J/ApJ/742/68 HST observations of low-mass BH host galaxies (Jiang+, 2011)
The host galaxies of low-mass black holes.
Jiang Y.-F., Greene J.E., Ho L.C., Xiao T., Barth A.J.
<Astrophys. J., 742, 68 (2011)>
=2011ApJ...742...68J 2011ApJ...742...68J
ADC_Keywords: Active gal. nuclei ; Photometry, HST ; Morphology ; Redshifts
Keywords: galaxies: active - galaxies: bulges - galaxies: nuclei -
galaxies: photometry - galaxies: Seyfert - galaxies: structure
Abstract:
Using Hubble Space Telescope observations of 147 host galaxies of
low-mass black holes (BHs), we systematically study the structures and
scaling relations of these active galaxies. Our sample is selected to
have central BHs with virial masses of ∼105-106M☉. The host
galaxies have total I-band magnitudes of -23.2<MI←18.8mag and bulge
magnitudes of -22.9<MI←16.1mag. Detailed bulge-disk-bar
decompositions with GALFIT show that 93% of the galaxies have extended
disks, 39% have bars, and 5% have no bulges at all at the limits of
our observations. Based on the Sersic index and bulge-to-total ratio,
we conclude that the majority of the galaxies with disks are likely to
contain pseudobulges and very few of these low-mass BHs live in
classical bulges. The fundamental plane of our sample is offset from
classical bulges and ellipticals in a way that is consistent with the
scaling relations of pseudobulges. The sample has smaller velocity
dispersion at fixed luminosity in the Faber-Jackson plane compared
with classical bulges and elliptical galaxies. The galaxies without
disks are structurally more similar to spheroidals than to classical
bulges according to their positions in the fundamental plane,
especially the Faber-Jackson projection. Overall, we suggest that BHs
with mass ≲106M☉ live in galaxies that have evolved secularly
over the majority of their history. A classical bulge is not a
prerequisite to host a BH.
Description:
In order to study the detailed structure of the host galaxies, we were
awarded a snapshot survey with WFPC2 on HST in cycle 16. A total of
147 galaxies from Greene & Ho (2007, Cat. J/ApJ/670/92) were observed
during this program. Details of the observations are summarized in
Table 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 67 147 Observations summary
table2.dat 101 147 Components of the galaxies
table3.dat 32 53 Galaxies with bar structure
table4.dat 33 4 Galaxies with compact nuclear components
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/407/2399 : AGN activity and black hole mass (McKernan+, 2010)
J/ApJ/716/942 : Bulges of nearby galaxies with Spitzer (Fisher+, 2010)
J/ApJ/690/20 : Models of the AGN and BH populations (Shankar+, 2009)
J/AJ/135/928 : The black hole-bulge relationship (Shen+, 2008)
J/ApJS/176/355 : AGN X-Ray emission and black holes (Kelly+, 2008)
J/ApJS/168/1 : Black hole mass estimates (Kelly+, 2007)
J/ApJ/667/131 : Mass function of active black holes (Greene+, 2007)
J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007)
J/ApJ/641/L21 : BH mass and velocity dispersion relation (Greene+, 2006)
J/ApJ/613/682 : AGN masses & broad-line region sizes (Peterson+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Abridged SDSS galaxy name (HHMM+DDMM)
11- 14 A4 --- --- [SDSS]
15- 33 A19 --- SDSS Full SDSS galaxy name (JHHMMSS.ss+DDMMSS.s)
35- 40 F6.4 --- z Redshift
42- 47 F6.4 mag AI I band galactic extinction
49- 58 A10 "YYYY/MM/DD" Date Date of the observation
60- 63 F4.2 arcsec/kpc Scale Physical scale of image
65- 67 F3.1 [Msun] logM Log of virial black hole mass
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Abridged SDSS galaxy name (HHMM+DDMM)
11- 14 F4.1 mag I(AGN) AGN component nonparametric F814W magnitude
16- 19 F4.1 mag I(gal) Host galaxy nonparametric F814W magnitude
21 A1 --- l_Ip(AGN) Limit flag on Ip(AGN)
23- 26 F4.1 mag Ip(AGN) AGN component parametric F814W magnitude
28- 31 F4.2 mag e_Ip(AGN) ? Uncertainty in AGNPmag
33- 37 F5.2 kpc r(disk) Typical exponential extended disk size
39- 43 F5.2 kpc e_r(disk) ? Uncertainty in r(disk)
45 A1 --- l_I(disk) Limit flag on I(disk)
47- 51 F5.2 mag I(disk) Exponential extended disk parametric magnitude
53- 56 F4.2 mag e_I(disk) ? Uncertainty in I(disk)
58- 62 A5 --- n Sersic index of the bulge (1)
64- 67 F4.2 kpc r(b) Bulge component effective radius in Sersic model
69- 73 F5.3 kpc e_r(b) ? Uncertainty in r(b)
75 A1 --- l_I(b) Limit flag on I(b)
77- 81 F5.2 mag I(b) Bulge parametric F814W magnitude
83- 86 F4.2 mag e_I(b) ? Uncertainty in a I(b)
88 A1 --- l_B/G Limit flag on B/G
90- 93 F4.2 --- B/G Bulge to total host galaxy luminosity ratio
95-101 A7 --- Other Other components ("bar" or "nuclear")
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Note (1): For the bulge component in the best GALFIT model. Multiple values
mean that GALFIT cannot distinguish which one is better.
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Galaxy abridged SDSS name (HHMM+DDMM)
11- 15 F5.2 mag Imag I-band (F814W) magnitude (1)
17- 20 F4.2 mag e_Imag Imag uncertainty
22- 27 F6.3 kpc re Effective size (1)
29- 33 F5.3 kpc e_re re uncertainty
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Note (1): of the bar component for table 3, or of the nuclear component for
table 4.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 22-Apr-2013