2013ApJ...765..137O


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST04:49:05

2013ApJ...765..137O - Astrophys. J., 765, 137 (2013/March-2)

The HST/ACS+WFC3 survey for Lyman limit systems. II. Science.

O'MEARA J.M., PROCHASKA J.X., WORSECK G., CHEN H.-W. and MADAU P.

Abstract (from CDS):

We present the first science results from our Hubble Space Telescope survey for Lyman limit absorption systems (LLS) using the low dispersion spectroscopic modes of the Advanced Camera for Surveys and the Wide Field Camera 3. Through an analysis of 71 quasars, we determine the incidence frequency of LLS per unit redshift and per unit path length, ℓ(z) and ℓ(X), respectively, over the redshift range 1 < z < 2.6, and find a weighted mean of ℓ(X) =0.29±0.05 for 2.0 < z < 2.5 through a joint analysis of our sample and that of Ribaudo et al. Through stacked spectrum analysis, we determine a median (mean) value of the mean free path to ionizing radiation at z = 2.4 of λ912mfp= 243(252) h–172Mpc, with an error on the mean value of ±43 h–172Mpc. We also re-evaluate the estimates of λ912 mfp from Prochaska et al. and place constraints on the evolution of λ912 mfp with redshift, including an estimate of the "breakthrough" redshift of z = 1.6. Consistent with results at higher z, we find that a significant fraction of the opacity for absorption of ionizing photons comes from systems with N_ H I_ ≤ 1017.5/cm2 with a value for the total Lyman opacity of τLymaneff= 0.40±0.15. Finally, we determine that at minimum, a 5-parameter (4 power law) model is needed to describe the column density distribution function f(N_ H I_, X) at z ∼ 2.4, find that f(N_H I_, X) undergoes no significant change in shape between z ∼ 2.4 and z ∼ 3.7, and provide our best fit model for f(N_ H I_, X).

Abstract Copyright:

Journal keyword(s): cosmology: observations - intergalactic medium - quasars: absorption lines - quasars: general - surveys - ultraviolet: general

VizieR on-line data: <Available at CDS (J/ApJ/765/137): table1.dat table2.dat table6.dat>

