2005A&A...432...69B

Query : 2005A&A...432...69B

2005A&A...432...69B - Astronomy and Astrophysics, volume 432, 69-81 (2005/3-2)

XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured quasars.

BRUSA M., COMASTRI A., DADDI E., POZZETTI L., ZAMORANI G., VIGNALI C., CIMATTI A., FIORE F., MIGNOLI M., CILIEGI P. and ROETTGERING H.J.A.

Abstract (from CDS):

We present the results of a deep (about 80ks) XMM-Newton survey of the largest sample of near-infrared selected Extremely Red Objects (R-K>5) available to date to KS≲19.2. At the relatively bright X-ray fluxes (F_2-10 keV_>4x10–15erg/cm2/s) and near-infrared magnitude probed by the present observations, the fraction of AGN (i.e. X-ray detected) among the ERO population is small (∼3.5%); conversely, the fraction of EROs among hard X-ray selected sources is much higher (∼20%). The X-ray properties of EROs detected in our XMM-Newton observation indicate absorption in excess of 1022cm–2 in a large fraction of them. We have also considered additional samples of X-ray detected EROs available in the literature. X-ray spectral analysis of the highest S/N sources unambiguously indicates that large columns of cold gas (even >1023cm–2) are the rule rather than the exception. The X-ray, optical and near-infrared properties of those X-ray selected EROs with a spectroscopic or photometric redshift nicely match those expected for type 2 quasars, the high-luminosity, high-redshift obscured AGNs predicted in baseline XRB synthesis models. A close correlation is detected between X- and K-band fluxes. For the AGN EROs this is consistent, under reasonable assumptions, with the relation established locally between the host galaxies and their central black holes. This suggests that the majority of EROs are powered by massive black holes accreting, on average, at about 0.03-0.1 of the Eddington limit.

Abstract Copyright: ∼

Journal keyword(s): X-rays: general - galaxies: active - galaxies: high-redshift - cosmology: observations - X-rays: galaxies

VizieR on-line data: <Available at CDS (J/A+A/432/69): table1.dat table2.dat>

Nomenclature: Tables 1, 2: [BCD2005] NNN N=97 among (Nos 61-367).

