2019ApJ...882..181B

Query : 2019ApJ...882..181B

2019ApJ...882..181B - Astrophys. J., 882, 181-181 (2019/September-2)

A Catalog of hyper-luminous X-ray sources and intermediate-mass black hole candidates out to high redshifts.

BARROWS R.S., MEZCUA M. and COMERFORD J.M.

Abstract (from CDS):

Hyper-luminous X-ray sources (HLXs; LX > 1041 erg s–1) are off-nuclear X-ray sources in galaxies and strong candidates for intermediate-mass black holes (IMBHs). We have constructed a sample of 169 HLX candidates by combining X-ray detections from the Chandra Source Catalog (Version 2) with galaxies from the Sloan Digital Sky Survey and registering individual images for improved relative astrometric accuracy. The spatial resolution of Chandra allows for the sample to extend out to z ∼ 0.9. Optical counterparts are detected among one-fourth of the sample, one-third of which are consistent with dwarf galaxy stellar masses. The average intrinsic X-ray spectral slope indicates efficient accretion, potentially driven by galaxy mergers, and the column densities suggest one-third of the sample has significant X-ray absorption. We find that 144 of the HLX candidates have X-ray emission that is significantly in excess of the expected contribution from star formation and hot gas, strongly suggesting that they are produced by accretion onto black holes more massive than stars. After correcting for an average background or foreground contamination rate of 8%, we estimate that at least ∼20 of the HLX candidates are consistent with IMBH masses, and this estimate is potentially several times higher assuming more efficient accretion. This catalog currently represents the largest sample of uniformly selected, off-nuclear IMBH candidates. These sources may represent scenarios in which a low-mass galaxy hosting an IMBH has merged with a more massive galaxy and provide an excellent sample for testing models of low-mass BH formation and merger-driven growth.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Active galactic nuclei - AGN host galaxies - Dwarf galaxies - Galaxy mergers - Intermediate-mass black holes - X-ray active galactic nuclei - X-ray quasars

VizieR on-line data: <Available at CDS (J/ApJ/882/181): table1.dat table2.dat table3.dat>

