2012ApJ...754...38C

Query : 2012ApJ...754...38C

2012ApJ...754...38C - Astrophys. J., 754, 38 (2012/July-3)

Incidence of Mg II absorption systems toward flat-spectrum radio quasars.

CHAND H. and GOPAL-KRISHNA

Abstract (from CDS):

The conventional wisdom that the rate of incidence of Mg II absorption systems, dN/dz (excluding "associated systems" having a velocity βc relative to the active galactic nucleus (AGN) of less than ∼5000 km/s), is totally independent of the background AGNs has been challenged by a recent finding that dN/dz for strong Mg II absorption systems toward distant blazars is 2.2±0.80.6 times the value known for normal optically selected quasars (QSOs). This has led to the suggestion that a significant fraction of even the absorption systems with β as high as ∼0.1 may have been ejected by the relativistic jets in the blazars, which are expected to be pointed close to our direction. Here, we investigate this scenario using a large sample of 115 flat-spectrum radio-loud quasars (FSRQs) that also possess powerful jets, but are only weakly polarized. We show, for the first time, that dN/dz toward FSRQs is, on the whole, quite similar to that known for QSOs and that the comparative excess of strong Mg II absorption systems seen toward blazars is mainly confined to β < 0.15. The excess relative to FSRQs probably results from a likely closer alignment of blazar jets with our direction; hence, any gas clouds accelerated by them are more likely to be on the line of sight to the active quasar nucleus.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: general - galaxies: jets - intergalactic medium - quasars: absorption lines - quasars: general - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/754/38): table2.dat table3.dat>

