2004AJ....127.2598S

Query : 2004AJ....127.2598S

2004AJ....127.2598S - Astron. J., 127, 2598-2603 (2004/May-0)

The evolution of the intergalactic medium transmission to redshift 6.

SONGAILA A.

Abstract (from CDS):

We have measured the transmission of the Lyα forest produced by neutral hydrogen scattering in the intergalactic medium between redshifts 2 and 6.3 using high signal-to-noise, high-resolution (R≥5000) observations of 50 quasars spread over the redshift range. We use a uniform set of 15 Å intervals covering Lyα, Lyβ, and Lyγ absorption regions to tabulate the forest transmission as a function of redshift. The transmitted fractions show a relatively smooth evolution over the entire range of redshifts, which can be modeled with a smoothly decreasing ionization rate. Previous claims of an abrupt change at z∼6 appear in part to be a consequence of an incorrect conversion of Lyβ to Lyα optical depths. The tabulated transmissions can be used to calculate the colors of objects with a specified input spectrum as a function of redshift. We calculate the colors of a flat-fνgalaxy with a large intrinsic continuum break as an important example.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Early Universe - Galaxies: Formation - Galaxies: Intergalactic Medium - Galaxies: Quasars: Absorption Lines

CDS comments: Tables 1 and 2 : some identifications are for B1950, other for J2000.

Simbad objects: 51

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Number of rows : 51
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 6C 001403+811827 BLL 00 17 08.47489694 +81 35 08.1365094   17.60 16.52 15.95   ~ 405 1
2 QSO B0119+1432 QSO 01 21 56.0329026024 +14 48 23.901970068   17.57 17.37     ~ 54 0
3 QSO J0206+1216 QSO 02 06 51.3710130024 +12 16 24.288554748     21.51     ~ 12 0
4 QSO J0211-0009 QSO 02 11 02.7239895552 -00 09 10.336384080     22.00     ~ 45 0
5 QSO J0231-0728 QSO 02 31 37.6463945454 -07 28 54.550661965   25.25 23.17     ~ 72 0
6 LBQS 0256-0000 QSO 02 59 05.6356015320 +00 11 21.964472340   18.50 18.11     ~ 137 0
7 LBQS 0302-0019 QSO 03 04 49.8593341368 -00 08 13.534398816   18.08 17.80 17.5   ~ 261 0
8 QSO J0338+0021 QSO 03 38 29.3153623704 +00 21 56.241639108   25.10 23.26     ~ 106 0
9 QSO J0355-3811 QSO 03 55 04.8756518568 -38 11 42.543056760     17.95     ~ 26 0
10 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 234 1
11 QSO J0745+4734 QSO 07 45 21.7878198936 +47 34 36.191801820   16.76 16.44     ~ 103 0
12 QSO J0747+2739 QSO 07 47 11.1466907592 +27 39 03.365989812     17.20     ~ 74 0
13 QSO J0747+4434 QSO 07 47 49.7379630144 +44 34 17.086179108   22.88 21.15     ~ 58 0
14 QSO J0756+4104 QSO 07 56 18.139 +41 04 08.61   25.29 23.32     ~ 57 0
15 QSO J0801+5210 QSO 08 01 17.7968016048 +52 10 34.598421012   17.41 17.04     ~ 67 0
16 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 574 1
17 SDSS J083643.85+005453.3 QSO 08 36 43.8598536120 +00 54 53.233681320   26.19 24.17     ~ 170 0
18 QSO B0952-0115 QSO 09 55 00.1037541106 -01 30 06.549307797     18.7     ~ 150 0
19 QSO J0958+1202 QSO 09 58 52.1994218616 +12 02 45.038331528   18.24 17.91     ~ 129 0
20 SDSS J103027.09+052455.0 QSO 10 30 27.092 +05 24 55.02   26.15 25.44     ~ 303 0
21 QSO B1033-033 QSO 10 36 23.7457432848 -03 43 18.929156772     18.5     ~ 74 0
22 SDSS J104433.04-012502.0 QSO 10 44 33.040 -01 25 02.08     21.81     ~ 182 1
23 SDSS J104845.05+463718.3 QSO 10 48 45.058 +46 37 18.38   25.87 24.76     ~ 133 0
24 QSO B1052+04 err 10 55 05.2 +04 14 00           ~ 12 3
25 QSO J1057+4555 QSO 10 57 56.2610108784 +45 55 53.070401748   20.19 18.80 17.2 16.8 ~ 118 0
26 QSO B1104-181 QSO 11 06 33.3845199936 -18 21 23.829049296   15.8 15.9 15.7   ~ 338 1
27 QSO B1122-168 QSO 11 24 42.8658917592 -17 05 17.389038732   16.5 16.5 16.1   ~ 132 1
28 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 487 0
29 QSO B1159+123 QSO 12 01 47.9118521640 +12 06 30.253926276   18.85 18.16     ~ 108 0
30 QSO J1204-0021 QSO 12 04 41.7296276952 -00 21 49.533353712   25.41 22.94     ~ 82 0
31 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 389 5
32 QSO B1206+1155 QSO 12 09 17.9386504152 +11 38 30.374610684   18.15 17.89     ~ 78 0
33 SDSS J130608.25+035626.3 QSO 13 06 08.259 +03 56 26.19   25.59 24.81     ~ 176 0
34 QSO B1310+4254A QSO 13 12 15.2351758152 +42 39 00.885750948   18.93 18.73   17.97 ~ 57 0
35 QSO J1321+0038 QSO 13 21 10.8210785904 +00 38 21.621816744   24.05 22.60     ~ 42 0
36 QSO B1422+2309 BLL 14 24 38.0938 +22 56 00.587   16.77 15.84 14.79   ~ 464 1
37 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 359 0
38 QSO J1605-0112 QSO 16 05 01.2156865656 -01 12 20.699725824   26.55 24.30     ~ 42 0
39 QSO J1612+5255 QSO 16 12 53.086 +52 55 43.53   26.44 23.93     ~ 10 0
40 QSO B1623+269 QSO 16 25 48.7980918960 +26 46 58.784527056   17.77 17.64     ~ 109 0
41 QSO J1634+3203 BLL 16 34 12.7898408784 +32 03 35.425991844   17.92 17.71     ~ 67 1
42 HS 1700+6416 QSO 17 01 00.6194059368 +64 12 09.118892376   16.39 16.17     ~ 382 0
43 QSO J1737+5828 QSO 17 37 44.8816610544 +58 28 29.588650716   25.47 22.95     ~ 52 0
44 QSO B1937-1009 BLL 19 39 57.2566747152 -10 02 41.522299692   18.800 19.0 17.188   ~ 207 1
45 QSO B1946+770 QSO 19 44 54.8532392016 +77 05 52.673448048     15.8     ~ 156 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 J2200+0017 QSO 22 00 08.6658519792 +00 17 44.881206144   24.25 22.24     ~ 44 0
49 QSO J2216+0013 QSO 22 16 44.017 +00 13 48.12     23.0947 21.8154 20.1849 ~ 39 0
50 QSO B2237-0607 QSO 22 39 53.6812264896 -05 52 19.996061772     18.3     ~ 120 0
51 QSO B2347-4342 QSO 23 50 34.2593744544 -43 25 59.683985652   16.3 16.3     ~ 172 0

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