Simbad objects: 163

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Number of rows : 163
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 SDSS J000150.94+232957.1 G 00 01 50.94912 +23 29 57.1416           ~ 1 0
2 SDSS J001320.07-192746.4 G 00 13 20.07216 -19 27 46.4040           ~ 1 0
3 SDSS J001837.98+163319.9 G 00 18 37.98072 +16 33 19.9332           ~ 1 0
4 LEDA 1161460 G 00 22 34.4580563902 +00 16 03.198492542           ~ 3 0
5 SDSS J003608.60+182105.4 G 00 36 08.60304 +18 21 05.4072           ~ 1 0
6 SDSS J003933.79+031830.4 G 00 39 33.79080 +03 18 30.4200           ~ 1 0
7 SDSS J004114.58-210737.6 G 00 41 14.58072 -21 07 37.6248           ~ 1 0
8 SDSS J004201.96-092426.3 G 00 42 01.96608 -09 24 26.3052           ~ 1 0
9 SDSS J004709.94-080802.0 G 00 47 09.94680 -08 08 02.0112           ~ 1 0
10 SDSS J005550.41+262337.2 G 00 55 50.41416 +26 23 37.2840     22.12     ~ 3 0
11 SDSS J011258.35+153159.1 G 01 12 58.35336 +15 31 59.1168           ~ 1 0
12 CAIRNS J011854.56-010554.4 GiC 01 18 54.5592275544 -01 05 54.398641596           ~ 4 0
13 SDSS J012538.76-012124.1 G 01 25 38.76888 -01 21 24.1380           ~ 1 0
14 2MASX J01255837-0117204 GiC 01 25 58.3948653288 -01 17 20.030900316   16.40       ~ 11 0
15 SDSS J013122.83+062328.0 G 01 31 22.83504 +06 23 28.0248           ~ 1 0
16 SDSS J013635.29+205641.1 G 01 36 35.29752 +20 56 41.1864           ~ 1 0
17 SDSS J020432.76-050328.3 G 02 04 32.76192 -05 03 28.3104           ~ 1 0
18 SDSS J020450.85-050726.3 G 02 04 50.85768 -05 07 26.3640           ~ 1 0
19 PSO J040.2861-08.2334 G 02 41 08.67272160 -08 14 00.4561080           ~ 1 0
20 SDSS J025239.59-011543.8 G 02 52 39.59016 -01 15 43.8876           ~ 1 0
21 SDSS J032127.26+165225.6 G 03 21 27.26784 +16 52 25.6908           ~ 1 0
22 LEDA 1483429 G 03 41 15.4148079991 +15 23 34.480625709           ~ 3 0
23 SDSS J041435.06+053427.7 G 04 14 35.06712 +05 34 27.7392           ~ 1 0
24 SDSS J041447.65+053411.9 G 04 14 47.65512 +05 34 11.9100           ~ 1 0
25 SDSS J081913.01+204833.9 G 08 19 13.01496 +20 48 33.9264           ~ 1 0
26 SDSS J082253.26+210354.8 G 08 22 53.26968 +21 03 54.8028           ~ 1 0
27 SDSS J083013.65+655803.5 G 08 30 13.65480 +65 58 03.5184           ~ 1 0
28 SDSS J083133.33+655146.4 G 08 31 33.33216 +65 51 46.4364           ~ 1 0
29 SDSS J083147.58+524638.7 G 08 31 47.58696 +52 46 38.7264           ~ 1 0
30 SDSS J083428.18+553840.5 G 08 34 28.18800 +55 38 40.5060           ~ 1 0
31 SDSS J085255.85+511756.1 G 08 52 55.85064 +51 17 56.1948           ~ 1 0
32 SDSS J085306.22+511818.0 G 08 53 06.22272 +51 18 18.0612           ~ 1 0
33 SDSS J091548.99+441941.7 G 09 15 48.99744 +44 19 41.7648           ~ 1 0
34 SDSS J094830.77+315442.2 G 09 48 30.77496 +31 54 42.2388           ~ 1 0
35 SDSS J095236.18+515634.4 GiC 09 52 36.1900 +51 56 34.583           ~ 3 0
36 SDSS J095759.54+024649.8 AGN 09 57 59.54 +02 46 49.8 21.444 20.877 19.643   18.691 ~ 10 0
37 SDSS J095816.98+014101.0 AGN 09 58 16.983 +01 41 01.09   23.759 23.260   21.72 ~ 15 0
38 SDSS J095837.76+020434.2 G 09 58 37.767 +02 04 34.18 22.127 21.688 20.785 20.603 20.256 ~ 9 0
39 SDSS J100019.75+020328.7 AGN 10 00 19.750 +02 03 28.85 22.634 22.25 21.160 20.799 20.336 ~ 13 0
