2016ApJ...821...33R

Query : 2016ApJ...821...33R

2016ApJ...821...33R - Astrophys. J., 821, 33-33 (2016/April-2)

Broad Hβ emission-line variability in a sample of 102 local active galaxies.

RUNCO J.N., COSENS M., BENNERT V.N., SCOTT B., KOMOSSA S., MALKAN M.A., LAZAROVA M.S., AUGER M.W., TREU T. and PARK D.

Abstract (from CDS):

A sample of 102 local (0.02 <= z <= 0.1) Seyfert galaxies with black hole masses MBH > 107M☉ was selected from the Sloan Digital Sky Survey (SDSS) and observed using the Keck 10 m telescope to study the scaling relations between MBH and host galaxy properties. We study profile changes of the broad Hβ emission line within the three to nine year time frame between the two sets of spectra. The variability of the broad Hβ emission line is of particular interest, not only because it is used to estimate MBH, but also because its strength and width are used to classify Seyfert galaxies into different types. At least some form of broad-line variability (in either width or flux) is observed in the majority (∼66%) of the objects, resulting in a Seyfert-type change for ∼38% of the objects, likely driven by variable accretion and/or obscuration. The broad Hβ line virtually disappears in 3/102 (∼3%) extreme cases. We discuss potential causes for these changing look active galactic nuclei. While similar dramatic transitions have previously been reported in the literature, either on a case-by-case basis or in larger samples focusing on quasars at higher redshifts, our study provides statistical information on the frequency of Hβ line variability in a sample of low-redshift Seyfert galaxies.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - galaxies: active - galaxies: evolution - galaxies: Seyfert - galaxies: statistics

