1995A&A...299..641R

Query : 1995A&A...299..641R

1995A&A...299..641R - Astronomy and Astrophysics, volume 299641-646 (1995/7-3)

The redshift distribution of the Lyman-α forest clouds revisited.

ROESER H.-J.

Abstract (from CDS):

To study the evolution of the absorbing clouds in the so-called Lyman forest in the spectra of high redshift QSOs, a sample of 50 well studied objects is collected from the literature together with some new data. The statistical analysis of the redshift distribution of the Lyman-α lines supports a strong increase of the line densities at high redshifts (if dN/dz ∝(1+z)γ, γ=2.44±0.24). In addition, a flattening in the line distribution is indicated at the lowest redshifts accessible from the ground (z<2.3), consistent with recent HST observations. If at all, there is only a very weak indication of the so-called inverse effect, attributed to the Stroemgren sphere of the QSO under study. A behaviour similar to this effect may be generated by a flattening of the distribution of Lyman-lines at low redshifts.

Abstract Copyright: ∼

Journal keyword(s): quasars: absorption lines - cosmology: observations

CDS comments: QSO 0301-001 = 0301-0035, QSO 0956+123 = 0956+1217, QSO 2233+137 = 2233+1341

Simbad objects: 50

goto View the references in ADS

Number of rows : 50
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B0002-422 QSO 00 04 48.2718888096 -41 57 28.148932548   17.44 17.21     ~ 163 0
2 QSO B0002+0507 BLL 00 05 20.2155845040 +05 24 10.802758572   16.56 16.21 16.26   ~ 188 1
3 6C 001403+811827 BLL 00 17 08.47489694 +81 35 08.1365094   17.60 16.52 15.95   ~ 405 1
4 QSO B0029+073 QSO 00 32 18.3629227824 +07 38 32.567030700     18.4     ~ 40 0
5 LBQS 0058+0155 QSO 01 00 54.1201107072 +02 11 36.331220364   17.48 17.16     ~ 166 0
6 PHL 957 QSO 01 03 11.2741573824 +13 16 17.809871484   16.97 16.57     ~ 350 0
7 QSO B0114-0857 QSO 01 17 23.3714433288 -08 41 32.345217240   17.4 17.7     ~ 62 0
8 4C -04.04 QSO 01 22 27.8852581608 -04 21 27.176403816   17.34 16.88     ~ 194 1
9 QSO B0122-379 QSO 01 24 17.3720154480 -37 44 22.919854020     17.1     ~ 121 0
10 QSO B0142-100 QSO 01 45 16.5958283760 -09 45 17.265131352   17.23 16.95     ~ 247 1
11 QSO B0207-0019 QSO 02 09 50.7145927344 -00 05 06.457492608   17.45 17.21     ~ 133 0
12 QSO J0217+0144 Bla 02 17 48.95475095 +01 44 49.6990271   16.74 16.09 18.51 13.29 ~ 455 1
13 QSO B0237-2322 QSO 02 40 08.1743783856 -23 09 15.729012036   16.78 16.63     ~ 516 1
14 LBQS 0256-0000 QSO 02 59 05.6356015320 +00 11 21.964472340   18.50 18.11     ~ 137 0
15 LBQS 0301-0035 QSO 03 03 41.0487601176 -00 23 21.907819248   18.26 17.93 17.6   ~ 121 0
16 QSO B0347-383 QSO 03 49 43.6603590912 -38 10 30.825444900     17.3     ~ 196 0
17 QSO B0351-390 QSO 03 53 19.3237733976 -38 55 55.485652368     17.9     ~ 24 0
18 QSO J0422-3844 BLL 04 22 14.7829521792 -38 44 52.826059032   17.70 16.92 16.3   ~ 203 2
