2017A&A...608A..84C


Query : 2017A&A...608A..84C

2017A&A...608A..84C - Astronomy and Astrophysics, volume 608A, 84-84 (2017/12-1)

Solving the conundrum of intervening strong Mg II absorbers towards gamma-ray bursts and quasars.

CHRISTENSEN L., VERGANI S.D., SCHULZE S., ANNAU N., SELSING J., FYNBO J.P.U., DE UGARTE POSTIGO A., CANAMERAS R., LOPEZ S., PASSI D., CORTES-ZULETA P., ELLISON S.L., D'ODORICO V., BECKER G., BERG T.A.M., CANO Z., COVINO S., CUPANI G., D'ELIA V., GOLDONI P., GOMBOC A., HAMMER F., HEINTZ K.E., JAKOBSSON P., JAPELJ J., KAPER L., MALESANI D., MOLLER P., PETITJEAN P., PUGLIESE V., SANCHEZ-RAMIREZ R., TANVIR N.R., THONE C.C., VESTERGAARD M., WIERSEMA K. and WORSECK G.

Abstract (from CDS):

Previous studies have shown that the incidence rate of intervening strong MgII absorbers towards gamma-ray bursts (GRBs) were a factor of 2-4 higher than towards quasars. Exploring the similar sized and uniformly selected legacy data sets XQ-100 and XSGRB, each consisting of 100 quasar and 81 GRB afterglow spectra obtained with a single instrument (VLT/X-shooter), we demonstrate that there is no disagreement in the number density of strong MgII absorbers with rest-frame equivalent widths Wr(lambda2796)>1Å towardsGRBs and quasars in the redshift range 0.1≤z≤5. With large and similar sample sizes, and path length coverages of Δz=57.8 and 254.4 for GRBs and quasars, respectively, the incidences of intervening absorbers are consistent within 1σ uncertainty levels at all redshifts. For absorbers at z<2.3, the incidence towards GRBs is a factor of 1.5±0.4 higher than the expected number of strong MgII absorbers in Sloan Digital Sky Survey (SDSS) quasar spectra, while for quasar absorbers observed with X-shooter we find an excess factor of 1.4±0.2 relative to SDSS quasars. Conversely, the incidence rates agree at all redshifts with reported high-spectral-resolution quasar data, and no excess is found. The only remaining discrepancy in incidences is between SDSS MgII catalogues and high-spectral-resolution studies. The rest-frame equivalent-width distribution also agrees to within 1σ uncertainty levels between the GRB and quasar samples. Intervening strong MgII absorbers towards GRBs are therefore neither unusually frequent, nor unusually strong.

Abstract Copyright: © ESO, 2017

Journal keyword(s): quasars: absorption lines - gamma rays: general - galaxies: halos - galaxies: halos

CDS comments: Table A.1 Some QSO not identified.