Simbad objects: 118

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Number of rows : 118
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B0008+006 QSO 00 11 30.5604085176 +00 55 50.779581204   19.43 19.10     ~ 50 0
2 LBQS 0013-0029 QSO 00 16 02.4050159808 -00 12 25.077257064   18.67 18.36     ~ 198 0
3 6C 001403+811827 BLL 00 17 08.47489694 +81 35 08.1365094   17.60 16.52 15.95   ~ 405 1
4 4C -02.04 Bla 00 40 57.6113680704 -01 46 32.027603772   18.5 18.00 18.38   ~ 108 1
5 QSO B0039-407 Bla 00 42 01.2251121648 -40 30 39.739745232   18.5 18.5 19.3   ~ 32 1
6 QSO B0048-071 BLL 00 51 08.20982093 -06 50 02.2292452   19.0 19.5 19.07   ~ 146 1
7 QSO B0104-2734 Bla 01 06 26.0819282208 -27 18 11.825299296   18.5 19.0 18.61   ~ 54 1
8 QSO B0112-0142 Bla 01 15 17.09995153 -01 27 04.5772562   17 17.235 17.81   ~ 233 1
9 QSO J0125-0006 Bla 01 25 28.8438355224 -00 05 55.930595964   16.92 16.64 16.30   ~ 305 1
10 QSO B0130-17 Bla 01 32 43.48746292 -16 54 48.5220804   18.75 18.44 15.44   ~ 247 1
11 QSO B0135-2446 Bla 01 37 38.3462810880 -24 30 53.883832500   17.47 17.33 16.57   ~ 222 1
12 [VV2006] J013851.9-054008 Bla 01 38 51.85124343 -05 40 08.2427991     20.0 20.3   ~ 24 1
13 QSO B0136-231 Bla 01 38 57.4657042440 -22 54 47.330166204   18.4 18.0 17.6   ~ 63 1
14 QSO B0153+744 BLL 01 57 34.9650498168 +74 42 43.225049844   16 16.0 16.7   ~ 217 1
15 7C 020156.39+363507.00 QSO 02 04 55.5959081688 +36 49 17.992097868     18.1     ~ 127 1
16 QSO B0223+1120 QSO 02 25 41.90988212 +11 34 25.4650327   17.9 18 18.3   ~ 33 1
17 4C -03.07 Bla 02 28 53.2110624600 -03 37 37.123953384   17.03 16.96 16.8   ~ 162 1
18 QSO B0227-369 Bla 02 29 28.44905708 -36 43 56.8223412     19.0 20.4   ~ 113 1
19 QSO B0234-301 Bla 02 36 31.16941522 -29 53 55.5405598   18.63 18 18.2   ~ 55 1
20 QSO B0237-2322 QSO 02 40 08.1743783856 -23 09 15.729012036   16.78 16.63     ~ 516 1
21 QSO B0240-060 Bla 02 43 12.46947413 -05 50 55.2953784   18.2 19.0 19.11   ~ 67 1
22 QSO B0244-128 BLL 02 46 58.4699862120 -12 36 30.796050528   18.5 18.4 18.28   ~ 64 1
23 QSO B0254-334A Bla 02 56 42.60273236 -33 15 21.2773081     17 19.55   ~ 59 1
24 CGRaBS J0259-0018 Bz? 02 59 28.51 -00 18 00.0           ~ 6 0
25 QSO B0325-222 Bla 03 27 59.9241522288 -22 02 06.403060356   18.99 19.0 19.22   ~ 44 1
26 QSO B0329-385 QSO 03 31 06.3780612048 -38 24 04.653443772   17.63 16.92     ~ 85 1
27 PHL 4444 Bla 03 31 08.9205317376 -25 24 43.266541032   17.82 17.51 18.2   ~ 107 1
28 QSO J0403-3605 Bla 04 03 53.74990003 -36 05 01.9131880   17.04 17.17 16.67   ~ 313 1
29 QSO J0422-3844 BLL 04 22 14.7829521792 -38 44 52.826059032   17.70 16.92 16.3   ~ 203 2
30 QSO B0420+022 BLL 04 22 52.21465085 +02 19 26.9307480     19.5 19.41   ~ 115 1
31 QSO B0421+019 Bla 04 24 08.5620692040 +02 04 24.965341248   17.18 17.04     ~ 157 1
32 QSO B0422-389 Bla 04 24 33.7158620112 -38 48 41.634773136     18.0 18.7   ~ 31 1
33 [VV2006] J043850.5-201226 Bla 04 38 50.48962514 -20 12 26.3952942     22.80 22.8   ~ 36 1
34 QSO B0440-285 Bla 04 42 37.6571886984 -28 25 30.834692256     19.0 18.5   ~ 47 1
35 QSO B0446-212 Bla 04 48 17.3818320600 -21 09 44.831271816     19.5 19.1   ~ 59 1
36 QSO B0448-187 Bla 04 50 35.90961407 -18 37 00.4072358     19.0 19.4   ~ 32 1
37 QSO B0524-433 Bla 05 25 54.8941429728 -43 18 01.299471192     18.0 19.3   ~ 18 2
38 QSO B0618-252 QSO 06 20 32.1169584168 -25 15 17.486666892   18.32 18.5 18.47   ~ 54 1
39 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 234 1