40 SDSS J100228.86+023732.5 AGN 10 02 28.80 +02 37 32.0   23.0742 22.4867   22.372 ~ 20 0
41 SDSS J100437.30+411444.9 G 10 04 37.30824 +41 14 44.9340           ~ 1 0
42 SDSS J103140.01+350658.0 G 10 31 40.01136 +35 06 58.0572           ~ 1 0
43 SDSS J103240.60+574035.7 G 10 32 40.60632 +57 40 35.7096           ~ 1 0
44 SDSS J103822.14+484945.0 G 10 38 22.14744 +48 49 45.0480           ~ 1 0
45 LEDA 2327673 G 10 38 44.3458692096 +48 52 13.545262056           ~ 8 0
46 SDSS J104059.56+395414.0 GiC 10 40 59.5740668856 +39 54 14.086183356           ~ 2 0
47 SDSS J104314.32+590954.8 G 10 43 14.32200 +59 09 54.8568           ~ 3 0
48 SDSS J104744.54+123925.1 G 10 47 44.54352 +12 39 25.1460           ~ 1 0
49 SDSS J110043.50+103403.7 G 11 00 43.50936 +10 34 03.7308           ~ 1 0
50 SDSS J111423.75+403450.8 G 11 14 23.75616 +40 34 50.8044           ~ 1 0
51 SDSS J111529.34+531838.9 GiC 11 15 29.3471 +53 18 39.208           ~ 2 0
52 SDSS J111932.93+212652.1 G 11 19 32.93328 +21 26 52.1196           ~ 1 0
53 SDSS J111945.74+212821.7 G 11 19 45.74496 +21 28 21.7704   23.04   21.14   ~ 2 0
54 SDSS J111954.35+064237.5 G 11 19 54.35664 +06 42 37.5552           ~ 1 0
55 PSO J170.2712+53.1162 G 11 21 05.11195440 +53 06 58.6046880           ~ 1 0
56 SDSS J112806.73+583544.6 G 11 28 06.73704 +58 35 44.6928       20.01   ~ 2 0
57 SDSS J113005.41+363523.8 G 11 30 05.41824 +36 35 23.8524           ~ 1 0
58 SDSS J113158.21+045445.7 G 11 31 58.21632 +04 54 45.7056           ~ 1 0
59 SDSS J114438.21+194406.7 G 11 44 38.21064 +19 44 06.7632           ~ 1 0
60 SDSS J115924.25+554740.9 G 11 59 24.25848 +55 47 40.9740           ~ 1 0
61 SDSS J120158.12+575222.8 G 12 01 58.12272 +57 52 22.8684           ~ 1 0
62 SDSS J120228.33+580247.7 G 12 02 28.33008 +58 02 47.7276           ~ 1 0
63 SDSS J120844.18+651028.2 G 12 08 44.18112 +65 10 28.2936           ~ 1 0
64 SDSS J121410.39+543415.1 G 12 14 10.39416 +54 34 15.1896           ~ 1 0
65 SDSS J122107.33+492052.6 G 12 21 07.33632 +49 20 52.6380           ~ 1 0
66 SDSS J122148.18+491133.1 G 12 21 48.18048 +49 11 33.1044           ~ 1 0
67 SDSS J122154.82+271023.9 G 12 21 54.82220 +27 10 23.9551           ~ 2 0
68 SDSS J122426.07+071418.8 G 12 24 26.07072 +07 14 18.8520           ~ 1 0
69 SDSS J122500.31+131545.0 G 12 25 00.31608 +13 15 45.0036           ~ 1 0
70 SDSS J122644.81+215500.5 G 12 26 44.81472 +21 55 00.5412           ~ 1 0
71 SDSS J122644.98+215653.0 G 12 26 44.98320 +21 56 53.0700           ~ 1 0
72 SDSS J122801.52+441057.8 EmG 12 28 01.52808 +44 10 57.8460           ~ 2 0
73 SDSS J122812.57+440846.4 G 12 28 12.57456 +44 08 46.4820           ~ 1 0
74 SDSS J122957.28+111931.9 G 12 29 57.28944 +11 19 31.9836           ~ 1 0
75 SDSS J124205.46+323038.4 G 12 42 05.46672 +32 30 38.4192           ~ 1 0
76 SDSS J124209.93+331828.7 G 12 42 09.93864 +33 18 28.7244           ~ 1 0
77 SDSS J124357.27+162257.8 G 12 43 57.27192 +16 22 57.8208           ~ 1 0
78 SDSS J125402.95+271114.4 G 12 54 02.95560 +27 11 14.4168           ~ 1 0
79 SDSS J125614.66+355406.7 G 12 56 14.66520 +35 54 06.7284           ~ 1 0
80 SDSS J130048.37+275247.5 G 13 00 48.37656 +27 52 47.5788           ~ 1 0
81 SDSS J130710.47+463529.0 G 13 07 10.47792 +46 35 29.0580           ~ 1 0
