2011AJ....142..108K


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST08:52:48

2011AJ....142..108K - Astron. J., 142, 108 (2011/October-0)

Dual-frequency observations of 140 compact, flat-spectrum active galactic nuclei for scintillation-induced variability.

KOAY J.Y., MacQUART J.-P., RICKETT B.J., BIGNALL H.E., LOVELL J.E.J., REYNOLDS C., JAUNCEY D.L., PURSIMO T., KEDZIORA-CHUDCZER L. and OJHA R.

Abstract (from CDS):

The 4.9 GHz Micro-Arcsecond Scintillation-Induced Variability (MASIV) Survey detected a drop in interstellar scintillation (ISS) for sources at redshifts z ≳ 2, indicating an apparent increase in angular diameter or a decrease in flux density of the most compact components of these sources relative to their extended emission. This can result from intrinsic source size effects or scatter broadening in the intergalactic medium (IGM) in excess of the expected (1 + z)1/2 angular diameter scaling of brightness temperature limited sources resulting from cosmological expansion. We report here 4.9 GHz and 8.4 GHz observations and data analysis for a sample of 140 compact, flat-spectrum sources which may allow us to determine the origin of this angular diameter-redshift relation by exploiting their different wavelength dependences. In addition to using ISS as a cosmological probe, the observations provide additional insight into source morphologies and the characteristics of ISS. As in the MASIV Survey, the variability of the sources is found to be significantly correlated with line-of-sight Hα intensities, confirming its link with ISS. For 25 sources, time delays of about 0.15-3 days are observed between the scintillation patterns at both frequencies, interpreted as being caused by a shift in core positions when probed at different optical depths. Significant correlation is found between ISS amplitudes and source spectral index; in particular, a large drop in ISS amplitudes is observed at α < -0.4 confirming that steep spectrum sources scintillate less. We detect a weakened redshift dependence of ISS at 8.4 GHz over that at 4.9 GHz, with the mean variance at four-day timescales reduced by a factor of 1.8 in the z > 2 sources relative to the z < 2 sources, as opposed to the factor of three decrease observed at 4.9 GHz. This suggests scatter broadening in the IGM, but the interpretation is complicated by subtle selection effects that will be explored further in a follow-up paper.

Abstract Copyright:

Journal keyword(s): galaxies: active - intergalactic medium - ISM: structure - methods: data analysis - quasars: general - radio continuum: ISM