VizieR on-line data: <Available at CDS (J/ApJ/821/33): table2.dat table3.dat>

Simbad objects: 110

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Number of rows : 110
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 2MASX J00133540-0951213 Sy1 00 13 35.3787037464 -09 51 20.870148096   17.56 17.21     ~ 22 0
2 2MASX J00262130+0009154 Sy1 00 26 21.2980306128 +00 09 14.978621916   18.30 17.56     ~ 21 0
3 2MASX J00384796+0034572 Sy1 00 38 47.9729625816 +00 34 57.579567780   19.00 18.29     ~ 29 0
4 RX J0109.6+0059 Sy1 01 09 39.0122974536 +00 59 50.362614708   18.43 17.97     ~ 35 0
5 Z 385-82 Sy1 01 21 59.8143568104 -01 02 24.367631424   17.04 16.78 11.0   ~ 160 0
6 2MASX J01501642+0057015 Sy1 01 50 16.4339642496 +00 57 01.918563552   18.20 17.51     ~ 33 0
7 2MASS J01595763+0033105 Sy1 01 59 57.6419121888 +00 33 10.497849444   20.31 19.66     ~ 109 0
8 Z 387-34 Sy1 02 06 15.9896281128 -00 17 29.221733688   15.90 15.50 10.3   ~ 405 0
9 LEDA 1449281 Sy1 02 12 57.5912277696 +14 06 10.246134888   17.76 17.18     ~ 34 0
10 NGC 863 Sy2 02 14 33.5604714720 -00 46 00.181845336   14.48 13.81 17.9   ~ 770 0
11 SDSS J030124.26+011022.9 Sy1 03 01 24.2643123384 +01 10 22.838717316   18.18 17.72     ~ 20 0
12 2MASS J03014420+0115308 Sy1 03 01 44.1986759664 +01 15 30.843372276   17.90 17.49     ~ 27 0
13 LEDA 138607 Sy1 03 10 27.8271759768 -00 49 50.801124072   16.59 16.33 15.3   ~ 67 0
14 LEDA 1024359 Sy2 03 36 02.0932155768 -07 06 17.141506560   18.98 18.17     ~ 18 0
15 LEDA 1033399 Sy1 03 53 01.0243052640 -06 23 26.372104800   18.15 17.57 16.52   ~ 26 0
16 2MASS J07312667+4522174 Sy1 07 31 26.6689854648 +45 22 17.355732060   18.72 18.14     ~ 17 0
17 SDSS J073521.19+375202.0 Sy2 07 35 21.1983694656 +37 52 02.038094328   19.61 18.83     ~ 13 0
18 2MASX J07370330+4244146 Sy1 07 37 03.2829575760 +42 44 14.651711628   18.45 17.98     ~ 19 0
19 2MASS J08024340+3104033 Sy1 08 02 43.4042090112 +31 04 03.373678956   17.34 16.95     ~ 32 0
20 2MASS J08111028+1739439 Sy1 08 11 10.2934891992 +17 39 43.807695912   18.89 18.19     ~ 18 0
21 LEDA 3422317 Sy1 08 13 19.3272031560 +46 08 49.743978000   18.20 17.54     ~ 46 0
22 2MASS J08310763+0521057 Sy2 08 31 07.6285120008 +05 21 05.893930872   18.84 18.11     ~ 15 0
23 NGC 2617 Sy2 08 35 38.7981089496 -04 05 17.901104280   13.6   12.63 13.2 ~ 226 0
24 2MASS J08455666+3409360 Sy1 08 45 56.6708361480 +34 09 36.139041648   18.30 17.72     ~ 21 0
25 LEDA 1734144 Sy1 08 46 54.0970708008 +25 22 12.309993660   16.79 16.35     ~ 43 0
26 2E 2050 Sy1 08 47 48.2784531048 +18 24 39.964651092   18.00 17.57     ~ 24 0
27 Mrk 1220 Sy1 08 54 39.2438221745 +17 41 22.430341744   16.45 16.13     ~ 60 0
28 LEDA 1283968 Sy1 08 57 37.7794583904 +05 28 21.376174908   17.64 17.17     ~ 29 0
29 2MASX J09043699+5536025 Sy1 09 04 36.9448557528 +55 36 02.716667100   17.16 16.73 13.5   ~ 78 1
30 2MASX J09090233+1330196 Sy1 09 09 02.3576706432 +13 30 19.458470664   18.50 17.97     ~ 21 0
31 ZW VIII 45 Sy1 09 21 15.5590600200 +10 17 41.092400004   17.74 17.16     ~ 39 0
32 LEDA 3741537 Sy2 09 23 19.7289397512 +29 46 09.081479784   18.42 17.75 15.768   ~ 23 0
33 Z 121-75 Sy1 09 23 43.0005086832 +22 54 32.576001696   16.23 15.82     ~ 165 0
34 NGC 2885 Sy1 09 27 18.5044906584 +23 01 12.211090320   16.99 16.25     ~ 81 1
35 2MASX J09324053+0233322 Sy1 09 32 40.5512271696 +02 33 32.666063976   18.49 17.80     ~ 19 0
36 LEDA 1263264 Sy2 09 32 59.6038446336 +04 05 06.019364508   18.14 17.55     ~ 21 0
37 PSST 15cek Sy1 09 36 41.0474587584 +10 14 16.031836680   18.21 17.62     ~ 33 0
38 Z 35-17 Sy1 09 38 12.2649651984 +07 43 39.952926048   17.16 16.49     ~ 39 0
39 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
40 1WGA J0948.6+4030 Sy1 09 48 38.4270615816 +40 30 43.868269404   17.55 17.03     ~ 40 0
41 LEDA 1788785 Sy2 10 02 18.7915141800 +26 48 05.785436556   18.16 17.47     ~ 17 0
42 2MASS J10215235+4645158 Sy1 10 21 52.3536589752 +46 45 15.701576328   18.35 18.03     ~ 36 0
43 2MASX J10290162+2728517 Sy1 10 29 01.6222285128 +27 28 51.306881304   18.04 17.44     ~ 16 0
44 LEDA 1450274 Sy1 10 29 25.7418167928 +14 08 23.224992684   17.56 17.03     ~ 22 0
45 2MASS J10294682+4019135 Sy1 10 29 46.8107303424 +40 19 13.638963432   17.63 17.22     ~ 23 0
46 2MASS J10383342+4658067 Sy1 10 38 33.42725 +46 58 06.7177   18.19 17.70     ~ 16 0
47 2MASX J10425297+0414413 Sy1 10 42 52.9406758320 +04 14 41.220143988   18.15 17.64     ~ 25 0
48 SDSS J104326.47+110524.2 Sy1 10 43 26.4782266656 +11 05 24.260745120   17.18 17.01     ~ 59 0
49 2MASX J10492536+2451237 Sy1 10 49 25.3861771416 +24 51 23.799875652   17.24 16.93     ~ 25 0
50 LEDA 3510550 Sy1 10 58 28.7727260880 +52 59 29.195051856   18.26 17.63     ~ 17 0
51 Z 66-94 Sy1 11 01 01.7740767504 +11 02 48.909646824   17.46 16.91     ~ 122 0
52 2MASX J11045601+4334089 Sy1 11 04 56.0264385480 +43 34 09.222957948   18.42 17.80     ~ 23 0
53 Z 67-27 Sy1 11 10 45.9627114984 +11 36 41.587564032   17.81 17.20     ~ 35 0
54 UGC 6285 Sy1 11 16 07.6565518536 +41 23 53.194095240   17.70 16.98     ~ 27 0
55 LEDA 1836564 Sy2 11 18 53.0297405472 +28 27 57.646955808   18.85 18.19     ~ 11 0
56 IC 2921 Sy1 11 32 49.2726704040 +10 17 47.278814280   17.61 16.94     ~ 69 0
57 2MASS J11370419+4826589 Sy1 11 37 04.1758480176 +48 26 59.015371596   18.49 17.86     ~ 16 0
58 LEDA 36114 Sy1 11 39 08.9709094608 +59 11 54.769213068   15.88 15.77     ~ 104 1
59 LEDA 1681961 Sy2 11 40 54.0821404248 +23 07 44.306350608   18.39 17.82     ~ 16 0
60 2MASX J11434424+5941126 Sy1 11 43 44.3030867832 +59 41 12.308285616   18.18 17.71     ~ 21 0
61 LEDA 36541 Sy1 11 44 29.8707689808 +36 53 08.616327396   16.26 15.49     ~ 95 0
62 2MASX J11454517+5547598 Sy1 11 45 45.1966769712 +55 47 59.630338176   18.58 17.99     ~ 28 0
63 LEDA 1358514 Sy1 11 47 55.0787992080 +09 02 28.821585804   16.77 16.50     ~ 53 0
64 LEDA 2359832 Sy2 12 05 56.0138867424 +49 59 56.249557332   17.62 17.17     ~ 52 0
65 2MASX J12062629+4244262 Sy1 12 06 26.2840265304 +42 44 26.101128984   17.77 17.31     ~ 22 0
66 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
67 Z 215-46 Sy1 12 10 44.2769901360 +38 20 10.198509684   16.49 15.92     ~ 93 0
68 MCG+09-20-136 Sy2 12 16 07.0972137408 +50 49 30.088685496   17.20 16.62     ~ 88 1
69 Mrk 50 Sy1 12 23 24.1362367968 +02 40 44.449405212   17.25 16.63     ~ 263 1
70 LEDA 3511634 Sy1 12 28 11.4164437152 +09 51 26.784983052   18.37 17.72     ~ 17 0
71 LEDA 3583232 Sy1 12 31 52.0542214920 +45 04 43.129838172   18.09 17.42     ~ 28 0
72 2MASX J12412939+3722017 Sy1 12 41 29.4183060288 +37 22 02.018101440   18.01 17.45     ~ 25 0
73 2MASS J12463872+5134560 Sy1 12 46 38.7158269560 +51 34 55.885615788   18.78 18.15     ~ 16 0