82 [TVS2020] MACS1311 46883 AGN 13 10 42.57336 -03 14 22.4664           ~ 3 0
83 SDSS J131106.73-030442.6 G 13 11 06.73752 -03 04 42.6468           ~ 1 0
84 LEDA 88776 rG 13 11 33.1569738576 -01 17 01.781440260   19.55 18.19 17.48 16.90 ~ 11 0
85 SDSS J131149.02-005858.8 G 13 11 49.02840 -00 58 58.8864           ~ 1 0
86 SDSS J131731.84+290848.0 G 13 17 31.84392 +29 08 48.0372           ~ 1 0
87 SDSS J132442.11+301232.2 GiC 13 24 42.11760 +30 12 32.2704           ~ 3 0
88 SDSS J132618.34+290136.2 G 13 26 18.34056 +29 01 36.2388           ~ 1 0
89 SDSS J132916.27+114404.3 G 13 29 16.27440 +11 44 04.3692           ~ 1 0
90 SDSS J133059.37-014634.1 G 13 30 59.37480 -01 46 34.1508           ~ 1 0
91 SDSS J133306.67+502246.6 G 13 33 06.67248 +50 22 46.6644           ~ 1 0
92 SDSS J133813.04+043217.9 G 13 38 13.04256 +04 32 17.9124           ~ 1 0
93 SDSS J133831.83+481923.4 G 13 38 31.83264 +48 19 23.4912           ~ 1 0
94 SDSS J134029.27+401605.2 G 13 40 29.27256 +40 16 05.2788           ~ 1 0
95 SDSS J134144.41+262026.3 G 13 41 44.41152 +26 20 26.3688           ~ 1 0
96 SDSS J134159.13+262122.8 G 13 41 59.13072 +26 21 22.8240           ~ 1 0
97 SDSS J134714.54+062316.1 G 13 47 14.54736 +06 23 16.1916           ~ 1 0
98 SDSS J135039.69+601134.2 G 13 50 39.69528 +60 11 34.2564           ~ 1 0
99 SDSS J135159.21+312706.0 G 13 51 59.06208 +31 27 06.7716           ~ 1 0
100 SDSS J135227.63+312932.9 G 13 52 27.63744 +31 29 32.9820           ~ 1 0
101 SDSS J140038.60-014153.7 G 14 00 38.60184 -01 41 53.7792           ~ 1 0
102 SDSS J140047.72+025001.2 G 14 00 47.72736 +02 50 01.2984           ~ 1 0
103 SDSS J140054.13+025223.4 AGN 14 00 54.139 +02 52 23.38           ~ 4 0
104 SDSS J140125.22+025040.6 G 14 01 25.22880 +02 50 40.6320           ~ 1 0
105 SDSS J140606.25+222859.4 G 14 06 06.25968 +22 28 59.4264           ~ 1 0
106 SDSS J141456.90+361321.5 G 14 14 56.90664 +36 13 21.5292           ~ 1 0
107 SDSS J141458.60-002020.2 G 14 14 58.60464 -00 20 20.2308           ~ 1 0
108 SDSS J141511.04-003530.0 G 14 15 11.04312 -00 35 30.0984           ~ 1 0
109 SDSS J141516.65+361437.2 G 14 15 16.65480 +36 14 37.2300           ~ 1 0
110 SDSS J141558.73+113202.0 G 14 15 58.73208 +11 32 02.0328           ~ 1 0
111 CFDF 14h 59894 rG 14 17 45.64101 +52 28 02.0679   23.01 22.410 21.99 21.64 ~ 14 0
112 SDSS J142333.74+240242.9 G 14 23 33.74952 +24 02 42.9036           ~ 1 0
113 SDSS J143114.20+361907.0 G 14 31 14.20008 +36 19 07.0392           ~ 1 0
114 SDSS J143829.69+032957.0 G 14 38 29.69376 +03 29 57.0516           ~ 1 0
115 SDSS J144715.60+404841.4 G 14 47 15.60144 +40 48 41.4936           ~ 1 0
116 SDSS J145025.86+581634.4 G 14 50 25.86696 +58 16 34.4748           ~ 1 0
117 SDSS J145209.25+430100.0 Sy1 14 52 09.25920 +43 01 00.0228       21.760   ~ 5 0
118 SDSS J150100.08+013929.6 G 15 01 00.08712 +01 39 29.6388           ~ 1 0
119 SDSS J150508.54+255958.3 G 15 05 08.54040 +25 59 58.3764           ~ 1 0
120 PSO J226.6493+01.5629 G 15 06 35.85982 +01 33 46.7668           ~ 1 0
121 SDSS J150938.58+332913.7 G 15 09 38.58312 +33 29 13.7580           ~ 1 0
122 SDSS J151024.77+333016.6 G 15 10 24.7745317351 +33 30 16.581577057           ~ 2 0