VizieR on-line data: <Available at CDS (J/AJ/142/108): table2.dat>

Simbad objects: 130

goto Full paper

goto View the reference in ADS

Number of rows : 130

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 MASIV J0009+1513 AGN 00 09 43.47 +15 13 37.9           ~ 3 0
2 6C 001403+811827 QSO 00 17 08.4748554 +81 35 08.136591   17.60 16.52 15.95   ~ 353 1
3 ICRF J001751.7+531219 QSO 00 17 51.7591727327 +53 12 19.121224807           ~ 16 1
4 QSO J0056+1625 BLL 00 56 55.29432846 +16 25 13.3409281       19.51   ~ 28 1
5 4C 01.02 QSO 01 08 38.7712667820 +01 35 00.318317679   18.54 18.39 19.05   ~ 457 1
6 [VV2006] J012201.9+031003 QSO 01 22 01.908 +03 10 02.41     20.07 20   ~ 11 0
7 QSO B0119+247 QSO 01 22 38.81597 +25 02 31.7930     18.5 17.91   ~ 54 1
8 4C 25.05 QSO 01 26 42.7928176501 +25 59 01.308385436     17.50 17.86   ~ 142 1
9 MASIV J0135+2158 QSO 01 35 53.4945 +21 58 16.152           ~ 4 0
10 [VV96] J015456.3+474327 QSO 01 54 56.28988783 +47 43 26.5395732       18.97   ~ 36 1
11 6C 021252+733537 BLL 02 17 30.8143057005 +73 49 32.612359669     19.0 18.97   ~ 400 1
12 MASIV J0237+2046 QSO 02 37 50.6293 +20 46 18.449           ~ 5 0
13 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1366 2
14 QSO B0239+108 QSO 02 42 29.17085456 +11 01 00.7279554   20.0   19.66   ~ 97 1
15 QSO J0259+1925 QSO 02 59 29.6547546922 +19 25 44.328531866       19   ~ 23 1
16 MASIV J0308+1208 AGN 03 08 39.38 +12 08 49.7           ~ 3 0
17 ICRF J031313.4+022835 QSO 03 13 13.40545828 +02 28 35.3064424           ~ 15 0
18 QSO B0319+12 QSO 03 21 53.10350836 +12 21 13.9537265   19 19     ~ 117 1
19 ICRF J032314.7+044612 QSO 03 23 14.7228529114 +04 46 12.569143738           ~ 15 1
20 2FGL J0342.4+3859 Bla 03 42 16.26 +38 59 06.2       19.5   ~ 22 0
21 QSO J0343+3633 QSO 03 43 28.95239734 +36 22 12.4295041     20.80 19.78   ~ 55 1
22 MASIV J0358+3850 AGN 03 58 44.43 +38 50 21.6           ~ 3 0
23 QSO B0400+258 QSO 04 03 05.58606763 +26 00 01.5028075     18 19.00   ~ 176 1
24 [VV98] J040626.0+251130 QSO 04 06 25.9983656256 +25 11 31.189762191     19.90     ~ 8 0
25 QSO B0406+121 BLL 04 09 22.00871268 +12 17 39.8477204   20.5   18.27   ~ 93 1
26 QSO B0420+022 QSO 04 22 52.21465772 +02 19 26.9310614     19.5 19.41   ~ 73 1
27 QSO B0446+113 BLL 04 49 07.67110088 +11 21 28.5964577     20 18.58   ~ 218 1
28 QSO J0459+0229 QSO 04 59 52.05066226 +02 29 31.1765607   18.2 19     ~ 149 1
29 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 276 1
30 QSO J0530+13 QSO 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 871 1
31 MASIV J0534+1047 AGN 05 34 40.73 +10 47 16.5           ~ 3 0
32 ICRF J053942.3+143345 QSO 05 39 42.36599103 +14 33 45.5616993           ~ 53 1
33 8C 0609+607 QSO 06 14 23.86617054 +60 46 21.7559014   20 19.1 18.8   ~ 61 1
34 7C 062051.50+385829.00 QSO 06 24 19.02128916 +38 56 48.7359920   20.0 20.0 19.24   ~ 62 1
35 7C 064253.00+445430.00 QSO 06 46 32.02599463 +44 51 16.5901237   19.57 18.49 18.64   ~ 314 1
36 ICRF J065917.9+081330 QSO 06 59 17.99603428 +08 13 30.9533022           ~ 23 1
37 87GB 072222.1+613123 AGN 07 26 51.6813950278 +61 25 13.684736267           ~ 5 1
38 7C 073246.29+753437.00 QSO 07 39 13.1965217238 +75 27 47.707311388           ~ 11 1
39 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 613 1
40 2MASS J07412972+2557318 QSO 07 41 29.7421450476 +25 57 32.257139782       19.1   ~ 13 0
41 QSO B0742+103 QSO 07 45 33.05952141 +10 11 12.6923363       23.72   ~ 169 1
42 QSO B0748+126 QSO 07 50 52.04573519 +12 31 04.8281766   17.67 17.28 17.16   ~ 265 1
43 QSO B0754+10 BLL 07 57 06.64294682 +09 56 34.8523471   15.43 15.00 15.99   ~ 395 1
44 SDSS J080034.37+485424.0 QSO 08 00 34.37224 +48 54 24.0055           ~ 8 0
