2017ApJ...849..106S


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.21CET11:26:37

2017ApJ...849..106S - Astrophys. J., 849, 106-106 (2017/November-2)

An ultraviolet survey of low-redshift partial Lyman-limit systems with the HST Cosmic Origins Spectrograph.

SHULL J.M., DANFORTH C.W., TILTON E.M., MOLONEY J. and STEVANS M.L.

Abstract (from CDS):

We present an ultraviolet spectroscopic survey of strong H I absorbers in the intergalactic medium, probing their evolution over the last 6-7 Gyr at redshifts 0.24 <= z <= 0.84. We measure column densities N_H I_ (cm–2) from the pattern of Lyman-series absorption lines and flux decrement at the Lyman limit (LL) when available. We analyzed 220 H I absorbers in ultraviolet spectra of 102 active galactic nuclei (AGNs) taken by the Cosmic Origins Spectrograph on board the Hubble Space Telescope with G130M/G160M gratings (1134-1795 Å). For 158 absorbers with log N_H I_ >= 15, the mean frequency is d N/dz=4.95±0.39 over path length Δz = 31.94 (0.24 <= z <= 0.84). We identify eight Lyman limit systems (LLS, log N_H I_ >= 17.2) and 54 partial systems (pLLS) with 16.0 <= log N_H I_ < 17.2. Toward 159 AGNs in the range 0.01 < zabs < 0.84 with Δz ≃ 48, we find four damped Lyα absorbers (DLA) with (d N/dz)DLA=0.083–0.040+0.066 at <z>=0.18. The mean LLS frequency in z = 0.24-0.48 is (d N/dz)LLS=0.36–0.13+0.20 fitted to N(z)=(0.25–0.09+0.13)(1+z)1.14. For 54 pLLSs, we find (d N/dz)pLLS=1.69±0.23 at <z>=0.39, a frequency consistent with gaseous halo sizes R ≃ 100 h–1 kpc for (0.3-3L*) galaxies. A maximum-likelihood analysis yields a distribution f(N,z)=C0N^-β(1+z)γ^ with β = 1.48 ± 0.05 and γ=1.14–0.89+0.88 for 15 <= log N_H I_ <= 17.5. The far-UV opacity gradient is d τeff/dz ≃ (0.444)(1 + z)1.14 over the range 15 <= log N_H I_ <= 17, implying mean LyC optical depth τeff ≃ 0.3-0.5 toward sources at z = 1-2.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): cosmological parameters - cosmology: observations - intergalactic medium - quasars: absorption lines - ultraviolet: galaxies - ultraviolet: galaxies

Simbad objects: 50

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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 - 2020
#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 796 1
2 LBQS 0107-0235 QSO 01 10 13.1605010207 -02 19 52.838365692   18.39 17.80 17.61   ~ 72 1
3 QSO J0110-0218 QSO 01 10 16.2699632294 -02 18 50.763174832   17.4 17.3     ~ 54 1
4 2E 357 Sy1 01 19 35.6919706175 -28 21 31.421837195   18.13 16.3 16.58   ~ 47 0
5 QSO B0120-28 QSO 01 22 36.7682338442 -28 43 21.540163420   16.5 15.71     ~ 22 0
6 ICRF J020157.1-113233 Sy1 02 01 57.1798202842 -11 32 33.436998341   16.54 16.40 16.073   ~ 191 1
7 [VV2006] J020930.8-043827 QSO 02 09 30.7663695306 -04 38 26.145159788   17.5       ~ 37 0
8 4C -04.06 QSO 02 35 07.3417120791 -04 02 05.319157399   16.61 16.46 16.2   ~ 185 1
9 QSO J0311-7651 BLL 03 11 55.2500768688 -76 51 50.846014733 15.27 16.09 16.10 15.33   ~ 207 1
10 [VV2000] J044011.9-524818 QSO 04 40 12.0483632663 -52 48 17.513621270     16.10     ~ 25 0
11 2MASS J05522451-6402108 Sy1 05 52 24.5027349529 -64 02 10.759884103     15.04     ~ 34 1
12 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 504 1
13 QSO B0748+295 QSO 07 51 12.3037392178 +29 19 38.280101321   16.28 16.18     ~ 48 0
14 [VV2006] J080908.1+461925 QSO 08 09 08.1368585497 +46 19 25.571615204   16.83 16.72     ~ 31 0
15 [VV2006] J084349.5+411741 QSO 08 43 49.4976449374 +41 17 41.598281988   17.66 17.41     ~ 30 1
16 QSO J0910+1014 QSO 09 10 29.7513564363 +10 14 13.589584020   18.17 18.08     ~ 33 0
17 QSO J0925+4004 QSO 09 25 54.7066238132 +40 04 14.172232118   17.98 17.92     ~ 50 0
18 SBSG 0924+606B Sy1 09 28 37.9890360592 +60 25 21.019960119   17.53 17.20     ~ 67 1
19 QSO J0943+0531 QSO 09 43 31.6146386142 +05 31 31.475492151   17.50 17.30     ~ 39 0
20 QSO J1001+5944 QSO 10 01 02.5505167414 +59 44 14.375860747   16.44 16.27     ~ 41 0
21 [VV2000] J100535.2+013444 QSO 10 05 35.2475686493 +01 34 45.713245906   17.21 16.89     ~ 36 0
22 QSO J1009+0713 QSO 10 09 02.0698 +07 13 43.810   17.41 17.27     ~ 54 0
23 QSO J1016+4706 QSO 10 16 22.6163771760 +47 06 43.345280692   17.40 17.29     ~ 30 0
24 Ton 1329 QSO 11 05 39.8135767806 +34 25 34.684245994   16.02 15.89     ~ 44 0
25 [VV96] J111132.1+554725 QSO 11 11 32.1905428909 +55 47 26.087894257   17.20 17.02     ~ 39 0
26 Ton 576 Sy1 11 17 54.3258589805 +26 34 16.601128908   17.23 17.07     ~ 26 0
27 SBSG 1123+594A QSO 11 25 53.7897157999 +59 10 21.551797488   17.02 16.80     ~ 51 0
28 QSO J1133+0327 QSO 11 33 27.7853369704 +03 27 19.291014177   17.80 17.74     ~ 39 0
29 2MASS J11345760+2555279 QSO 11 34 57.6248616898 +25 55 27.891343913   16.5 17.13 17.0   ~ 18 0
30 LB 2126 QSO 11 51 20.4599330347 +54 37 33.049735861   16.03 15.78     ~ 141 0
31 QSO J1208+4540 QSO 12 08 58.0106507296 +45 40 35.422302500   16.00 15.70     ~ 175 0
32 PG 1216+069 Sy1 12 19 20.9316038223 +06 38 38.467864632   15.68 15.65     ~ 257 0
33 QSO J1245+3356 QSO 12 45 11.2585553606 +33 56 10.100141682   17.06 16.88     ~ 42 0
34 ICRF J130533.0-103319 Sy1 13 05 33.0149111397 -10 33 19.430590671   15.18 15.23 14.46   ~ 484 1
35 QSO J1341+4123 QSO 13 41 00.7893963759 +41 23 14.131471417   17.04 16.76     ~ 113 0
36 LBQS 1340-0038 QSO 13 42 51.6063318816 -00 53 45.389329298   17.15 16.98 17.418 16.198 ~ 66 0
37 QSO J1409+2618 QSO 14 09 23.9086975485 +26 18 21.053512073   16.07 15.74     ~ 179 0
38 PB 2049 QSO 14 19 10.2070716029 +42 07 46.910320933   16.9 17.31 17.1   ~ 36 0
39 QSO J1435+3604 QSO 14 35 11.5257790930 +36 04 37.175185990   17.30 17.22     ~ 47 0
40 2MASS J14372609+5045556 Sy1 14 37 26.1400363588 +50 45 55.886189649   17.89 17.67     ~ 35 0
41 [VV2006] J151428.6+361958 QSO 15 14 28.6533954139 +36 19 57.986587699   18.11 18.04     ~ 24 0
42 QSO B1521+1009 QSO 15 24 24.5235638849 +09 58 29.086612264   15.74 16.2     ~ 109 0
43 2MASS J15455347+0936205 QSO 15 45 53.4846811241 +09 36 20.501145402   16.93 16.87     ~ 13 0
44 QSO J1550+4001 QSO 15 50 48.3037879593 +40 01 44.916428482   17.36 17.30     ~ 37 0
45 QSO J1553+3548 QSO 15 53 04.9286795051 +35 48 28.559705264   16.93 16.73     ~ 36 0
46 QSO J1616+4154 QSO 16 16 49.4248503287 +41 54 16.353947335   17.41 17.29     ~ 43 0
47 QSO J1619+3342 QSO 16 19 16.5425919659 +33 42 38.374637994   17.30 17.26     ~ 46 0
48 QSO B1630+3744 QSO 16 32 01.1118986024 +37 37 49.980862599   16.50 16.30     ~ 157 0
49 QSO J2155-0922 Sy1 21 55 01.5123415724 -09 22 24.351917710   13.9 16.8 14.1   ~ 153 0
50 PB 5524 QSO 23 45 00.4379710330 -00 59 36.071162685   17.66 17.44     ~ 42 0

    Equat.    Gal    SGal    Ecl

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2020.02.21-11:26:37

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