J/ApJ/778/188 z<0.4 sources from Chandra/SDSS (Trichas+, 2013)
Empirical links between XRB and AGN accretion using the complete z<0.4
spectroscopic CSC/SDSS catalog.
Trichas M., Green P.J., Constantin A., Aldcroft T., Kalfountzou E.,
Sobolewska M., Hyde A.K., Zhou H., Kim D.-W., Haggard D., Kelly B.C.
<Astrophys. J., 778, 188 (2013)>
=2013ApJ...778..188T 2013ApJ...778..188T
ADC_Keywords: Active gal. nuclei ; Galaxies, spectra ; X-ray sources ;
Redshifts ; Surveys
Keywords: galaxies: active; galaxies: Seyfert; quasars: emission lines;
quasars: supermassive black holes; X-rays: binaries; X-rays: galaxies
Abstract:
Striking similarities have been seen between accretion signatures of
Galactic X-ray binary (XRB) systems and active galactic nuclei (AGNs).
XRB spectral states show a V-shaped correlation between X-ray spectral
hardness and Eddington ratio as they vary, and some AGN samples reveal
a similar trend, implying analogous processes at vastly larger masses
and timescales. To further investigate the analogies, we have matched
617 sources from the Chandra Source Catalog (CSC) to Sloan Digital Sky
Survey (SDSS) spectroscopy, and uniformly measured both X-ray and
optical spectral characteristics across a broad range of AGN and
galaxy types. We provide useful tabulations of X-ray spectral slope
for broad- and narrow-line AGNs, star-forming and passive galaxies,
and composite systems, also updating relationships between optical
(Hα and [OIII]) line emission and X-ray luminosity. We further
fit broadband spectral energy distributions with a variety of
templates to estimate bolometric luminosity. Our results confirm a
significant trend in AGNs between X-ray spectral hardness and
Eddington ratio expressed in X-ray luminosity, albeit with significant
dispersion. The trend is not significant when expressed in the full
bolometric or template-estimated AGN luminosity. We also confirm a
relationship between the X-ray/optical spectral slope αox and
Eddington ratio, but it may not follow the trend predicted by analogy
with XRB accretion states.
Description:
Our sample has been obtained by cross-matching the SDSS DR7
spectroscopic sample with the Chandra Source Catalog (CSC; Rev1.1;
Evans et al. 2010, IX/45).
We have cross-correlated our spectroscopic sample with publicly
available GALEX (DR6; Morrissey et al. 2007ApJS..173..682M 2007ApJS..173..682M), UKIDSS
(DR4; Lawrence et al. 2007, II/319), Two Micron All Sky Survey
(Skrutskie et al. 2006, VII/233), Very Large Array (Becker et al.
1995ApJ...450..559B 1995ApJ...450..559B), and WISE (Wright et al. 2010AJ....140.1868W 2010AJ....140.1868W)
catalogs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 141 617 Full z<0.4 spectroscopic Chandra/SDSS catalog
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-2014)
IX/45 : The Chandra Source Catalog (CSC), Release 1.1 (Evans+ 2012)
VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
II/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJ/746/54 : Chandra X-ray observations of SDSS-DR5 QSOs (Gibson+, 2012)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/MNRAS/405/2243 : GMOS/WIYN spectroscopic catalogue (Trichas+, 2010)
J/ApJS/187/64 : The simultaneous optical-to-X-ray SED of AGNs (Grupe+, 2010)
J/A+A/512/A34 : XMM-COSMOS Type 1 AGNs (Lusso+, 2010)
J/ApJ/705/1336 : X-ray measurements of ChaMP-SDSS galaxies (Constantin+, 2009)
J/ApJ/690/644 : Properties of SDSS QSOs in the ChaMP (Green+, 2009)
J/ApJ/667/131 : Mass function of active black holes (Greene+, 2007)
J/ApJ/642/673 : IR-selected obscured AGN candidates (Polletta+, 2006)
J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)
http://www.sdss.org/ : SDSS home page
http://cxc.cfa.harvard.edu/ : Chandra X-ray observatory (CXC) home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- CXO Chandra identifier in CSC (IX/45)
(JHHMMSS.s+DDMMSS)
18- 21 F4.2 --- zsp [0.01/0.4] SDSS spectroscopic redshift
23 I1 --- Cl [0/6]? Spectroscopic classification (1)
25- 30 F6.2 Msun logMbh [4.5/9.6]?=-99.99 logarithmic estimate of
black hole mass
32- 37 F6.2 Msun e_logMbh [0.02/0.7]?=-99.99 Error in LogMbh
39- 44 F6.2 Msun logMHa [4/9]?=-99.99 log estimate of black hole mass
using Halpha emission line
46- 51 F6.2 km/s sig* [0/460]?=-99.99 Velocity dispersion of the
stellar bulge σ*
53- 58 F6.2 km/s e_sig* [0/165]?=-99.99 Error in sig*
60- 66 F7.1 ct Ct [8/10008] Net counts for the 2-8keV band
68- 72 F5.2 --- Gamma [-4/20] Power-law slope from X-ray spectral
fitting Γ
74- 78 F5.2 --- E_Gamma [0.01/19] Upper error in Gamma
81- 85 F5.2 --- e_Gamma [0.02/12.1] Lower error in Gamma
87- 92 F6.2 10+22/cm2 NH [20/24]?=-99.99 Best-fit intrinsic column
density
94-100 F7.2 10-16W/m2 Fxb [0/3747] Hard (2-8keV) X-ray flux (2)
102-108 F7.2 10-16W/m2 e_Fxb [0/3666] Lower error in Fxb (2)
110-116 F7.2 10-16W/m2 E_Fxb [0.5/3829] Upper error in Fxb (2)
118-123 F6.2 [-] Ledd [-7/0.8]?=-99.99 Log Eddington ratio (3)
125-129 F5.2 [10-7W] Lbol [38/48] Log bolometric luminosity from
best-fit SED
131-135 F5.2 [10-7W] LAGN [36/47] Log AGN luminosity from best-fit SED
137-141 F5.2 [10-7W] LSB [0/47.3] Log SB luminosity from best-fit SED
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Note (1): Spectroscopic classification as follows:
0 = Passive Galaxy (63 sources);
1 = H II (32 sources)
2 = Transition Object (52 sources);
3 = Seyfert (66 sources);
4 = LINER (Low-Ionization Narrow Emission Line Region; 36 sources);
5 = unclassified (175 sources);
6 = broad-line AGN (193 sources).
Note (2): In units of 10-13erg/s/cm2.
Note (3): The 2-8keV X-ray luminosity over bolometric luminosity.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 28-Apr-2015