.0940839824 +66 38 52.633688352     21.9 20.220   ~ 31 0
59 QSO B2000-330 QSO 20 03 24.1161711720 -32 51 45.136882080   18.83 18.4 17.11   ~ 273 1
60 QSO B2047+013 QSO 20 50 23.2599151248 +01 35 10.726283688     19.71     ~ 26 0
61 QSO B2133-4311 QSO 21 36 23.8 -42 58 18   22.49 20.85     ~ 8 0
62 QSO B2133-4625 QSO 21 36 31.4 -46 11 41     20.96     ~ 6 0
63 QSO B2134-453 QSO 21 38 07.6 -45 08 19   21.32 20.15     ~ 6 0
64 QSO B2203+2915 QSO 22 06 02.6693254056 +29 30 02.103444720     22.0     ~ 32 1
65 QSO J2215-1611 QSO 22 15 27.2920172928 -16 11 33.057278052     18.10     ~ 56 0
66 QSO B2237-0607 QSO 22 39 53.6812264896 -05 52 19.996061772     18.3     ~ 118 0
67 QSO B2248-1244 QSO 22 51 18.1049437608 -12 27 03.295641708     18.5     ~ 29 0
68 QSO B2331+0216 QSO 23 34 32.0240241360 +02 33 21.191735700     19.98     ~ 35 0

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