Simbad objects: 100

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Number of rows : 100
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 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2086 1
2 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 840 0
3 NAME Chandra Deep Field-North reg 12 36.8 +62 13           ~ 658 0
4 SDSS J144840.61+085842.7 QSO 14 48 40.6144220376 +08 58 42.800340216       19.570   ~ 5 0
5 [BCD2005] 179 X 14 48 42.38 +09 02 03.0           ~ 1 0
6 [CVB2009] 4012 AG? 14 48 44.64 +08 57 48.2       23.730   ~ 2 0
7 [BCD2005] 118 X 14 48 45.21 +09 04 59.1       21.920   ~ 1 0
8 2XMM J144851.4+085359 G 14 48 51.480 +08 53 58.91       21.370   ~ 3 0
9 [BCD2005] 241 X 14 48 52.03 +08 59 10.9           ~ 1 0
10 [BCD2005] 282 X 14 48 54.29 +08 56 50.5       21.390   ~ 1 0
11 [BCD2005] 344 AG? 14 48 55.22 +08 54 05.5       23.36   ~ 2 0
12 [BCD2005] 315 X 14 48 56.09 +08 55 35.6       20.840   ~ 1 0
13 [BCD2005] 107 X 14 48 56.51 +09 05 29.7           ~ 1 0
14 [BCD2005] 157 ClG 14 48 56.60 +09 02 55.7           ~ 2 0
15 [BCD2005] 195 AG? 14 48 56.92 +09 01 21.9       22.630   ~ 2 0
16 [BCD2005] 72 X 14 48 59.43 +09 07 40.5       21.730   ~ 1 0
17 [BCD2005] 269 X 14 48 59.51 +08 58 01.8           ~ 1 0
18 [BCD2005] 158 X 14 49 00.04 +09 02 52.5       19.170   ~ 1 0
19 [BCD2005] 168 X 14 49 03.03 +09 02 36.1           ~ 1 0
20 [BCD2005] 244 X 14 49 03.04 +08 59 05.0       25.220   ~ 1 0
21 [BCD2005] 73 X 14 49 03.06 +09 07 19.7       22.200   ~ 1 0
22 [BCD2005] 189 X 14 49 03.15 +09 01 34.4       23.760   ~ 1 0
23 [BCD2005] 138 X 14 49 04.496 +09 03 38.69           ~ 2 0
24 [BCD2005] 103 X 14 49 05.36 +09 05 50.7           ~ 1 0
25 [BCD2005] 170 X 14 49 06.494 +09 02 37.77       21.840   ~ 2 0
26 [BCD2005] 28 X 14 49 06.68 +09 09 47.0           ~ 1 0
27 SDSS J144906.69+090207.8 QSO 14 49 06.6932021496 +09 02 07.855849320       19.900   ~ 6 0
28 [BCD2005] 350 X 14 49 08.39 +08 53 45.6       20.030   ~ 1 0
29 [BCD2005] 319 X 14 49 09.54 +08 55 13.0       20.670   ~ 1 0
30 [BCD2005] 249 X 14 49 09.683 +08 58 43.05       21.330   ~ 2 0
31 [VV2010c] J144910.1+085213 AGN 14 49 10.1 +08 52 13   21.35 20.47 19.550   ~ 5 0
32 SDSS J144910.07+085651.3 * 14 49 10.1254671288 +08 56 51.676507104     12.41 14.610   F9 4 0
33 [BCD2005] 150 X 14 49 10.45 +09 03 00.7       23.900   ~ 1 0
34 [VV2010c] J144911.5+085828 AGN 14 49 11.5 +08 58 28   22.83 21.44 20.250   ~ 5 0
35 [BCD2005] 239 AG? 14 49 14.25 +08 51 12.1       23.360   ~ 2 0
36 [BCD2005] 298 X 14 49 14.33 +08 56 25.3           ~ 1 0
37 SDSS J144914.88+090740.4 QSO 14 49 14.887 +09 07 40.64       21.030   ~ 12 0
38 [BCD2005] 326 X 14 49 15.17 +08 52 21.3       24.190   ~ 1 0
39 SDSS J144915.20+090044.1 QSO 14 49 15.2057775912 +09 00 44.079507036       20.010   ~ 11 0
40 [BCD2005] 180 X 14 49 16.67 +09 01 58.0       22.650   ~ 1 0
41 [BCD2005] 175 X 14 49 17.83 +09 02 14.7       23.850   ~ 1 0
42 [BCD2005] 301 X 14 49 18.365 +08 56 15.95       20.940   ~ 2 0
43 [BCD2005] 236 X 14 49 18.70 +08 51 12.3       21.740   ~ 1 0
44 [BCD2005] 61 X 14 49 19.73 +09 08 15.9           ~ 1 0
45 [BCD2005] 237 AG? 14 49 19.99 +08 59 12.4       24.93   ~ 2 0
46 [BCD2005] 288 X 14 49 20.03 +08 56 41.7           ~ 1 0
47 [BCD2005] 360 X 14 49 21.02 +08 53 20.3       18.290   ~ 1 0
48 [BCD2005] 77 X 14 49 22.06 +09 07 01.7       23.500   ~ 1 0
49 [BCD2005] 259 X 14 49 22.74 +08 58 20.8       22.310   ~ 1 0
50 [BCD2005] 169 X 14 49 24.13 +08 50 10.1       23.710   ~ 1 0
