2009A&A...508..133G


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.19CET16:46:14

2009A&A...508..133G - Astronomy and Astrophysics, volume 508, 133-140 (2009/12-2)

Damped and sub-damped Lyman-α absorbers in z > 4 QSOs.

GUIMARAES R., PETITJEAN P., DE CARVALHO R.R., DJORGOVSKI S.G., NOTERDAEME P., CASTRO S., POPPE P.C.R. and AGHAEE A.

Abstract (from CDS):

We present the results of a survey of damped (DLA, log N(HI)>20.3) and sub-damped Lyman-α systems (19.5<logN(HI)<20.3) at z>2.55 along the lines-of-sight to 77 quasars with emission redshifts in the range 4<zem<6.3. Intermediate resolution (R∼4300) spectra were obtained with the Echellette Spectrograph and Imager (ESI) mounted on the Keck telescope. A total of 100 systems with logN(HI)>19.5 were detected of which 40 systems are damped Lyman-α systems for an absorption length of ΔX=378. About half of the lines of sight of this homogeneous survey have never been investigated for DLAs. We study the evolution with redshift of the cosmological density of the neutral gas and find, consistent with previous studies at similar resolution, that ΩDLA,HI decreases at z>3.5. The overall cosmological evolution of ΩHI shows a peak around this redshift. The HI column density distribution for logN(HI)≥20.3 is fitted, consistent with previous surveys, with a single power-law of index α~-1.8±0.25. This power-law overpredicts data at the high-end and a second, much steeper, power-law (or a gamma function) is needed. There is a flattening of the function at lower HI column densities with an index of α~-1.4 for the column density range logN(HI)=19.5-21. The fraction of HI mass in sub-DLAs is of the order of 30%. The HI column density distribution does not evolve strongly from z∼2.5 to z∼4.5.

Abstract Copyright:

Journal keyword(s): Galaxy: evolution - Galaxy: formation - quasars: absorption lines - intergalactic medium - cosmology: observations

VizieR on-line data: <Available at CDS (J/A+A/508/133): table1.dat table2.dat>

Nomenclature: Table 2: [GPD2009] PSS JHHMM+DDMM abs N.NNN, [GPD2009] SDSS JHHMM+DDMM abs N.NNN, [GPD2009] BRI HHMM+DDMM abs N.NNN,[GPD2009] JHHMM+DDMM abs N.NNN, N=100

