2016ApJ...831..203P

Query : 2016ApJ...831..203P

2016ApJ...831..203P - Astrophys. J., 831, 203-203 (2016/November-2)

X-ray detected active galactic nuclei in dwarf galaxies at 0 < z < 1.

PARDO K., GOULDING A.D., GREENE J.E., SOMERVILLE R.S., GALLO E., HICKOX R.C., MILLER B.P., REINES A.E. and SILVERMAN J.D.

Abstract (from CDS):

We present a sample of accreting supermassive black holes (SMBHs) in dwarf galaxies at z<1. We identify dwarf galaxies in the NEWFIRM Medium Band Survey with stellar masses of M*<3×109 M☉ that have spectroscopic redshifts from the DEEP2 survey and lie within the region covered by deep (flux limit of ∼5×10–17\mbox–6×10–16 erg cm–2\s–1) archival Chandra X-ray data. From our sample of 605 dwarf galaxies, 10 exhibit X-ray emission consistent with that arising from active galactic nucleus (AGN) activity. If black-hole mass scales roughly with stellar mass, then we expect that these AGNs are powered by SMBHs with masses of ∼105\mbox–106 M☉ and typical Eddington ratios of ∼5%. Furthermore, we find an AGN fraction consistent with extrapolations of other searches of ∼0.6%\mbox–3% for 109 M☉\leqslantM*\leqslant3×109 M☉ and 0.1<z<0.6. Our AGN fraction is in good agreement with a semi-analytic model, suggesting that, as we search larger volumes, we may use comparisons between observed AGN fractions and models to understand seeding mechanisms in the early universe.

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

Journal keyword(s): galaxies: active - galaxies: dwarf - X-rays: galaxies - X-rays: galaxies

