J/ApJ/809/20 The MBH-σ relation for active galaxies (Bennert+, 2015)
A local baseline of the black hole mass scaling relations for active galaxies.
III. The MBH-σ relation.
Bennert V.N., Treu T., Auger M.W., Cosens M., Park D., Rosen R.,
Harris C.E., Malkan M.A., Woo J.-H.
<Astrophys. J., 809, 20 (2015)>
=2015ApJ...809...20B 2015ApJ...809...20B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Active gal. nuclei ; Redshifts ;
Velocity dispersion ; Spectroscopy
Keywords: accretion, accretion disks - black hole physics - galaxies: active -
galaxies: evolution - quasars: general
Abstract:
We create a baseline of the black hole (BH) mass (MBH)-stellar-velocity
dispersion (σ) relation for active galaxies, using a sample of
66 local (0.02<z<0.09) Seyfert-1 galaxies, selected from the Sloan
Digital Sky Survey (SDSS). Analysis of SDSS images yields AGN
luminosities free of host-galaxy contamination, and morphological
classification. 51/66 galaxies have spiral morphology. Out of these,
28 bulges have Sersic index n<2 and are considered candidate
pseudo-bulges, with eight being definite pseudo-bulges based on
multiple classification criteria met. Only 4/66 galaxies show signs of
interaction/merging. High signal-to-noise ratio Keck spectra provide
the width of the broad Hβ emission line free of Fe II emission
and stellar absorption. AGN luminosity and Hβ line widths are
used to estimate MBH. The Keck-based spatially resolved kinematics is
used to determine stellar-velocity dispersion within the spheroid
effective radius (σspat,reff). We find that σ can vary
on average by up to 40% across definitions commonly used in the
literature, emphasizing the importance of using self-consistent
definitions in comparisons and evolutionary studies. The MBH-σ
relation for our Seyfert-1 galaxy sample has the same intercept and
scatter as that of reverberation-mapped AGNs as well as that of
quiescent galaxies, consistent with the hypothesis that our single
epoch MBH estimator and sample selection function do not introduce
significant biases. Barred galaxies, merging galaxies, and those
hosting pseudo-bulges do not represent outliers in the MBH-σ
relation. This is in contrast with previous work, although no firm
conclusion can be drawn on this matter due to the small sample size
and limited resolution of the SDSS images.
Description:
The sample was selected from the SDSS Data Release (DR) six following
these criteria: (i) MBH>107 M☉ as estimated based on optical
luminosity and FWHM of the broad Hβ line; (ii) redshift range
0.02<z<0.09 to measure stellar kinematics via the Ca II triplet
line in the optical and to ensure that the objects are well resolved.
A total of 103 objects were observed between 2009 January and 2010 March
with the Low Resolution Imaging Spectrometer (LRIS) at Keck I using a
1" wide long slit, aligned with the host galaxy major axis as
determined from SDSS ("expPhi_r").
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 79 Sample and Derived Quantities
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See also:
II/294 : The SDSS Photometric Catalog, Release 7
(Adelman-McCarthy+, 2009)
J/ApJ/596/437 : Stellar-mass black holes in the SDSS (Chisholm+, 2003)
J/ApJ/641/L21 : Black hole mass and velocity dispersion relation
(Greene+, 2006)
J/ApJ/667/131 : Mass function of active black holes (Greene+, 2007)
J/ApJS/201/29 : Velocity dispersions in active galaxies (Harris+, 2012)
J/ApJ/831/134 : BH masses + host galaxy dispersion vel. (van den Bosch, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Target name (HHMM+DDMM)
11- 12 I2 h RAh Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 21 F5.2 s RAs Second of Right Ascension (J2000)
23 A1 --- DE- Sign of the Declination (J2000)
24- 25 I2 deg DEd Degree of Declination (J2000)
27- 28 I2 arcmin DEm Arcminute of Declination (J2000)
30- 33 F4.1 arcsec DEs Arcsecond of Declination (J2000)
35- 40 F6.4 --- z Redshift from SDSS-DR7 (Cat. II/294)
42- 44 I3 km/s sigma ? Spatially resolved stellar-velocity
dispersion within spheroid effective radius (1)
46- 50 F5.2 arcsec Re Spheroid effective radius
52- 55 I4 km/s sigmaH Second moment of broad Hβ
57- 59 I3 km/s e_sigmaH Uncertainty in sigmaH
61- 65 F5.3 10+37W L5100 Rest-frame luminosity at 5100Å
(in 1044 erg/s) (2)
67- 70 F4.2 [Msun] logMBH Log of black hole mass (uncertainty of 0.4 dex)
72- 76 A5 --- Host Host-galaxy decomposition (3)
78 A1 --- Class [CP] Classification of spheroid (4)
80- 91 A12 --- Other Alternative name from NED
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Note (1): Determined from CaT, if available, else MgIb or CaHK (Harris et al.
2012, J/ApJS/201/29) according to Equation (1) (uncertainty of
0.04 dex).
Note (2): Determined from SDSS g' band surface photometry (fiducial error
0.1 dex).
Note (3): Host-galaxy as follows:
B = "bulge only";
BD = "bulge+disk";
BDB = "bulge+disk+bar";
(M) = