J/MNRAS/428/3089 X-ray properties of BzK-selected galaxies (Rangel+, 2013)
X-ray properties of BzK-selected galaxies in the deepest X-ray fields.
Rangel C., Nandra K., Laird E.S., Orange P.
<Mon. Not. R. Astron. Soc., 428, 3089-3103 (2013)>
=2013MNRAS.428.3089R 2013MNRAS.428.3089R
ADC_Keywords: Galaxies, IR ; X-ray sources - Redshifts
Keywords: catalogues - galaxies: active - galaxies: nuclei -
galaxies: star formation - infrared: galaxies -
ultraviolet: galaxies - X-rays: galaxies
Abstract:
We investigate the X-ray properties of BzK-selected galaxies at z∼2
using deep X-ray data in the Chandra Deep Field-South (CDFS) and
Chandra Deep Field-North (CDFN). A subset of these BzK galaxies have
been proposed as Compton-thick active galactic nucleus (AGN)
candidates based on a high ratio of infrared (IR) to ultraviolet (UV)
star formation rates (SFRs). With the benefit of deep 24µm
observations, our sample of these IR-excess galaxies is larger than
previous studies and combined with the deepest X-ray data yield new
insights into the population. We identify 701 and 534 star-forming BzK
galaxies (sBzK galaxies) in the range z=1.2-3.0 in CDFS and CDFN,
respectively. Of these we directly detect in X-rays 49 sBzK galaxies
in CDFS and 32 sBzK galaxies in CDFN.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 112 33 X-ray properties of sBzK galaxies detected
in 2 Ms CDFN (Cat. J/AJ/126/539)
table3.dat 112 52 X-ray properties of sBzK galaxies detected
in 4 Ms CDFS (Cat. J/ApJS/195/10)
--------------------------------------------------------------------------------
See also:
B/chandra : The Chandra Archive Log (CXC, 2002)
J/AJ/126/539 : Chandra Deep Field North 2Ms catalog (Alexander+, 2003)
J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)
Byte-by-byte Description of file: table2.dat table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Name X-ray source name (1)
12 A1 --- n_Name [*] * for galaxies detected also in 1Ms CDFS
14- 17 A4 --- Type BzK subsample (3)
19- 27 F9.5 deg RAdeg Right ascension (J2000)
29- 37 F9.5 deg DEdeg Declination (J2000)
39- 42 F4.2 --- z Redshift, photometric or spectroscopic
43 A1 --- n_z [ps] photometric or spectroscopic redshift
45 A1 --- l_Fsoft Limit flag on Fsoft
46- 50 F5.2 10-19W/m2 Fsoft Soft-band flux (0.5-2keV)
(in 10-16erg/cm2/s)
52- 55 F4.2 10-19W/m2 E_Fsoft ? Error on Fsoft (upper value)
57- 60 F4.2 10-19W/m2 e_Fsoft ? Error on Fsoft (lower value)
62 A1 --- l_Fhard Limit flag on Fhard
63- 68 F6.2 10-19W/m2 Fhard Hard-band flux (2-10keV) [10-16erg/cm2/s]
70- 73 F4.2 10-19W/m2 E_Fhard ? Error on Fhard (upper value)
75- 78 F4.2 10-19W/m2 e_Fhard ? Error on Fhard (lower value)
80 A1 --- l_Lhard Limit flag on Lhard
81- 86 F6.2 10+35W Lhard Rest-frame hard-band luminosity derived
from the soft-band flux (1042erg/s)
88- 91 F4.2 10+35W E_Lhard ? Error on Lhard (upper value)
93- 96 F4.2 10+35W e_Lhard ? Error on Lhard (lower value)
98-102 F5.2 --- HR [-1/1] Hardness ratio, (H-S)/(H+S) (2)
104-107 F4.2 --- E_HR Error on HR (upper value)
109-112 F4.2 --- e_HR Error on HR (lower value)
--------------------------------------------------------------------------------
Note (1): hdfn_NNN in table2, cdfs4Ms_NNN in table3.
Note (2): where H and S are hard- and soft-band count rates, respectively.
Note (3): the sample of BzK (photometrically selected Blue/z-band/K-band)
galaxies with z∼2 is one of:
pBzK = X-ray undetected
IRX = BzK galaxies with IR excess (Compton thick AGN candidates)
IRNX = star-forming BzK galaxies (sBzKs) without IR excess
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Mar-2014