45 6C 080047+615309 QSO 08 05 18.17956846 +61 44 23.7002968       19.64   ~ 88 1
46 ICRF J081026.4+101040 QSO 08 10 26.4239845390 +10 10 40.994981991   18.10 17.87     ~ 20 0
47 QSO B0808+019 BLL 08 11 26.70731189 +01 46 52.2202616   17.58 17.2 17.96   ~ 193 1
48 7C 081451.89+423206.00 BLL 08 18 15.99960470 +42 22 45.4149140   18.88 18.18 17.81   ~ 342 1
49 QSO J0821+3107 QSO 08 21 07.6134292339 +31 07 51.149469850   17.59 17.28     ~ 51 1
50 QSO B0823+033 BLL 08 25 50.33835429 +03 09 24.5200730   17.81 17.23 16.91   ~ 286 1
51 QSO J0850+5159 QSO 08 50 42.2442415678 +51 59 11.651027176   19.92 19.41     ~ 37 1
52 ICRF J085448.5+803422 QSO 08 54 48.5991937839 +80 34 22.386397550           ~ 12 1
53 ICRF J085654.8+714623 QSO 08 56 54.8684217985 +71 46 23.890920367           ~ 28 1
54 ICRF J091437.9+024559 Sy1 09 14 37.91343166 +02 45 59.2469393   19.94 19.74 19.2   ~ 85 1
55 [VV2006] J091641.8+024253 QSO 09 16 41.7693 +02 42 52.911   19.43 19.15     ~ 22 0
56 6C 091740+445437 QSO 09 20 58.45848243 +44 41 53.9850927   18.40 18.16 16.55   ~ 310 1
57 6C 092554+502611 BLL 09 29 15.4400532384 +50 13 35.987058917   17.18 16.80 15.94   ~ 111 2
58 ICRF J095359.2+172056 QSO 09 53 59.2313557752 +17 20 56.650410732   18.77 18.62 18.5   ~ 31 0
59 7C 095509.40+473935.00 QSO 09 58 19.67163931 +47 25 07.8424347   18.78 18.62 18.39   ~ 193 1
60 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 605 1
61 QSO J1007+1356 QSO 10 07 41.49808563 +13 56 29.6008672     19.0 18.59   ~ 101 1
62 7C 1013+2053 QSO 10 16 44.32210619 +20 37 47.3054173   19.67 19.41 18.67   ~ 58 1
63 ICRF J104946.3+142938 BLL 10 49 46.32758343 +14 29 38.5738701           ~ 12 1
64 7C 105328.60+702751.00 QSO 10 56 53.61750690 +70 11 45.9156324   18.5 18.5 19.32   ~ 85 1
65 CTD 74 QSO 11 25 53.71192285 +26 10 19.9786840   18.62 18.51 18.39   ~ 114 1
66 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 781 1
67 ICRF J124707.5+704645 QSO 12 47 07.5524527837 +70 46 45.115443573           ~ 10 1
68 [VV98] J130042.4-325312 QSO 13 00 42.4254849462 -32 53 12.118806423     18.70 18   ~ 70 0
69 87GB 131449.5+694301 AGN 13 16 23.0 +69 27 17           ~ 5 1
70 7C 132656.50+623705.00 QSO 13 28 40.5645180553 +62 21 37.039868859   19.53 19.13     ~ 25 2
71 IVS B1328+501 QSO 13 30 29.38888 +49 54 27.4835   19.38 19.14     ~ 19 0
72 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3615 1
73 7C 135303.70+670008.00 QSO 13 54 23.0756607923 +66 45 25.642780153           ~ 8 1
74 [VV2006] J141031.0+614137 QSO 14 10 30.9923482483 +61 41 36.917613484   19.17 18.98     ~ 28 1
75 PB 1950 QSO 14 17 40.4456542879 +38 18 21.138577802   18.73 18.64 18.1   ~ 39 1
76 8C 1435+638 QSO 14 36 45.8021364767 +63 36 37.865982148   17.06 16.86 16.23   ~ 180 1
77 6C 143538+512545 QSO 14 37 19.8041770969 +51 12 49.371877405           ~ 9 1
78 MITG J144210+0625 QSO 14 42 12.2387011646 +06 25 26.153376892           ~ 8 1
79 [VV98] J153514.8+483700 QSO 15 35 14.6531218958 +48 36 59.691976682   18.36 18.16     ~ 39 1
80 QSO B1547+507 QSO 15 49 17.46855479 +50 38 05.7882265   18.89 18.74 18.16   ~ 102 1
81 87GB 155723.0+081343 QSO 15 59 49.7211566098 +08 05 17.571206177           ~ 12 1
82 CLASS J161050.6171+780900.581 QSO 16 10 50.6022102593 +78 09 00.518402849           ~ 11 1
83 QSO B1614+051 QSO 16 16 37.55681502 +04 59 32.7367495   19.60 19.17 19.49   ~ 170 2
84 QSO J1619+2247 QSO 16 19 14.82461057 +22 47 47.8510784       20.00   ~ 41 1
85 4C 41.32 QSO 16 25 57.66971410 +41 34 40.6292986     22 21.73   ~ 152 1
86 [VV2006] J163915.8+412833 QSO 16 39 15.8075702713 +41 28 33.688257722   19.36 19.16 19.04 18.90 ~ 31 1
87 [VV2006] J165913.9+171415 QSO 16 59 13.8590726014 +17 14 15.063307554   19.58 19.30     ~ 21 1