Simbad objects: 99

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Number of rows : 99

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 QSO J0007+2417 QSO 00 07 38.622 +24 17 24.85     18.69     ~ 13 0
2 [VV2006] J001442.8+303202 QSO 00 14 42.848 +30 32 03.20     18.81     ~ 6 0
3 [VV2006] J005206.8+240539 QSO 00 52 06.653 +24 05 37.43     18.87     ~ 7 1
4 QSO J0117+1552 QSO 01 17 31.072 +15 52 17.08     18.60     ~ 11 0
5 QSO J0118+0320 QSO 01 18 52.669 +03 20 50.00     18.50     ~ 7 0
6 QSO J0121+0347 QSO 01 21 26.1465867043 +03 47 06.754828139     17.90     ~ 25 0
7 QSO J0127-0045 QSO 01 27 00.6901952120 -00 45 59.150634975   19.95 18.95     ~ 47 0
8 QSO J0131+0633 QSO 01 31 12.197 +06 33 39.75     19.10     ~ 9 0
9 QSO J0133+0400 QSO 01 33 40.3272635087 +04 00 59.846288616     18.30     ~ 53 0
10 QSO J0134+3307 QSO 01 34 21.4860565338 +33 07 56.366707909     18.80     ~ 35 0
11 QSO J0206+1216 QSO 02 06 51.3711012695 +12 16 24.287307451     21.51     ~ 10 0
12 [VV2006] J020703.5+094059 QSO 02 07 03.4330667937 +09 40 59.414825801     18.70     ~ 4 0
13 QSO J0209+0517 QSO 02 09 44.6217446742 +05 17 13.724227644     17.80     ~ 45 0
14 QSO J0210-0018 QSO 02 10 43.1610494689 -00 18 18.482961149   23.49 21.97     ~ 55 0
15 QSO J0211-0009 QSO 02 11 02.7236747999 -00 09 10.339717238     22.00     ~ 38 0
16 [VV2006] J021120.1+110717 QSO 02 11 20.0372581442 +11 07 16.623725306     18.12     ~ 9 0
17 QSO J0231-0728 QSO 02 31 37.6463945454 -07 28 54.550661965   25.25 23.17     ~ 57 0
18 QSO J0244-0108 QSO 02 44 57.1857510010 -01 08 09.895925148   20.57 19.54     ~ 38 0
19 QSO J0248+1802 QSO 02 48 54.2714968293 +18 02 49.272478602     18.4     ~ 38 0
20 [VV2006] J032042.7+020816 QSO 03 20 42.6880829266 +02 08 15.688762623     18.50     ~ 4 0
21 QSO J0338+0021 QSO 03 38 29.3152522955 +00 21 56.242586538   25.10 23.26     ~ 88 0
22 QSO J0338+0018 QSO 03 38 30.022 +00 18 40.09     21.20     ~ 9 1
23 [VV2006] J045251.5+035558 QSO 04 52 51.5123575472 +03 55 57.822433850     18.80     ~ 7 0
24 QSO J0747+4434 QSO 07 47 49.7386102171 +44 34 17.085970425   22.88 21.15     ~ 51 0
25 QSO J0756+4104 QSO 07 56 18.139 +41 04 08.61   25.29 23.32     ~ 46 0
26 QSO B0805+5224 QSO 08 08 49.4244545735 +52 15 15.240544493   21.79 20.40     ~ 51 0
27 QSO J0810+4603 QSO 08 10 54.8774301951 +46 03 57.838506986   21.09 19.75     ~ 29 0
28 [VV2006] J085227.3+504510 QSO 08 52 27.2814823705 +50 45 10.791319591   20.95 19.80     ~ 25 0
29 [VV2006] J092636.3+305505 QSO 09 26 36.3318136090 +30 55 04.942592968     17.31     ~ 22 0
30 QSO J0941+5947 QSO 09 41 08.3616592488 +59 47 25.740380599   24.62 22.39     ~ 31 0
31 QSO J0947-0425 QSO 09 47 49.5684823009 -04 25 14.952237122     18.80     ~ 9 0
32 [VV2006] J095014.0+580136 QSO 09 50 14.0512838233 +58 01 36.526743134   19.70 18.56     ~ 32 0
33 QSO B0951-0450 QSO 09 53 55.7476659073 -05 04 18.957152606     19.0     ~ 54 0