Simbad objects: 87

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Number of rows : 87
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 QSO J0003-2603 QSO 00 03 22.9531962024 -26 03 18.304471908   18 17.53     ~ 278 0
2 QSO J0006-6208 QSO 00 06 51.6236518800 -62 08 03.569781336     18.29     ~ 35 0
3 QSO B0032+1622 QSO 00 34 54.6003906960 +16 39 20.658857256   21.1 19.50 18.7   ~ 21 0
4 QSO J0042-1020 QSO 00 42 19.7442706968 -10 20 09.572952948   20.57 19.53     ~ 30 0
5 QSO J0056-2808 QSO 00 56 25.0852890048 -28 08 32.246023452     18.24     ~ 49 0
6 QSO J0100-2708 QSO 01 00 12.3140516496 -27 08 53.086023960   18.74 17.80     ~ 14 0
7 QSO B0111-2819 QSO 01 13 44.3844522888 -28 03 17.403981300     18.67     ~ 14 0
8 QSO J0117+1552 QSO 01 17 31.0833164376 +15 52 17.013382248     18.60     ~ 12 0
9 QSO J0124+0044 QSO 01 24 03.7793700432 +00 44 32.745561900   19.71 18.71 17.9   ~ 85 0
10 QSO B0135-42 QSO 01 37 24.3934534824 -42 24 17.145923688     18.46     ~ 21 0
11 GRB 100901A gB 01 49 03.56 +22 45 30.6           ~ 141 0
12 QSO B0151-00 QSO 01 53 39.6078379368 -00 11 04.929367704   21.73 20.12     ~ 61 0
13 QSO J0211+1107 QSO 02 11 20.0369218272 +11 07 16.619669508     18.12     ~ 10 0
14 QSO J0234-1806 QSO 02 34 55.1545222416 -18 06 08.595991548     18.79     ~ 19 0
15 QSO B0241-01 QSO 02 44 01.8451874040 -01 34 03.848758680     18.20     ~ 47 0
16 QSO B0245-0608 QSO 02 47 56.5751683632 -05 55 58.779041160     18.60     ~ 18 0
17 QSO J0255+0048 QSO 02 55 18.5784341184 +00 48 47.540744316   21.15 20.00     ~ 70 0
18 QSO J0307-4945 QSO 03 07 22.8949808808 -49 45 48.274545240     18.76     ~ 54 0
19 QSO J0311-1722 QSO 03 11 15.2117927712 -17 22 47.669854188     17.73     ~ 28 0
20 GRB 111008A gB 04 01 48.220 -32 42 34.09           ~ 91 0
21 GRB 121027A gB 04 14 23.450 -58 49 47.17           ~ 107 0
22 QSO J0415-4357 QSO 04 15 15.1808225472 -43 57 52.947818244     18.81     ~ 14 0
23 GRB 121024A gB 04 41 53.30 -12 17 26.0           ~ 101 0
24 QSO J0529-3526 QSO 05 29 15.9124930752 -35 26 03.550280604     18.94     ~ 11 0
25 QSO J0747+2739 QSO 07 47 11.1466907592 +27 39 03.365989812     17.20     ~ 60 0
26 GRB 120119A gB 08 00 06.940 -09 04 53.83           ~ 136 0
27 SDSS J081855.78+095848.0 QSO 08 18 55.7827140888 +09 58 47.995294728   19.71 18.81     ~ 32 0
28 QSO J0833+0959 QSO 08 33 22.4989675248 +09 59 41.202402252   20.33 19.59     ~ 29 0
29 QSO J0835+0650 QSO 08 35 10.9218543888 +06 50 52.822332492   20.40 19.43     ~ 29 0
30 GRB 111107A gB 08 37 54.66 -66 31 12.3           ~ 71 0
31 QSO J0839+0318 QSO 08 39 41.4494507976 +03 18 17.096263560   21.62 20.10     ~ 28 0
32 GRB 130408A gB 08 57 37.30 -32 21 38.9           ~ 67 0
33 QSO J0920+0725 QSO 09 20 41.7620878440 +07 25 44.069595420   20.01 19.28     ~ 31 0
34 QSO J0935+0022 QSO 09 35 56.9191378176 +00 22 55.681297716   20.26 19.37     ~ 36 0
35 QSO J0937+0828 QSO 09 37 14.4853902864 +08 28 58.543420404   20.50 19.61     ~ 33 0
36 GRB 141109A gB 09 38 07.40 -00 36 28.6           ~ 46 0
37 QSO B0952-0115 QSO 09 55 00.1037541106 -01 30 06.549307797     18.7     ~ 132 0
38 QSO J0959+1312 QSO 09 59 37.1146924200 +13 12 15.467765616   19.65 18.55     ~ 39 0
39 GRB 100219A gB 10 16 48.46 -12 34 00.2           ~ 100 0
40 QSO J1020+0922 QSO 10 20 40.6230869016 +09 22 54.238672668   19.94 19.20     ~ 38 0
41 QSO J1032+0927 QSO 10 32 21.1157309496 +09 27 49.002473052   20.72 19.75     ~ 29 0
42 QSO J1034+1102 QSO 10 34 46.5347918856 +11 02 14.587007532   21.08 20.01     ~ 28 0
43 QSO J1042+1957 QSO 10 42 34.0099089360 +19 57 18.618440040   19.80 19.07     ~ 18 0
