J/ApJ/763/133 Broad-line AGN with host galaxy colors (Trump+, 2013)
A census of broad-line active galactic nuclei in nearby galaxies: coeval star
formation and rapid black hole growth.
Trump J.R., Hsu A.D., Fang J.J., Faber S.M., Koo D.C., Kocevski D.D.
<Astrophys. J., 763, 133 (2013)>
=2013ApJ...763..133T 2013ApJ...763..133T
ADC_Keywords: Active gal. nuclei ; Photometry, SDSS ; Redshifts
Keywords: galaxies: active; galaxies: evolution; galaxies: nuclei;
quasars: general
Abstract:
We present the first quantified, statistical map of broad-line active
galactic nucleus (AGN) frequency with host galaxy color and stellar
mass in nearby (0.01<z<0.11) galaxies. Aperture photometry and z-band
concentration measurements from the Sloan Digital Sky Survey are used
to disentangle AGN and galaxy emission, resulting in estimates of
uncontaminated galaxy rest-frame color, luminosity, and stellar mass.
Broad-line AGNs are distributed throughout the blue cloud and green
valley at a given stellar mass, and are much rarer in quiescent (red
sequence) galaxies. This is in contrast to the published host galaxy
properties of weaker narrow-line AGNs, indicating that broad-line AGNs
occur during a different phase in galaxy evolution. More luminous
broad-line AGNs have bluer host galaxies, even at fixed mass,
suggesting that the same processes that fuel nuclear activity also
efficiently form stars. The data favor processes that simultaneously
fuel both star formation activity and rapid supermassive black hole
accretion. If AGNs cause feedback on their host galaxies in the nearby
universe, the evidence of galaxy-wide quenching must be delayed until
after the broad-line AGN phase.
Description:
We select samples of broad-line AGNs and inactive galaxies from the
SDSS. We visually inspected the spectra of all broad emission line
AGNs to ensure that they are correctly classified.
Galaxy stellar masses come from the MPA-JHU value-added catalog,
derived according to Kauffmann et al. (2003MNRAS.341...33K 2003MNRAS.341...33K).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 162 561 Raw and corrected measurements of
broad-line AGN hosts
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/421/1569 : Properties of 18286 SDSS radio galaxies (Best+, 2012)
J/A+A/525/A127 : Properties of X-ray selected AGNs (Tasse+, 2011)
J/ApJ/739/57 : Ultra hard X-ray AGNs in the Swift/BAT survey (Koss+, 2011)
J/ApJ/733/60 : Accretion rate of AGNs from COSMOS surveys (Trump+, 2011)
J/ApJ/720/368 : Color-magnitude relations of galaxies in CDFs (Xue+, 2010)
J/ApJ/711/284 : Galaxy Zoo: AGN host galaxies (Schawinski+, 2010)
J/ApJ/691/705 : AGN host galaxy morphologies in COSMOS (Gabor+, 2009)
J/AJ/131/84 : AGNs and host galaxies information (Vanden Berk+, 2006)
http://www.sdss.org/ : SDSS home page
http://www.mpa-garching.mpg.de/SDSS/DR7/ : MPA-JHU DR7 release home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 I18 --- objID SDSS photometric objID
20- 29 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
31- 40 F10.6 deg DEdeg Declination in decimal degrees (J2000)
42- 47 F6.4 --- z [0.01/0.2] Redshift
49- 54 F6.2 mag zMag Absolute z band AB magnitude (1)
56- 60 F5.2 mag umag [14.5/22.9] Raw u' band AB magnitude (1)
62- 66 F5.2 mag umag0 Corrected u' band AB magnitude (1)
68- 72 F5.2 mag deltu δ(u) (2)
74- 78 F5.2 mag gmag Raw g' band AB magnitude (1)
80- 84 F5.2 mag gmag0 Corrected g' band AB magnitude (1)
86- 90 F5.2 mag deltg δ(g) (2)
92- 96 F5.2 mag rmag Raw r' band AB magnitude (1)
98-102 F5.2 mag rmag0 Corrected r' band AB magnitude (1)
104-108 F5.2 mag deltr δ(r) (2)
110-114 F5.2 mag imag Raw i' band AB magnitude (1)
116-120 F5.2 mag imag0 Corrected i' band AB magnitude (1)
122-126 F5.2 mag delti δ(i) (2)
128-132 F5.2 mag zmag [11.5/16.4] Raw z' band AB magnitude (1)
134-138 F5.2 mag zmag0 Corrected z' band AB magnitude (1)
140-144 F5.2 mag deltz δ(z) (2)
146-150 F5.2 mag zconc z-band concentration
152-156 F5.2 mag u-z Corrected u-z color index (1)
158-162 F5.2 [Msun] Mass [9.3/11.5] Log of stellar mass
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Note (1): All magnitudes are K-corrected to z=0.05.
Note (2): δ(m) is the offset from the relationship between inner
magnitude, outer magnitude, and z-band concentration for the inactive
galaxy population, and is given by Equation 3.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 21-Oct-2014