Simbad objects: 71

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Number of rows : 71

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 [VV2006] J010658.0-085500 QSO 01 06 57.9459818511 -08 55 00.149870418   18.60 18.38     ~ 19 0
2 [VV2006] J023359.7+004938 QSO 02 33 59.7211678035 +00 49 38.469217494   17.98 17.80     ~ 33 0
3 [VV2006] J034024.6-051909 QSO 03 40 24.5841870397 -05 19 09.404267282   18.19 18.07     ~ 19 0
4 [VV2006] J040241.5-064137 QSO 04 02 41.4340060430 -06 41 37.989831462   18.32 18.12     ~ 20 0
5 [VV2006] J075158.6+424522 QSO 07 51 58.6503987525 +42 45 22.873588837   18.09 17.90     ~ 26 0
6 [VV2006] J075547.8+220450 QSO 07 55 47.8417927170 +22 04 50.228866629   18.15 17.94     ~ 32 0
7 QSO J0804+2516 QSO 08 04 13.6613003138 +25 16 33.921693817   18.54 18.28     ~ 28 0
8 [VV2006] J080620.5+504124 QSO 08 06 20.4801807485 +50 41 24.467168415   18.10 17.91     ~ 21 0
9 [VV2006] J083326.8+081552 QSO 08 33 26.8194371876 +08 15 51.974225727   18.41 18.16     ~ 22 0
10 [VV2006] J084525.9+072221 QSO 08 45 25.8444197156 +07 22 22.329698321   18.63 18.30     ~ 22 0
11 [VV2006] J084619.5+365836 QSO 08 46 19.5414981236 +36 58 36.756877565   18.37 18.26     ~ 20 0
12 [VV2006] J085045.5+563618 QSO 08 50 45.4441994428 +56 36 18.759998668   18.65 18.35     ~ 23 0
13 [VV2006] J085316.5+445616 QSO 08 53 16.5542068720 +44 56 16.562010243   18.76 18.49     ~ 21 0
14 [VV2006] J085417.6+532735 QSO 08 54 17.6113234302 +53 27 35.221686055   17.80 17.47     ~ 39 0
15 [VV2006] J085952.3+350724 QSO 08 59 52.3656383941 +35 07 24.757400761   18.64 18.53     ~ 19 0
16 [VV2006] J090938.7+041525 QSO 09 09 38.7096561488 +04 15 25.937325310   18.64 18.30     ~ 23 0
17 [VV2006] J092849.3+504930 QSO 09 28 49.2367852281 +50 49 30.568452905   18.56 18.36     ~ 23 0
18 [VV2006] J094942.3+052240 QSO 09 49 42.3388271099 +05 22 40.336193450   18.24 18.02     ~ 24 0
19 [VV2006] J100541.2+570544 QSO 10 05 41.2598187085 +57 05 44.595074319   18.44 18.27     ~ 22 0
20 [VV2006] J101120.4+031244 QSO 10 11 20.3980579798 +03 12 44.686668622   18.05 17.91     ~ 24 0
21 [VV2006] J102900.8+622341 QSO 10 29 00.8015613771 +62 23 41.902805073   18.28 18.03     ~ 22 0
22 [VV2006] J104321.5+624127 QSO 10 43 21.5613112312 +62 41 27.284722165   18.19 18.00     ~ 21 0
23 PB 697 QSO 10 53 15.9036077259 +40 07 56.413038077   18.66 18.47     ~ 23 0
24 [VV2006] J110411.6+024655 QSO 11 04 11.6313494108 +02 46 55.398975930   18.59 18.38     ~ 19 0
25 [VV2006] J110735.6+642008 QSO 11 07 35.5785797306 +64 20 08.669837557   17.75 17.53     ~ 19 0
26 [VV2006] J111928.5+130250 QSO 11 19 28.3791581707 +13 02 51.123505911   18.08 17.95     ~ 35 0
27 [VV2000] J113550.6+460705 QSO 11 35 50.6874300261 +46 07 05.111923639   18.18 18.00     ~ 22 0
28 [VV2006] J114311.6+651513 QSO 11 43 11.6114262640 +65 15 13.428151694   17.89 17.72     ~ 20 0
29 [VV2006] J114358.6+052445 QSO 11 43 58.5243926526 +05 24 45.056098821   17.55 17.27     ~ 22 0
30 [VV2006] J120729.7+042909 QSO 12 07 29.7566021926 +04 29 10.030386931   18.44 18.30     ~ 26 0
31 [VV2006] J121519.4+424850 QSO 12 15 19.4310788936 +42 48 51.045371895   18.11 18.00     ~ 22 0
32 [VV2006] J121944.8+461014 QSO 12 19 44.8039643170 +46 10 15.274305622   18.49 18.34     ~ 22 0
33 [VV2006] J122015.5+460802 QSO 12 20 15.5186939862 +46 08 02.442501014   18.42 18.32     ~ 22 0
34 [VV2006] J122836.0+510745 QSO 12 28 36.0585623768 +51 07 46.217663184   18.17 17.99     ~ 22 0
35 [VV2006] J123515.9+630113 QSO 12 35 15.8386917897 +63 01 13.379031582   17.81 17.58     ~ 23 0
36 [VV2006] J124831.6+580929 QSO 12 48 31.6580921435 +58 09 28.766174928   18.21 18.06     ~ 22 0
37 [VV2006] J125345.5+051611 QSO 12 53 45.4881805338 +05 16 11.179602019   18.42 18.18     ~ 22 0
38 [VV2006] J125914.8+672012 QSO 12 59 14.8448152227 +67 20 11.813172191   18.28 18.11     ~ 23 0
39 [VV2006] J130055.6+055620 QSO 13 00 55.6756214738 +05 56 20.622455254   18.29 18.12     ~ 23 0
40 [VV2006] J130240.1+025457 QSO 13 02 40.1717318365 +02 54 57.741084528   18.18 17.98     ~ 22 0
41 [VV2006] J131123.1+453159 QSO 13 11 23.0973251831 +45 31 59.383332410   18.71 18.56     ~ 19 0
42 [VV2006] J131855.8+531207 QSO 13 18 55.7509952089 +53 12 07.210793473   18.59 18.31     ~ 22 0
43 [VV2006] J132312.8+414933 QSO 13 23 12.8375037221 +41 49 33.131242398   18.57 18.40     ~ 18 0
44 [VV2006] J132552.2+663405 QSO 13 25 52.1787335039 +66 34 05.658498647   18.31 18.10     ~ 22 0
45 [VV2006] J133433.9+035545 QSO 13 34 33.8871096899 +03 55 45.185404020   18.37 18.26     ~ 23 0
46 QSO B1333+459 QSO 13 35 21.9625685328 +45 42 38.233185530   18.30 18.22 17.67   ~ 86 0
47 [VV2006] J133523.9+463742 QSO 13 35 23.8185928620 +46 37 42.204799196   18.41 18.25     ~ 19 0
48 LBQS 1334+0212 QSO 13 36 46.5615656950 +01 57 41.839334024   18.26 18.06     ~ 32 0
49 [VV96] J134211.9+601526 QSO 13 42 11.9682519529 +60 15 25.137328107   18.18 18.07     ~ 26 0
50 [VV2006] J135412.3+542100 QSO 13 54 12.2800421432 +54 21 00.183455852   18.55 18.34     ~ 21 0
51 [VV2006] J135445.6+002049 QSO 13 54 45.6654535386 +00 20 50.239276402   18.39 18.20     ~ 32 0
52 [VV2006] J135831.8+050522 QSO 13 58 31.7865092407 +05 05 22.767086514   17.57 17.33     ~ 26 0
53 [VV2006] J140028.9+643030 QSO 14 00 28.8187249788 +64 30 30.954681640   18.43 18.23     ~ 20 0
54 6C 141318+371936 QSO 14 15 28.4669603852 +37 06 21.162401903   18.12 17.94     ~ 62 1
55 [VV2006] J145453.6+032456 QSO 14 54 53.5308016646 +03 24 56.900019391   18.45 18.18     ~ 25 0
56 [VV2006] J145554.4+521828 QSO 14 55 54.3065858969 +52 18 28.630618715   18.25 18.06     ~ 23 0
57 [VV2006] J153335.8+384300 QSO 15 33 35.8163357974 +38 43 01.244803974   18.02 17.83     ~ 23 0
58 [VV98] J153514.8+483700 QSO 15 35 14.6531218958 +48 36 59.691976682   18.36 18.16     ~ 39 1
59 9C J1540+4138 BLL 15 40 42.9793931761 +41 38 16.327652682   17.94 17.68 16.72   ~ 37 1
60 [VV2006] J161003.5+442354 QSO 16 10 03.5390312874 +44 23 53.719779648   18.57 18.46     ~ 25 0
61 [VV2006] J161538.9+392051 QSO 16 15 38.8849322992 +39 20 51.177796279   18.64 18.45     ~ 19 0
62 [VV2000] J161815.5+370103 QSO 16 18 15.5325970507 +37 01 03.888166426   17.99 17.88     ~ 24 0
63 [VV2006] J162516.5+294318 QSO 16 25 16.4235082335 +29 43 18.387391006   18.26 18.08     ~ 23 0
64 QSO B1623+269 QSO 16 25 48.7980962644 +26 46 58.784817727   17.77 17.64     ~ 94 0
65 QSO J1651+4002 QSO 16 51 37.5264178863 +40 02 18.968451112   17.79 17.63     ~ 39 0
66 [VV2006] J165914.5+380900 QSO 16 59 14.5400567492 +38 09 00.769281679   18.40 18.26     ~ 22 0
67 [VV2006] J172409.2+531405 QSO 17 24 09.1984160522 +53 14 05.570156963   18.35 18.12     ~ 22 0
68 [VV2006] J211157.7+002457 QSO 21 11 57.7763697377 +00 24 57.528883161   18.18 17.96     ~ 25 0
69 [VV2006] J213629.5+102952 QSO 21 36 29.4447061535 +10 29 52.219856007   18.42 18.16     ~ 21 0
70 [VV2006] J230011.7-102144 QSO 23 00 11.7390093963 -10 21 44.459152214   18.69 18.47 18.50   ~ 31 1
71 [VV2006] J233823.2+150445 QSO 23 38 23.1630418956 +15 04 45.275805641   17.92 17.74     ~ 26 0

    Equat.    Gal    SGal    Ecl

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2019.10.18-04:49:05

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