19 QSO B0421+019 Bla 04 24 08.5620692040 +02 04 24.965341248   17.18 17.04     ~ 157 1
20 QSO J0427-1303 QSO 04 27 07.3053460464 -13 02 53.708724168     17.50     ~ 160 1
21 QSO B0449-135 QSO 04 51 42.7191531552 -13 20 46.950207288   18.9 17.0     ~ 57 2
22 QSO J0455-4216 QSO 04 55 23.0626782912 -42 16 17.398553052   17.77 17.06     ~ 144 0
23 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 234 1
24 QSO B0836+1122 QSO 08 39 32.9958412872 +11 12 06.594966828     18.8     ~ 93 0
25 QSO B0837+109 QSO 08 40 17.8827090408 +10 34 28.944945084   18.77 18.48     ~ 45 1
26 LB 8775 QSO 08 51 41.7703796136 +16 12 21.956419620   16.70       ~ 93 0
27 QSO B0913+0715 QSO 09 16 13.9618240848 +07 02 24.497778588     17.1     ~ 109 0
28 QSO J0958+1202 QSO 09 58 52.1994218616 +12 02 45.038331528   18.24 17.91     ~ 129 0
29 Ton 34 QSO 10 19 56.5979680488 +27 44 01.738221864   16.06 15.69     ~ 114 0
30 4C 10.29 QSO 10 20 09.9945425592 +10 40 02.694508932   18.74 18.35     ~ 108 1
31 QSO J1039-2719 QSO 10 39 21.8517992640 -27 19 16.435341732     17.4     ~ 92 0
32 QSO B1038-2712 QSO 10 40 32.2200380808 -27 27 49.078018224   17.9 17.7     ~ 44 0
33 PG 1101-264 QSO 11 03 25.2993421704 -26 45 15.808554720   16.08 16.02     ~ 247 1
34 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 703 2
35 QSO B1151+068 QSO 11 54 11.0745443880 +06 34 27.165655200     18.6     ~ 59 0
36 QSO B1159+123 QSO 12 01 47.9118521640 +12 06 30.253926276   18.85 18.16     ~ 108 0
37 LBQS 1213+0922 QSO 12 15 39.6647410392 +09 06 07.448316408   18.88 18.65     ~ 74 1
38 Ton 618 Bla 12 28 24.9659725464 +31 28 37.628987592   16.15 15.87 15.35   ~ 294 1
39 LB 19 QSO 12 50 05.7146863848 +26 31 07.598352000   16.12 15.92     ~ 207 0
40 QSO B1445+101 Bla 14 45 16.46525080 +09 58 36.0727447   18.58 17.78     ~ 408 2
41 QSO B1510+110 QSO 15 12 49.2979644888 +11 19 29.391971664   18.16 17.97     ~ 50 1
42 QSO B1511+091 QSO 15 13 52.5256082976 +08 55 55.726612572   18.22 17.92     ~ 66 1
43 QSO B1548+093 QSO 15 51 03.3924811488 +09 08 49.193871756   18.29 18.07     ~ 85 0
44 4C 26.48A QSO 16 25 14.1658435776 +26 50 26.520864144   18.85 18.65     ~ 117 1
45 QSO B1623+268A QSO 16 25 48.0865431168 +26 44 32.575702092   18.59 18.41     ~ 89 0
46 QSO B2000-330 Bla 20 03 24.1161711720 -32 51 45.136882080   18.83 18.4 17.11   ~ 279 1
47 QSO B2126-15 Bla 21 29 12.17589329 -15 38 41.0419083   17.61 17.3 17.3   ~ 521 1
48 QSO B2204-408 QSO 22 07 34.4148160200 -40 36 56.006127540   18.76 17.57     ~ 64 0
49 QSO B2206-1959 QSO 22 09 00.6950774976 -19 44 19.743416484     18.65     ~ 85 0
50 KODIAQ J223627+135714 QSO 22 36 27.0824133456 +13 57 14.024012004   19.04 18.73     ~ 71 0

To bookmark this query, right click on this link: simbad:objects in 1995A&A...299..641R and select 'bookmark this link' or equivalent in the popup menu