40 QSO B0642-349 Bla 06 44 25.2811318320 -34 59 41.949194784     18.5 17.52   ~ 63 1
41 7C 064253.00+445430.00 Bla 06 46 32.02599653 +44 51 16.5901185   19.57 18.49 18.64   ~ 370 1
42 QSO J0753+4231 QSO 07 53 03.3374580696 +42 31 30.765827964   19.16 18.43     ~ 91 1
43 6C 080047+615309 Bla 08 05 18.17956222 +61 44 23.7005580       19.64   ~ 154 1
44 QSO B0805-077 Bla 08 08 15.53603763 -07 51 09.8865298     19.80 16.71   ~ 291 1
45 HS 0810+2554 QSO 08 13 31.2700262826 +25 45 03.076030845   16.58 16.18     ~ 126 0
46 QSO B0819-032 Bla 08 21 40.0372441512 -03 23 12.539229576     18.2 18.1   ~ 56 1
47 7C 082754.29+242103.00 Bla 08 30 52.08619250 +24 10 59.8202919   17.62 17.26 16.30   ~ 563 1
48 QSO B0839+187 Bla 08 42 05.0940565824 +18 35 40.988568300   16.63 16.36 16.56   ~ 196 2
49 4C 01.24B Bla 09 09 10.09159883 +01 21 35.6176206   17.63 17.29 17.04   ~ 454 2
50 QSO B0919-260 Bla 09 21 29.35386197 -26 18 43.3863288   18.46 18.41 18.01   ~ 144 1
51 QSO B0945-321 Bla 09 48 09.5121169368 -32 23 47.443531020     18.3 16.7   ~ 36 1
52 QSO B0952+179 QSO 09 54 56.82361677 +17 43 31.2221518   17.31 17.23     ~ 222 1
53 QSO B1005-333 BLL 10 07 31.38745248 -33 33 06.7169760   20.18 18.0 19.80   ~ 60 1
54 4C 19.34 Bla 10 24 44.80959654 +19 12 20.4155021   17.95 17.49 16.41   ~ 167 1
55 QSO B1032-199 Bla 10 35 02.15531760 -20 11 34.3596240   18.10 19.0 18.53   ~ 117 1
56 4C 06.41 BLL 10 41 17.16249940 +06 10 16.9237327   16.86 16.70 16.14   ~ 302 1
57 4C 12.37 QSO 10 42 44.6052783816 +12 03 31.263917976   18.03 17.77     ~ 448 2
58 QSO B1055-301 Bla 10 58 00.42743188 -30 24 55.0274126   19.4 19.5 19.33   ~ 48 1
59 QSO B1111+149 Bla 11 13 58.69508613 +14 42 26.9526507   17.89 17.57 17.41   ~ 121 1
60 QSO B1117-270 Bla 11 20 16.1919345072 -27 19 06.369842604   19.33 19.0 18.66   ~ 37 1
61 QSO B1119+184 Bla 11 22 29.7115177080 +18 05 26.341196568     18.0 16.80   ~ 85 1
62 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 739 1
63 QSO B1143-245 Bla 11 46 08.1033450360 -24 47 32.900532360   17.97 18.0 17.20   ~ 129 1
64 QSO B1147-192 Bla 11 50 31.52711708 -19 30 49.5487601     19.40 19.5   ~ 31 1
65 4C -00.47 Bla 11 50 43.8706351104 -00 23 54.203006868   17.51 17.38 17.1   ~ 375 1
66 QSO B1149-084 Bla 11 52 17.20951637 -08 41 03.3139769     18.50 18   ~ 123 1
67 4C 13.46 Bla 12 13 32.1707286888 +13 07 20.905849740   18.87 18.53 18   ~ 148 1
68 4C -02.55 Bla 12 32 00.0159535440 -02 24 04.793069304   17.41 17.06 16.4   ~ 440 1
69 QSO B1230-1008 Bla 12 33 13.16488603 -10 25 18.4373962   19.7 19.80 19.1   ~ 54 1
70 QSO B1252+119 Bla 12 54 38.25561478 +11 41 05.8950431   16.99 16.64 16.76   ~ 284 1
71 QSO B1255-316 Bla 12 57 59.06083282 -31 55 16.8516590   19.06   17.86   ~ 108 1
72 QSO B1256-1743 Bla 12 58 38.30170609 -18 00 03.1244242   20.50 20.20 20.6   ~ 81 1
73 QSO B1256-243 Bla 12 59 12.6258211992 -24 36 05.508060660     19.5 19.2   ~ 43 1
74 QSO B1318-263 Bla 13 21 14.03692236 -26 36 10.4646221   21.10   21.4   ~ 43 1
75 QSO B1319-093 Bla 13 22 36.91263175 -09 37 37.8002731     18.00 19.32   ~ 72 2
76 QSO B1324-047 Bla 13 26 54.61394860 -05 00 58.9732821     19.00 19.67   ~ 39 1
77 QSO B1331+170 Bla 13 33 35.7827544072 +16 49 04.013500728   16.84 16.71 16.41   ~ 469 1
78 4C 19.44 Bla 13 57 04.4366598768 +19 19 07.371837768   16.33 16.03 15.3   ~ 472 2
79 QSO B1406-267 Bla 14 09 50.16978505 -26 57 36.9804663   21.94   20.51   ~ 60 1