34 [VV2006] J095511.3+594030 QSO 09 55 11.3296408259 +59 40 30.655386817   21.12 19.74     ~ 38 0
35 QSO B0957+33 QSO 09 57 44.4649748718 +33 08 20.768408496   20.70 19.42     ~ 55 0
36 QSO B1013+0035 QSO 10 15 49.0050307145 +00 20 20.015448963   22.25 20.79     ~ 60 0
37 [VV2006] J102656.6+382843 QSO 10 26 56.5974694386 +38 28 43.867116624   21.47 20.28     ~ 24 0
38 QSO B1033-033 QSO 10 36 23.7465725398 -03 43 18.918640366     18.5     ~ 64 0
39 [VV2006] J103919.3+344500 QSO 10 39 19.2761883585 +34 45 04.536734139   22.11 20.59     ~ 24 0
40 SDSS J104433.04-012502.0 QSO 10 44 33.044 -01 25 02.07     21.81     ~ 154 1
41 SDSS J104845.05+463718.3 QSO 10 48 45.058 +46 37 18.38   25.87 24.76     ~ 117 0
42 QSO J1048+4407 QSO 10 48 46.6282671152 +44 07 10.835796037   23.89 21.80     ~ 32 0
43 QSO J1057+4555 QSO 10 57 56.2613130231 +45 55 53.068171990   20.19 18.80 17.2 16.8 ~ 104 0
44 PSS J1058+1245 QSO 10 58 58.3799636949 +12 45 54.958204541     18.00     ~ 15 0
45 [VV2006] J111856.2+370200 QSO 11 18 56.1591526985 +37 02 55.908469867   21.60 20.27     ~ 25 1
46 [VV2006] J114008.7+620530 QSO 11 40 08.6704164331 +62 05 29.979728573   22.80 21.09     ~ 29 0
47 QSO J1159+1337 QSO 11 59 06.5237058914 +13 37 37.669759166   19.50 18.53     ~ 41 0
48 QSO J1204-0021 QSO 12 04 41.7301906901 -00 21 49.537434581   25.41 22.94     ~ 67 0
49 QSO J1208+0010 QSO 12 08 23.82 +00 10 27.8     20.79     ~ 31 0
50 [VV2006] J122623.9+095003 QSO 12 26 23.779 +09 50 04.13     18.78     ~ 6 0
51 QSO J1248+3110 QSO 12 48 20.2085578544 +31 10 43.309490519   22.27 21.06     ~ 34 0
52 QSO B1247+3406 QSO 12 49 42.1275066946 +33 49 53.848394682     20.4     ~ 49 0
53 QSO J1253-0228 QSO 12 53 36.3533107417 -02 28 07.746363785     18.80     ~ 34 0
54 [VV2000] J131052.5-005533 QSO 13 10 52.5120331394 -00 55 33.130035703   21.31 19.95     ~ 36 0
55 [VV2006] J131539.6+292440 QSO 13 15 40.021 +29 24 35.29   20.35 20.02     ~ 8 0
56 QSO J1317+3531 QSO 13 17 43.1305453446 +35 31 31.957913299   22.58 20.95     ~ 35 0
57 [VV2006] J132512.5+112330 QSO 13 25 12.4930213164 +11 23 29.842170302   22.66 20.95     ~ 46 0
58 [VV2006] J132611.9+074358 QSO 13 26 11.8504698975 +07 43 58.369927376   20.25 18.96     ~ 39 0
59 [VV2006] J133913.0+515404 QSO 13 39 12.9505642517 +51 54 03.699715816   20.84 19.80     ~ 24 0
60 [VV2006] J134743.3+495622 QSO 13 47 43.2945969579 +49 56 21.242107518   20.59 19.26     ~ 46 0
61 [VV2006] J140132.8+411150 QSO 14 01 32.7576312100 +41 11 50.518230586   21.54 20.28     ~ 26 0
62 [VV2006] J140355.7+412617 QSO 14 03 55.6856149904 +41 26 17.182975934   21.36 20.34     ~ 23 0
63 [VV2006] J141831.7+444937 QSO 14 18 31.6978839665 +44 49 37.506602460   21.46 20.11     ~ 28 0
64 QSO J1430+2828 QSO 14 30 31.6181875439 +28 28 31.479715596   22.36 20.84     ~ 24 0
65 QSO J1432+3940 QSO 14 32 24.7688922429 +39 40 24.549000857   23.01 21.19     ~ 40 0
66 QSO J1435+3057 QSO 14 35 23.4197546784 +30 57 21.990892142   21.86 20.51     ~ 33 0
