2007A&A...473..791F


Query : 2007A&A...473..791F

2007A&A...473..791F - Astronomy and Astrophysics, volume 473, 791-803 (2007/10-3)

C IV absorption in damped and sub-damped Lyman-α systems. Correlations with metallicity and implications for galactic winds at z≃2-3.

FOX A.J., LEDOUX C., PETITJEAN P. and SRIANAND R.

Abstract (from CDS):

We present a study of CIV absorption in a sample of 63 damped Lyman-α (DLA) systems and 11 sub-DLAs in the redshift range 1.75<zabs<3.61, using a dataset of high-resolution (6.6km/s FWHM), high signal-to-noise VLT/UVES spectra. The complex absorption line profiles show both narrow and broad CIV components, indicating the presence of both warm, photoionized and hot, collisionally ionized gas. We report new correlations between the metallicity (measured in the neutral-phase) and each of the CIV column density, the CIV total line width, and the maximum CIV velocity. We explore the effect on these correlations of the sub-DLAs, the proximate DLAs (defined as those within 5000km/s of the quasar), the saturated absorbers, and the metal line used to measure the metallicity, and we find the correlations to be robust. There is no evidence for any difference between the measured properties of DLA CIV and sub-DLA CIV. In 25 DLAs and 4 sub-DLAs, covering 2.5dex in [Z/H], we directly observe CIV moving above the escape speed, where vesc is derived from the total line width of the neutral gas profiles. These high-velocity CIV clouds, unbound from the central potential well, can be interpreted as highly ionized outflowing winds, which are predicted by numerical simulations of galaxy feedback. The distribution of CIV column density in DLAs and sub-DLAs is similar to the distribution in Lyman Break galaxies, where winds are directly observed, supporting the idea that supernova feedback creates the ionized gas in DLAs. The unbound CIV absorbers show a median mass flow rate of ∼22(r/40kpc)M/yr, where r is the characteristic CIV radius. Their kinetic energy fluxes are large enough that a star formation rate (SFR) of ∼2M/yr is required to power them.

Abstract Copyright:

Journal keyword(s): galaxies: quasars: absorption lines - galaxies: high-redshift - galaxies: halos - galaxies: ISM - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/473/791): position.dat table1.dat>