74 Z 15-26 Sy1 12 50 42.4427219280 -02 49 31.444980384   17.56 17.07 14.981   ~ 28 0
75 2MASX J13061980+4552244 Sy1 13 06 19.8427167408 +45 52 24.153600432   18.69 18.05     ~ 20 0
76 2MASX J13072192+0952091 Sy1 13 07 21.9303868224 +09 52 09.303100284   18.28 17.66     ~ 18 0
77 2MASX J13125962+2628238 Sy1 13 12 59.6000914608 +26 28 24.015928260   17.72 17.33     ~ 34 1
78 LEDA 2089013 Sy1 13 13 48.9667344288 +36 53 58.006140684   18.42 17.87     ~ 32 0
79 2MASX J13231043+2701403 Sy1 13 23 10.3853424168 +27 01 40.476298836   18.75 18.14     ~ 17 0
80 2E 3146 Sy1 13 53 45.9318170328 +39 51 01.570236840   18.29 17.65     ~ 30 0
81 Mrk 464 Sy2 13 55 53.5275787680 +38 34 28.680014712   17.57 17.13     ~ 119 0
82 LEDA 126151 Sy1 14 05 14.8687808520 -02 59 01.264466616   18.09 17.51     ~ 27 0
83 Z 18-99 Sy1 14 16 30.8178185400 +01 37 08.028187716   17.84 17.26     ~ 39 0
84 Z 47-5 Sy1 14 19 08.3123342784 +07 54 49.627547424   17.57 16.92     ~ 43 0
85 2MASX J14233843+2720101 Sy1 14 23 38.4368432760 +27 20 09.704270652   17.95 17.47     ~ 15 0
86 NGC 5683 Sy1 14 34 52.4587723488 +48 39 42.730942860   16.46 16.08     ~ 192 1
87 Z 76-133 Sy1 15 01 38.7964671744 +10 25 13.450366056   17.36 16.84     ~ 54 0
88 Z 48-115 Sy1 15 05 56.5521472536 +03 42 26.339214780   15.80 15.50     ~ 159 0
89 Mrk 290 Sy1 15 35 52.4031021552 +57 54 09.515660508   15.55 15.27     ~ 575 0
90 2MASX J15435145+3631361 Sy1 15 43 51.5009764728 +36 31 36.754843440   17.44 17.07     ~ 19 0
91 2MASX J15450754+1709510 Sy1 15 45 07.5220900224 +17 09 50.910619572   17.81 17.29     ~ 29 0
92 2MASX J15541741+3238381 Sy1 15 54 17.4344400480 +32 38 37.811847444   17.07 16.61     ~ 38 0
93 2MASS J15573313+0830430 Sy1 15 57 33.1364306976 +08 30 42.950201436   17.73 17.37     ~ 17 0
94 2MASX J16050246+3305448 Sy1 16 05 02.4616748832 +33 05 45.018776184   17.65 17.19     ~ 32 0
95 LEDA 3586108 Sy2 16 06 55.9454593368 +33 24 00.260955864   18.23 17.64     ~ 21 0
96 LEDA 2408850 Sy1 16 11 56.3148114816 +52 11 16.868679144   17.43 16.85     ~ 31 0
97 LEDA 2191401 Sy2 16 36 31.2865353000 +42 02 42.522500760   17.68 17.14 13.18 13.52 ~ 28 0
98 2MASX J16472144+4442094 Sy1 16 47 21.4673279880 +44 42 09.728105004   18.53 17.89     ~ 14 0
99 SDSS J165514.21+201442.0 Sy1 16 55 14.2069890384 +20 14 42.094057416   19.08 18.33     ~ 12 0
100 LEDA 1659236 Sy1 17 08 59.1255573864 +21 53 08.171364768   17.92 17.53     ~ 46 1
101 NGC 6423 Sy1 17 36 53.3323686648 +68 10 17.342020200   15.6       ~ 21 0
102 2MASS J21164634+1102375 Sy2 21 16 46.3389546792 +11 02 37.460221836   17.88 17.53     ~ 34 0
103 RX J2140.9+0025 Sy1 21 40 54.5549206056 +00 25 38.201361564   16.81 16.49     ~ 45 0
104 RX J2215.7-0036 Sy1 22 15 42.2975894904 -00 36 09.687505068   17.87 17.47 16.43   ~ 35 0
105 2MASX J22211086-0906220 Sy1 22 21 10.8331618152 -09 06 21.938825088   18.80 18.23     ~ 16 0
106 LEDA 192028 Sy1 22 22 46.6176921120 -08 19 43.893613020   18.00 17.47     ~ 21 0
107 LEDA 1425499 Sy1 22 33 38.4214395984 +13 12 43.635143124   17.83 17.38     ~ 28 0
108 2MASX J22545221+0046316 Sy1 22 54 52.2284666232 +00 46 31.360423080   17.96 17.40     ~ 34 0
109 [VV98] J232722.2+152436 Bla 23 27 21.9664282368 +15 24 37.311384420   16.93 16.28 10.09   ~ 105 1
110 2MASX J23512879+1552590 Sy1 23 51 28.7770765008 +15 52 59.165588280   18.06 17.51     ~ 23 0

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