67 QSO J1443+2724 QSO 14 43 31.1702656971 +27 24 36.772847043     19.3     ~ 77 0
68 [VV2006] J144340.7+585653 QSO 14 43 40.7002505123 +58 56 53.246258115   20.45 19.22     ~ 31 0
69 [VV2006] J145833.4+681321 QSO 14 58 33.3300049452 +68 13 22.085324129     18.37     ~ 4 0
70 [VV2006] J150007.7+582937 QSO 15 00 07.673 +58 29 37.47     18.60     ~ 5 0
71 QSO J1506+5220 QSO 15 06 54.5500668499 +52 20 04.740607965   21.72 20.14     ~ 50 0
72 QSO B1508+572 QSO 15 10 02.92236464 +57 02 43.3759071   22.73 21.38 19.23   ~ 161 0
73 [VV2006] J153129.9+451708 QSO 15 31 29.9137994458 +45 17 07.751948992   22.65 21.42     ~ 20 0
74 QSO J1535+2943 QSO 15 35 53.8008734205 +29 43 13.683545114   22.17 20.48     ~ 31 0
75 [VV2006] J154340.3+341744 QSO 15 43 40.3821654286 +34 17 44.460129574   22.39 20.38     ~ 24 0
76 [VV2006] J155409.9+183551 QSO 15 54 09.8384905765 +18 35 50.459134892     19.00     ~ 18 0
77 [VV2006] J155502.6+200324 QSO 15 55 02.5462988707 +20 03 25.161719829     18.90     ~ 18 0
78 [VV2006] J161522.9+180356 QSO 16 15 22.8566321304 +18 03 56.312073342     18.42     ~ 14 0
79 SDSS J163033.89+401209.6 QSO 16 30 33.898 +40 12 09.68   26.45 25.01     ~ 65 0
80 QSO J1633+1411 QSO 16 33 19.6288689974 +14 11 42.107931343   21.64 20.28     ~ 34 0
81 QSO J1646+5514 QSO 16 46 56.3883974399 +55 14 46.129590829     18.10     ~ 25 0
82 [VV2000] J171356.1+421808 QSO 17 13 56.1503579397 +42 18 08.550776995   23.19 21.12     ~ 8 0
83 QSO J1715+3809 QSO 17 15 39.4548701008 +38 09 09.915894657     18.56     ~ 16 1
84 QSO J1721+3256 QSO 17 21 06.6394280970 +32 56 36.225434215     19.20     ~ 23 0
85 QSO J1723+2243 QSO 17 23 23.1074963445 +22 43 57.141061166     18.17     ~ 29 0
86 QSO J1737+5828 QSO 17 37 44.8801064223 +58 28 29.612406771   25.47 22.95     ~ 46 0
87 [VV2006] J174550.1+684621 QSO 17 45 50.1507383360 +68 46 21.272203875     19.12     ~ 7 0
88 QSO J1802+5616 QSO 18 02 48.8360840691 +56 16 50.440929868     18.30     ~ 23 0
89 QSO J2122-0014 QSO 21 22 07.3626989206 -00 14 45.620743081   21.76 20.43     ~ 35 0
90 QSO J2154+0335 QSO 21 54 06.724 +03 35 40.19     19.00     ~ 13 0
91 QSO J2155+1358 QSO 21 55 01.998 +13 58 25.64     18.00     ~ 42 0
92 [VV2006] J220343.4+182813 QSO 22 03 43.330 +18 28 13.53     18.74     ~ 6 0
93 [VV2006] J223841.1+260346 QSO 22 38 41.6035138334 +26 03 45.393255826     18.85     ~ 6 0
94 QSO J2241+1352 QSO 22 41 47.7595363207 +13 52 02.750370029   22.20 20.66     ~ 46 0
95 [VV2006] J224405.5+104738 QSO 22 44 05.3914272559 +10 47 37.883722083     18.92     ~ 6 0
96 QSO J2315+0921 QSO 23 15 59.125 +09 21 43.23     19.10     ~ 13 0
97 QSO J2322+1944 QSO 23 22 07.164 +19 44 22.98     18.29     ~ 71 0
98 QSO J2323+2758 QSO 23 23 40.898 +27 58 01.18     18.51     ~ 16 0
99 QSO J2344+0342 QSO 23 44 03.109 +03 42 26.73     18.20     ~ 38 0

    Equat.    Gal    SGal    Ecl

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2021.01.19-16:46:14

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