88 ICRF J170121.3+033851 QSO 17 01 21.37817 +03 38 51.1750           ~ 8 1
89 7C 1716+6839 QSO 17 16 13.9368525850 +68 36 38.742970991   18.99 18.16 17.67   ~ 90 1
90 QSO B1717+178 BLL 17 19 13.0484094263 +17 45 06.437888139   20.10 19.1 17.28   ~ 182 1
91 ICRF J171952.2+081703 QSO 17 19 52.2062515339 +08 17 03.556534989       15.87   ~ 28 1
92 ICRF J172824.9+042704 Sy1 17 28 24.95272422 +04 27 04.9139217   17.43 16.99 16.24   ~ 191 1
93 MITG J1733+1635 QSO 17 33 01.5447011883 +16 35 52.648809822   19.5 20.0     ~ 5 0
94 7C 173240.70+385949.00 BLL 17 34 20.57853662 +38 57 51.4430746   19.5 19 19.00   ~ 160 1
95 4C 51.37 QSO 17 40 36.9779934388 +52 11 43.411910710   18.16 18.5 16.73   ~ 355 1
96 2MASX J17423197+5945065 BLL 17 42 32.0005041783 +59 45 06.732843996   17.74 17.14 16.7   ~ 62 1
97 2MASS J17452844+4059518 QSO 17 45 28.45287 +40 59 51.8094           ~ 8 1
98 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 784 1
99 ICRF J175758.8+053148 BLL 17 57 58.82500070 +05 31 48.0234394           ~ 9 1
100 7C 175844.60+384828.00 QSO 18 00 24.76536125 +38 48 30.6975330   17.8 17.8 17.04   ~ 123 1
101 7C 1812+5602 QSO 18 12 57.66948319 +56 03 49.2002134           ~ 19 1
102 ICRF J181926.5+384501 SyG 18 19 26.54737811 +38 45 01.7863328           ~ 105 0
103 ICRF J183243.4+135744 QSO 18 32 43.47110 +13 57 44.4002       18.18   ~ 27 1
104 ICRF J183905.8+410059 QSO 18 39 05.8039688811 +41 00 59.099866826           ~ 13 1
105 QSO B1848+283 QSO 18 50 27.5896910962 +28 25 13.154274911   17.1 17 17.16   ~ 69 1
106 ICRF J190536.4+194308 QSO 19 05 36.47207857 +19 43 08.0454964           ~ 10 1
107 87GB 191718.9+315406 QSO 19 19 13.2344435752 +31 59 45.061015389           ~ 8 1
108 87GB 192949.6+473705 QSO 19 31 16.5460970396 +47 43 41.212469308           ~ 10 1
109 QSO J2002+4725 QSO 20 02 10.41825568 +47 25 28.7737223           ~ 29 1
110 [VV98] J200617.7+642445 QSO 20 06 17.69456118 +64 24 45.4180969     19.00 20.13   ~ 48 1
111 MASIV J2011+7205 QSO 20 11 03.8214 +72 05 12.177           ~ 4 0
112 87GB 201138.8+630959 QSO 20 12 22.0238396999 +63 19 11.988242559           ~ 7 1
113 QSO J2016+1632 Bz? 20 16 13.86003 +16 32 34.1134       17.29   ~ 24 1
114 NAME AT 2019evq QSO 21 13 54.7206 +11 21 25.411   19.5 20.0     ~ 8 0
115 ICRF J211636.6+053617 QSO 21 16 36.6364745070 +05 36 17.126722429           ~ 12 0
116 QSO J2123+0535 QSO 21 23 44.51738 +05 35 22.0933   18.3 17.5 19.86   ~ 257 1
117 87GB 213459.5+043733 QSO 21 37 30.0189023409 +04 51 22.175866487           ~ 9 1
118 QSO B2201+1711 BLL 22 03 26.89368 +17 25 48.2479       14.76   ~ 166 1
119 2MASS J22082419+1808268 QSO 22 08 24.1908 +18 08 26.627           ~ 6 0
120 QSO B2209+236 QSO 22 12 05.96631138 +23 55 40.5438272   19   19.69   ~ 184 1
121 MASIV J2221+1117 QSO 22 21 19.1588 +11 17 41.945           ~ 4 0
122 ICRF J223704.2+421648 QSO 22 37 04.20978321 +42 16 48.2620193           ~ 9 1
123 QSO B2239+096 QSO 22 41 49.7169794148 +09 53 52.430142734   19.72 19.22 18.00   ~ 47 1
124 IVS B2239+296 QSO 22 42 15.1492769377 +29 55 43.089462759           ~ 5 0
125 ICRF J225312.4+323604 QSO 22 53 12.4987331455 +32 36 04.339753855           ~ 15 1
126 87GB 225552.3+050024 QSO 22 58 24.6042119207 +05 16 39.167056433           ~ 13 1
127 MASIV J2304+2710 QSO 23 04 29.4054 +27 10 31.110           ~ 4 0
128 QSO J2311+4543 QSO 23 11 47.40896553 +45 43 56.0164564       19.19   ~ 46 1
129 8C 2316+862 QSO 23 15 49.8227222262 +86 31 43.595884223           ~ 12 1
130 ICRF J233929.7+024405 QSO 23 39 29.7114615136 +02 44 05.357685139           ~ 12 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2011AJ....142..108K and select 'bookmark this link' or equivalent in the popup menu


2019.10.21-08:52:48

© Université de Strasbourg/CNRS

    • Contact