44 GRB 160203A gB 10 47 48.31 -24 47 20.5           ~ 33 0
45 GRB 100316B gB 10 54 00 -45 28.0           ~ 47 0
46 QSO J1054+0215 QSO 10 54 34.1744480256 +02 15 52.001921628   20.83 19.68     ~ 26 0
47 SDSS J105705.37+191042.8 QSO 10 57 05.3733759528 +19 10 42.850923744   20.93 19.74     ~ 23 0
48 PSS J1058+1245 QSO 10 58 58.3817012496 +12 45 54.925620408     18.00     ~ 16 0
49 QSO J1103+1004 QSO 11 03 52.7442282696 +10 04 03.182969352   20.45 19.58     ~ 31 0
50 SDSS J110855.46+120953.3 QSO 11 08 55.4652728904 +12 09 53.344550916   20.81 19.72     ~ 41 0
51 QSO J1110+0244 QSO 11 10 08.6149313520 +02 44 58.123439448   20.05 19.05     ~ 32 0
52 QSO B1108-07 QSO 11 11 13.600 -08 04 02.00     18.10     ~ 67 0
53 GRB 120712A gB 11 18 21.21 -20 02 01.9           ~ 58 0
54 QSO B1159+123 QSO 12 01 47.9118521640 +12 06 30.253926276   18.85 18.16     ~ 96 0
55 QSO J1202-0054 QSO 12 02 10.0843154832 -00 54 25.567831008   20.44 19.60     ~ 33 0
56 GRB 121229A gB 12 40 23.41 -50 35 37.2           ~ 44 0
57 QSO J1249-0159 QSO 12 49 57.2390828736 -01 59 28.777376220   18.93 18.19     ~ 49 0
58 QSO J1304+0239 QSO 13 04 52.5787092048 +02 39 24.958302228   19.86 19.02     ~ 34 0
59 SDSS J131242.86+084105.0 QSO 13 12 42.8679333912 +08 41 05.098313040   20.27 19.42     ~ 26 0
60 GRB 090313 gB 13 13 36.00 +08 05 10.7           ~ 125 0
61 QSO J1320-0523 QSO 13 20 29.9690800824 -05 23 35.374439220   18.1 16.54     ~ 29 0
62 QSO J1323+1405 QSO 13 23 46.0565175792 +14 05 17.601150732   20.85 19.90     ~ 19 0
63 QSO J1330-2522 QSO 13 30 51.9940221240 -25 22 19.040423412     18.46     ~ 14 0
64 QSO J1331+1015 QSO 13 31 50.6979853416 +10 15 29.504637648   20.46 19.55     ~ 17 0
65 QSO J1352+1303 QSO 13 52 47.9803855272 +13 03 11.580795900   19.73 19.02     ~ 20 0
66 QSO J1416+1811 QSO 14 16 08.3885367120 +18 11 44.021280876   20.47 19.67     ~ 17 0
67 QSO J1442+0920 QSO 14 42 50.1217881840 +09 20 01.530811752   18.73 18.14     ~ 32 0
68 QSO J1524+2123 QSO 15 24 36.0827330112 +21 23 09.151306476   19.30 18.58     ~ 23 0
69 GRB 140614A gB 15 24 40.69 -79 07 43.8           ~ 28 0
70 QSO J1542+0955 QSO 15 42 37.7111267496 +09 55 58.892093652   21.01 19.93     ~ 18 0
71 GRB 060418 gB 15 45 42.600 -03 38 20.00 15.73 16.19 14.98     ~ 341 0
72 SDSS J155255.04+100538.3 QSO 15 52 55.0453432176 +10 05 38.288551344   20.64 19.75     ~ 19 0
73 QSO B1618-0035 QSO 16 21 16.9228185456 -00 42 50.909201856   18.92 17.97     ~ 69 0
74 QSO J1633+1411 QSO 16 33 19.6287438288 +14 11 42.103797792   21.64 20.28     ~ 37 0
75 GRB 130606A gB 16 37 35.12 +29 47 46.4           ~ 133 0
76 QSO J1723+2243 QSO 17 23 23.1074068680 +22 43 57.140264100     18.17     ~ 31 0
77 GRB 120815A gB 18 15 54.40 -52 07 29.0           ~ 76 0
78 GRB 161023A gB 20 44 05.20 -47 39 48.5           ~ 32 0
79 GRB 150403A gB 20 46 01.17 -62 42 40.4           ~ 64 0
80 GRB 141028A gB 21 30 24.48 -00 13 55.3           ~ 74 0
81 QSO J2215-1611 QSO 22 15 27.2920172928 -16 11 33.057278052     18.10     ~ 45 0
82 QSO J2216-6714 QSO 22 16 52.0188194640 -67 14 43.661954400     18.06     ~ 17 0
83 GRB 151021A gB 22 30 34.43 -33 11 50.3           ~ 45 0
84 QSO B2248-1244 QSO 22 51 18.1049437608 -12 27 03.295641708     18.5     ~ 22 0
85 GRB 131030A gB 23 00 16.14 -05 22 05.2           ~ 89 0
86 QSO J2344+0342 QSO 23 44 03.1101598920 +03 42 26.725817304     18.20     ~ 39 0
87 QSO J2349-3712 QSO 23 49 13.7825429232 -37 12 59.310558144     18.69     ~ 17 0

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2022.05.27-07:45:09

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