80 QSO B1412-096 Bla 14 15 20.83393426 -09 55 58.3305593     17.50 18.6   ~ 60 1
81 QSO J1423+1159 QSO 14 23 30.0998580768 +11 59 51.255359232   18.18 18.04     ~ 97 1
82 [VV2006] J142523.1-251306 Bla 14 25 23.03737033 -25 13 06.9709277     19.60 19.2   ~ 29 1
83 QSO B1430-178 Bla 14 32 57.69062795 -18 01 35.2488081   17.8 19.5 18.4   ~ 95 1
84 QSO B1448-232 QSO 14 51 02.5093156224 -23 29 31.107548184   17.13 16.96     ~ 135 2
85 QSO B1451-400 QSO 14 54 32.91237565 -40 12 32.5143755   19.01 18.5 17.10   ~ 65 1
86 QSO J1554-2704 Bla 15 54 02.46978052 -27 04 40.2335740   19.56 21.5 18.9   ~ 59 1
87 QSO B1615+028 Bla 16 17 49.9080413952 +02 46 43.107517308   17.59 17.67 17.310   ~ 85 1
88 [VV2006] J165945.1+021306 Bla 16 59 44.9979117840 +02 13 07.051118016     18.20 18.4   ~ 30 1
89 7C 1755+5749 Bla 17 56 03.6270838728 +57 48 47.989106532     18.00 18.4   ~ 61 1
90 QSO B1850+402 Bla 18 52 30.37254045 +40 19 06.6083252   18.5 18.5 19.02   ~ 66 1
91 QSO B2000-330 Bla 20 03 24.1161711720 -32 51 45.136882080   18.83 18.4 17.11   ~ 279 1
92 QSO J2047-1639 Bla 20 47 19.6670792592 -16 39 05.842775556   17.55 17.36     ~ 107 1
93 [VV2006] J212632.7-011932 Bla 21 26 32.75745352 -01 19 32.4051597     19.90 19.8   ~ 44 1
94 QSO B2126-15 Bla 21 29 12.17589329 -15 38 41.0419083   17.61 17.3 17.3   ~ 521 1
95 QSO B2134+0028 Bla 21 36 38.58632232 +00 41 54.2128562   17.30 17.08 17.02   ~ 580 2
96 QSO J2146-1525 Bla 21 46 22.97932711 -15 25 43.8856539   17.70 17.27 17.20   ~ 148 1
97 4C 06.69 Bla 21 48 05.45866779 +06 57 38.6041877   16.85 16.47 15.06   ~ 703 1
98 QSO B2145-176 Bla 21 48 36.80083970 -17 23 44.0146064   20.2   18.95   ~ 56 1
99 QSO B2149-306 Bla 21 51 55.52396937 -30 27 53.6980880   17.95 18.0 17.48   ~ 281 1
100 QSO B2200-238 Bla 22 02 55.9996205352 -23 35 10.246282188   17.91 18.5 17.75   ~ 50 1
101 QSO B2204-54 Bla 22 07 43.73329058 -53 46 33.8199643   18.45 18.0 18.20   ~ 178 1
102 QSO B2210-257 Bla 22 13 02.49798123 -25 29 30.0806026   18.41 19.0 18.8   ~ 135 1
103 4C -03.79 Bla 22 18 52.03772044 -03 35 36.8795441   16.93 16.38 16.15   ~ 353 1
104 [VV2006] J221947.3-005133 Bla 22 19 47.28245994 -00 51 32.5561191   20.28 20.07 19.4   ~ 34 1
105 4C 00.81 Bla 22 26 46.53701435 +00 52 11.3314982   21.64 20.97 19.62   ~ 93 1
106 QSO B2245-128 Bla 22 47 52.64103656 -12 37 19.7216861   18.5 18.5 17.74   ~ 57 1
107 QSO B2245-328 Bla 22 48 38.68573790 -32 35 52.1881477   18.38 18.6 18.63   ~ 132 1
108 QSO J2257+0243 Bla 22 57 17.56309534 +02 43 17.5116538   18.04 17.96 18.45   ~ 165 1
109 QSO B2255-2814 Bla 22 58 05.96287687 -27 58 21.2567572   17.34 16.77 17.20   ~ 397 1
110 QSO B2310+385 Bla 23 12 58.7940202248 +38 47 42.657287928     17.5     ~ 46 1
111 QSO B2311-373 Bla 23 13 59.7082094616 -37 04 46.215225516   19.0 18.5 19.05   ~ 47 1
112 QSO B2315-172 Bla 23 18 11.36139535 -16 59 29.1882572     19.5 19.7   ~ 31 1
113 QSO B2325-150 Bla 23 27 47.96426891 -14 47 55.7511114   19 19.0 18.8   ~ 65 1
114 QSO B2326-477 Bla 23 29 17.7043623168 -47 30 19.113949332   16.93 16.79 16.30   ~ 208 1
115 QSO J2337-1752 QSO 23 37 56.6276067864 -17 52 20.409464640   17.41 17.34     ~ 62 1
116 QSO B2340-0339 Bla 23 42 56.6002743864 -03 22 26.269675248   16.53 16.02 16.28   ~ 91 1
117 QSO B2353-686 Bla 23 56 00.68142337 -68 20 03.4720105   17.61 17.00 16.97   ~ 88 1
118 QSO B2354-117 Bla 23 57 31.19756127 -11 25 39.1768518   17.8 18.5 17.32   ~ 110 1

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