Simbad objects: 64

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Number of rows : 64
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 LBQS 2359-0216B QSO 00 01 49.9509602856 -01 59 39.455306448   18 18.0     ~ 102 0
2 LBQS 0010-0012 QSO 00 13 06.1519752552 +00 04 31.948605732   19.29 19.05     ~ 91 0
3 LBQS 0013-0029 QSO 00 16 02.4050159808 -00 12 25.077257064   18.67 18.36     ~ 186 0
4 QSO B0027-1836 QSO 00 30 23.6259434280 -18 19 56.117225244   18.2 17.9     ~ 47 0
5 [VV98] J004139.1-333436 QSO 00 41 39.10 -33 34 36.0     20.10     ~ 4 0
6 LBQS 0042-2930 QSO 00 45 08.5282842672 -29 14 32.499502620   17.92       ~ 28 0
7 LBQS 0049-2820 QSO 00 51 27.1928384280 -28 04 33.966262488     18.1     ~ 43 0
8 QSO B0058-292 QSO 01 01 04.6496114136 -28 58 01.682742576     18.7     ~ 40 0
9 QSO J0105-1846 QSO 01 05 16.7912097864 -18 46 41.986634736     18.3     ~ 75 0
10 QSO B0112+03 QSO 01 14 53.2286036664 +03 14 56.953353696     18.6     ~ 58 2
11 QSO B0112-30 QSO 01 15 04.8742901280 -30 25 14.952952308           ~ 46 1
12 QSO J0137-2707 QSO 01 37 54.5560896408 -27 07 36.616431864   18.6       ~ 21 0
13 QSO B0216+0803 QSO 02 18 57.3582544488 +08 17 27.346030260     18.1     ~ 89 0
14 QSO B0254-404 QSO 02 56 34.0345534368 -40 13 00.403326228     17.4     ~ 32 0
15 QSO B0300-3152 QSO 03 02 11.3270286552 -31 40 30.385641576   17.7       ~ 14 0
16 QSO J0332-4455 BLL 03 32 44.1067317744 -44 55 57.307691460   17.9 17.9     ~ 26 0
17 QSO B0347-383 QSO 03 49 43.6603590912 -38 10 30.825444900     17.3     ~ 187 0
18 QSO J0407-4410 QSO 04 07 18.0880236912 -44 10 13.983623724   17.6 17.6     ~ 93 0
19 QSO B0421-2624 QSO 04 23 53.9629367304 -26 18 01.098294768     18.1     ~ 15 0
20 QSO B0425-5214 QSO 04 26 44.5187583816 -52 08 19.796703972   17.8 17.8     ~ 14 0
21 QSO B0438-43 QSO 04 40 17.1802492608 -43 33 08.606287872   19.31 19.5 18.2   ~ 267 2
22 4C -02.19 QSO 05 01 12.8099394264 -01 59 14.258630148   19.1 18.4 19.04   ~ 544 1
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15990 1
24 QSO B0528-2505 QSO 05 30 07.9627395840 -25 03 29.900044512   18.17 17.34 17.7   ~ 409 0
25 QSO B0551-36 QSO 05 52 46.1824785360 -36 37 27.608212524   17.72 17.57     ~ 89 0
26 QSO B0642-5038 QSO 06 43 27.0080170248 -50 41 12.811001244     18.5     ~ 42 0
27 QSO B0841+129 BLL 08 44 24.2445546984 +12 45 46.526286780   18.28 18.5     ~ 112 0
28 QSO B0913+0715 QSO 09 16 13.9618240848 +07 02 24.497778588     17.1     ~ 100 0
29 QSO B1036-2257 QSO 10 39 09.5068714968 -23 13 26.396602392   18.0 18.0     ~ 42 0
30 QSO J1039-2719 QSO 10 39 21.8517992640 -27 19 16.435341732     17.4     ~ 88 0
31 QSO B1108-07 QSO 11 11 13.600 -08 04 02.00     18.10     ~ 67 0
32 QSO J1113-1533 QSO 11 13 50.6122921416 -15 33 34.005990672   18.7 18.7     ~ 34 0
33 QSO B1117-1329 QSO 11 20 10.3163354592 -13 46 25.946998500     18.00     ~ 52 0
34 QSO B1157+014 QSO 11 59 44.8278142392 +01 12 06.985999764   17.87 17.52     ~ 210 1
35 [VV2006] J120550.2+020131 QSO 12 05 50.1929486760 +02 01 31.583140248   17.82 17.43     ~ 33 0
36 QSO B1209+0919 QSO 12 11 34.9526605296 +09 02 20.852132964   19.61 19.15     ~ 97 0
37 QSO B1220-1800 QSO 12 23 10.6133866272 -18 16 42.435376356   18.1 18.1     ~ 14 0
38 LBQS 1223+1753 QSO 12 26 07.1946195816 +17 36 49.921603812   18.93 18.59     ~ 107 0
39 LBQS 1232+0815 QSO 12 34 37.5514444464 +07 58 43.367750796     18.4     ~ 119 0
40 LBQS 1242+0006 QSO 12 45 24.5992660656 -00 09 38.017515636   18.30 18.08     ~ 66 0
41 QSO B1331+170 QSO 13 33 35.7827544072 +16 49 04.013500728   16.84 16.71 16.41   ~ 426 0
42 QSO B1337+11 QSO 13 40 02.5419344664 +11 06 30.181521168     18.7     ~ 110 0
43 QSO J1342-1355 QSO 13 42 58.8724541136 -13 55 59.812504788   19.2 19.2     ~ 23 0
44 QSO B1409+0930 QSO 14 12 17.2929417480 +09 16 24.707943048     18.6     ~ 60 0
45 LBQS 1444+0126 QSO 14 46 53.0501441856 +01 13 55.924449276   18.71 18.38     ~ 64 0
46 QSO B1451+123 QSO 14 54 18.5811696336 +12 10 53.897535696     18.6     ~ 79 0
47 NAME MS 1512-cB58 AGN 15 14 22.2751 +36 36 25.674     20.64   20.35 ~ 321 0
48 CNOC MS 1512 101094 G 15 14 22.482 +36 36 21.08           ~ 146 1
49 QSO B2059-360 QSO 21 02 44.6068720464 -35 53 07.081042308   19.18 18.62     ~ 54 0
50 QSO J2119-3536 QSO 21 19 27.6059083752 -35 37 40.547708544   17.50 17.35     ~ 41 0
51 LBQS 2138-4427 QSO 21 41 59.5007724552 -44 13 25.930211268   19.17 18.20     ~ 63 1
52 QSO J2155+1358 QSO 21 55 02.0017063296 +13 58 25.712205816     18.00     ~ 43 0
53 LBQS 2206-1958A QSO 22 08 52.0729138920 -19 43 59.866776948   17.49 17.33     ~ 209 0
54 QSO B2206-1959 QSO 22 09 00.6950774976 -19 44 19.743416484     18.65     ~ 82 0
55 QSO B2222-396 QSO 22 25 40.4396409888 -39 24 36.652870116     17.9     ~ 30 0
56 QSO B2228-399 QSO 22 31 35.3063849208 -39 38 54.315382236     18.3     ~ 21 0
57 QSO J2246-6015 QSO 22 47 08.9258659440 -60 15 45.299400480           ~ 65 0
58 QSO B2311-373 QSO 23 13 59.7082094616 -37 04 46.215225516   19.0 18.5 19.05   ~ 40 1
59 QSO B2314-409 QSO 23 16 46.9200325176 -40 41 21.090064236   17.9 17.9     ~ 65 1
60 QSO B2318-1107 QSO 23 21 28.6902031608 -10 51 22.515901344           ~ 16 0
61 QSO B2332-094 QSO 23 34 46.4045250120 -09 08 12.250650732   19.21 18.62 18.07   ~ 76 0
62 QSO B2343+125 QSO 23 46 28.200 +12 49 00.00     17.5     ~ 131 2
63 QSO B2344+125 QSO 23 46 32.80 +12 45 40.0     17.0     ~ 82 1
64 QSO B2348-0108 QSO 23 50 57.8771296800 -00 52 09.886281492   19.23 18.77 18.7   ~ 141 0

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2022.05.23-03:32:57

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