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1310 1
2 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2155 2
3 NGC 404 LIN 01 09 27.02 +35 43 05.3   12.56 11.73     ~ 478 0
4 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5847 1
5 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2093 1
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17478 0
7 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1185 1
8 [BPG2011] irac178808 G 14 16 59.17711 +52 23 54.9391   21.27   20.251 19.890 ~ 4 0
9 [BPG2011] irac173352 1 G 14 17 06.07 +52 30 16.5   23.63   23.21 22.59 ~ 3 0
10 [BPG2011] irac167192 1 G 14 17 21.48638 +52 33 23.6884   22.85   22.13 21.90 ~ 3 0
11 CFRS 14.1432 AGN 14 17 30.15 +52 30 33.3   21.417   20.655 20.273 ~ 8 0
12 DEEP2-GRS 12008183 G 14 17 36.6542 +52 29 38.552   24.26   23.75 23.02 ~ 5 0
13 [BPG2011] irac159831 G 14 17 36.90677 +52 37 47.9770   24.58   23.95 23.48 ~ 3 0
14 DEEP2-GRS 12003743 G 14 17 43.1292 +52 24 54.045   23.66   23.19 22.90 ~ 4 0
15 [BPG2011] irac157031 1 G 14 17 51.66197 +52 37 52.5065   22.41   21.65 21.40 ~ 4 0
16 [BPG2011] irac156917 G 14 17 57.13868 +52 36 52.4459   23.60   23.11 22.70 ~ 3 0
17 [BPG2011] irac165231 G 14 17 58.39562 +52 27 50.5688   21.533   20.507 20.157 ~ 3 0
18 DEEP2-GRS 12007684 G 14 18 00.66 +52 28 23.7   24.82   23.75 23.38 ~ 2 0
19 CXOEGS J141803.2+524222 AG? 14 18 03.26478 +52 42 22.5887   20.296   19.569 19.248 ~ 6 0
20 [LNG2009] egs-0496 G 14 18 06.26552 +52 38 39.9977   21.77   20.62 20.25 ~ 4 0
21 [BPG2011] irac155978 G 14 18 06.63215 +52 35 53.9574   20.859   19.844 19.491 ~ 4 0
22 NMBS A33915 G 14 18 07.79736 +52 44 23.7276   20.253   19.293 18.923 ~ 6 0
23 [BPG2011] irac149654 G 14 18 11.95323 +52 41 46.6308   24.34   23.87 23.07 ~ 3 0
24 [BPG2011] irac150049 G 14 18 22.11310 +52 39 17.6625   24.61   23.65 23.30 ~ 4 0
25 [BPG2011] irac151309 G 14 18 26.37504 +52 37 09.2707   24.70   24.0 23.39 ~ 3 0
26 [BPG2011] irac145058 G 14 18 36.17142 +52 41 38.5432   24.12   22.85 22.51 ~ 3 0
27 [BPG2011] irac147706 G 14 18 38.35898 +52 38 24.3915   20.884   20.058 19.718 ~ 3 0
28 [BPG2011] irac146463 AGN 14 18 47.53914 +52 37 49.3301   24.03   23.17 23.11 ~ 3 0
29 CANDELS EGS F160W J141851.2+524456.5 G 14 18 51.23551 +52 44 56.3643   23.56   22.46 22.12 ~ 6 0
30 CANDELS EGS F160W J141856.5+524254.9 G 14 18 56.53586 +52 42 54.8811   23.96   23.06 22.54 ~ 7 0
31 CANDELS EGS F160W J141858.2+524418.0 G 14 18 58.23848 +52 44 17.9117   22.65   21.265 20.942 ~ 6 0
32 NAME Extended Groth Strip reg 14 19 +52.8           ~ 829 0
33 CANDELS EGS F160W J141902.9+524614.9 G 14 19 02.86656 +52 46 15.1324   23.26   22.77 22.26 ~ 7 0
34 CANDELS EGS F160W J141904.3+524502.8 G 14 19 04.29936 +52 45 02.6972   23.93   22.82 22.46 ~ 6 0
35 CANDELS EGS F160W J141908.8+524619.3 G 14 19 08.81663 +52 46 19.0952   22.11   21.21 20.85 ~ 5 0
36 [BPG2011] irac138491 G 14 19 09.69024 +52 41 35.1136   23.90   22.78 22.52 ~ 3 0
37 CANDELS EGS F160W J141911.2+524352.9 G 14 19 11.17495 +52 43 52.8039   19.778   19.090 18.808 ~ 8 0
38 CANDELS EGS F160W J141916.3+524944.7 G 14 19 16.36202 +52 49 44.4243   23.22   22.55 22.03 ~ 7 0
39 CANDELS EGS F160W J141916.9+524656.6 AGN 14 19 16.88897 +52 46 56.5021   23.08   21.98 21.69 ~ 9 0
40 CANDELS EGS F160W J141918.0+524600.6 G 14 19 18.04162 +52 46 00.6971   23.97   22.84 22.55 ~ 6 0
41 CANDELS EGS F160W J141918.2+524619.4 G 14 19 18.20421 +52 46 19.0458   22.67   21.75 21.46 ~ 7 0
42 CANDELS EGS F160W J141924.7+524949.1 G 14 19 24.69512 +52 49 48.7624   24.05   23.59 23.26 ~ 5 0
43 CANDELS EGS F160W J141926.5+524641.5 G 14 19 26.52003 +52 46 41.0896   22.55   21.71 21.53 ~ 6 0
44 CANDELS EGS F160W J141928.0+524600.2 G 14 19 27.95349 +52 46 00.0126   25.6   23.68 23.9 ~ 6 0
45 CANDELS EGS F160W J141928.4+524703.7 G 14 19 28.44949 +52 47 03.2300   22.356   22.41 21.95 ~ 7 0
46 [BPG2011] irac129522 G 14 19 32.29221 +52 46 16.2208   23.7   22.78 22.85 ~ 4 0
47 CANDELS EGS F160W J141937.3+524757.6 AGN 14 19 37.25023 +52 47 57.3231   20.869   19.856 19.281 ~ 6 0

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