123 SDSS J151026.97+570334.6 G 15 10 26.97840 +57 03 34.6968           ~ 1 0
124 SDSS J151055.82+054648.6 G 15 10 55.828 +05 46 48.64           ~ 3 0
125 SDSS J151550.59+552927.1 G 15 15 50.59128 +55 29 27.1104           ~ 1 0
126 SDSS J152217.27+074423.9 G 15 22 17.27064 +07 44 23.9208           ~ 1 0
127 SDSS J152453.98+095920.7 G 15 24 53.98 +09 59 20.8           ~ 2 0
128 SDSS J153240.10+301821.1 G 15 32 40.10592 +30 18 21.1788           ~ 1 0
129 SDSS J155213.13+201328.3 GiC 15 52 13.1316615816 +20 13 28.341058980           ~ 2 0
130 SDSS J155220.26+200928.5 G 15 52 20.26368 +20 09 28.5912           ~ 1 0
131 SDSS J155910.24+204621.0 G 15 59 10.24872 +20 46 21.0252           ~ 1 0
132 SDSS J160423.83+431127.0 AGN 16 04 23.90 +43 11 25.8           ~ 6 0
133 SDSS J160610.56+000045.6 G 16 06 10.56480 +00 00 45.6732           ~ 1 0
134 SDSS J160626.92+000205.4 G 16 06 26.92440 +00 02 05.4744           ~ 1 0
135 SDSS J161252.95+564800.8 G 16 12 52.95552 +56 48 00.9000           ~ 1 0
136 SDSS J162836.34+393023.5 G 16 28 36.34704 +39 30 23.5800   24.96       ~ 2 0
137 SDSS J162901.45+393620.2 G 16 29 01.45512 +39 36 20.2428           ~ 1 0
138 SDSS J164156.64+400403.5 G 16 41 56.64264 +40 04 03.5832           ~ 1 0
139 SDSS J165306.57+022318.3 G 16 53 06.57432 +02 23 18.3408           ~ 1 0
140 SDSS J171522.60+572155.8 G 17 15 22.60464 +57 21 55.8576           ~ 1 0
141 SDSS J171824.78+600517.1 G 17 18 24.786 +60 05 17.15           ~ 2 0
142 SDSS J200509.21+775640.3 G 20 05 09.21816 +77 56 40.3332           ~ 1 0
143 SDSS J200550.37+775404.5 G 20 05 50.37696 +77 54 04.5612           ~ 1 0
144 SDSS J204345.86+745949.2 G 20 43 45.86808 +74 59 49.2504           ~ 1 0
145 SDSS J211054.12+213057.9 G 21 10 54.141 +21 30 58.35           ~ 6 1
146 SDSS J211104.42+212751.9 G 21 11 04.42992 +21 27 51.9696           ~ 1 0
147 SDSS J215051.62-053837.7 G 21 50 51.62088 -05 38 37.7304           ~ 1 0
148 SDSS J215054.06-054253.4 G 21 50 54.06432 -05 42 53.4924           ~ 1 0
149 SDSS J215334.00+174113.9 GiC 21 53 34.00536 +17 41 13.9236           ~ 2 0
150 SDSS J215345.76+174358.6 rG 21 53 45.770 +17 43 58.72           ~ 5 0
151 SDSS J215347.86+174245.0 GiC 21 53 47.8677 +17 42 45.010           ~ 6 0
152 SDSS J221748.47+001241.9 AGN 22 17 48.55 +00 12 43.4   23.44 23.24 23.19   ~ 4 0
153 SDSS J222611.96+172044.9 GiC 22 26 11.9645925240 +17 20 44.960346060   19.80 18.35     ~ 4 0
154 SDSS J223854.23-054424.5 G 22 38 54.23304 -05 44 24.5508           ~ 1 0
155 SDSS J224735.43+033958.8 G 22 47 35.43336 +03 39 58.8960           ~ 1 0
156 SDSS J230158.70+155653.5 G 23 01 58.70592 +15 56 53.5560           ~ 1 0
157 SDSS J230220.83+084344.4 G 23 02 20.83464 +08 43 44.4540           ~ 1 0
158 SDSS J230556.96+623154.5 G 23 05 57.18216 +62 31 54.6600           ~ 2 0
159 SDSS J232717.70-020100.5 G 23 27 17.70648 -02 01 00.5196           ~ 1 0
160 SDSS J232731.11-020711.3 G 23 27 31.11720 -02 07 11.3700           ~ 1 0
161 SDSS J233942.53-052705.3 G 23 39 42.53064 -05 27 05.3532           ~ 1 0
162 SDSS J234118.15-091106.9 G 23 41 18.15384 -09 11 06.9468           ~ 1 0
163 SDSS J234336.25+002049.9 G 23 43 36.25968 +00 20 49.9776           ~ 1 0

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