51 2XMM J144924.4+085938 AG? 14 49 24.434 +08 59 38.04       21.210   ~ 3 0
52 [BCD2005] 293 AG? 14 49 24.78 +08 56 29.7       22.600   ~ 2 0
53 [BCD2005] 242 X 14 49 25.23 +08 59 16.2       21.610   ~ 1 0
54 [BCD2005] 255 X 14 49 25.72 +08 58 22.5           ~ 1 0
55 [BCD2005] 337 X 14 49 26.25 +08 54 11.2       22.790   ~ 1 0
56 LEDA 1357218 G 14 49 26.6132298336 +08 58 15.953355372       15.070   ~ 14 0
57 [BCD2005] 303 X 14 49 26.68 +08 56 12.2       22.230   ~ 1 0
58 [BCD2005] 152 X 14 49 27.28 +09 03 00.1           ~ 1 0
59 2XMM J144927.9+085639 G 14 49 27.929 +08 56 39.61       21.120   ~ 3 0
60 Z 76-67 G 14 49 29.3255308056 +09 04 45.274931040   15.6   14.900   ~ 17 0
61 [BCD2005] 23 X 14 49 31.02 +09 10 33.9           ~ 1 0
62 [BCD2005] 310 AG? 14 49 32.49 +08 52 20.2       22.220   ~ 2 0
63 [BCD2005] 154 X 14 49 34.01 +09 03 00.7           ~ 1 0
64 [BCD2005] 367 X 14 49 34.12 +08 52 56.5       23.140   ~ 1 0
65 [CVB2009] XID 93 X 14 49 35.12 +09 00 31.4       23.010   ~ 2 0
66 [BCD2005] 139 X 14 49 35.22 +09 03 36.5       22.560   ~ 1 0
67 [BCD2005] 210 X 14 49 35.53 +09 00 45.4       23.880   ~ 1 0
68 [BCD2005] 186 X 14 49 35.935 +09 01 50.78       23.300   ~ 2 0
69 [BCD2005] 361 X 14 49 36.14 +08 53 29.6       21.620   ~ 1 0
70 [BCD2005] 67 X 14 49 36.50 +09 08 11.1           ~ 1 0
71 [BCD2005] 65 X 14 49 36.51 +09 08 31.7       19.740   ~ 1 0
72 [BCD2005] 129 X 14 49 36.99 +09 04 25.5       24.730   ~ 1 0
73 2XMM J144937.6+090320 AG? 14 49 37.64 +09 03 20.7       24.710   ~ 3 0
74 [BCD2005] 66 X 14 49 38.55 +09 08 02.4       21.810   ~ 1 0
75 [BCD2005] 146 X 14 49 39.58 +09 03 24.0       24.980   ~ 1 0
76 [BCD2005] 369 X 14 49 40.73 +08 52 40.1       22.780   ~ 1 0
77 SDSS J144941.01+090213.3 QSO 14 49 41.0161432704 +09 02 13.392143376       20.280   ~ 12 0
78 2XMM J144941.7+085521 G 14 49 41.720 +08 55 21.17       21.460   ~ 3 0
79 [BCD2005] 357 X 14 49 42.80 +08 53 22.0           ~ 1 0
80 [BCD2005] 362 X 14 49 43.52 +08 53 22.9           ~ 1 0
81 [BCD2005] 94 X 14 49 43.62 +09 06 03.7       22.110   ~ 1 0
82 [BCD2005] 250 X 14 49 44.45 +08 58 46.3       23.190   ~ 2 0
83 SDSS J144944.76+085926.2 AG? 14 49 44.7642495552 +08 59 26.290038912       18.480   ~ 5 0
84 [BCD2005] 289 X 14 49 46.22 +08 51 34.9       22.180   ~ 1 0
85 2XMM J144947.1+085423 G 14 49 47.115 +08 54 23.08       20.620   ~ 3 0
86 [BCD2005] 217 X 14 49 48.31 +08 59 59.4       23.300   ~ 1 0
87 2XMM J144948.7+085852 G 14 49 48.786 +08 58 52.04       21.160   ~ 3 0
88 [BCD2005] 330 X 14 49 49.13 +08 54 42.4       24.620   ~ 1 0
89 2MASS J14494919+0901557 * 14 49 49.2087064512 +09 01 56.082142956       18.600   K5V 2 0
90 [BCD2005] 370 X 14 49 51.114 +08 52 43.97       20.960   ~ 2 0
91 [BCD2005] 363 X 14 49 52.01 +08 53 14.5       23.330   ~ 1 0
92 2XMM J144956.4+090042 G 14 49 56.424 +09 00 42.60           ~ 3 0
93 [BCD2005] 122 X 14 49 57.18 +09 04 56.2       23.180   ~ 1 0
94 SDSS J144957.51+090220.0 QSO 14 49 57.504 +09 02 20.06       20.660   ~ 13 0
95 SDSS J144958.55+085912.0 QSO 14 49 58.556 +08 59 12.08   21.63 21.11 20.520   ~ 13 0
96 [BCD2005] 328 G 14 49 58.597 +08 54 47.19   21.52 20.66 19.730   ~ 3 0
97 [BCD2005] 198 X 14 49 58.98 +09 01 03.5           ~ 1 0
98 [BCD2005] 219 X 14 49 59.1864588096 +08 59 42.999579924       20.770   ~ 2 0
99 SDSS J145006.95+085924.8 QSO 14 50 06.9514507920 +08 59 24.795222720       19.550   ~ 13 0
100 CDGS 40 ClG 14 50 09.20 +09 04 39.1           ~ 8 0

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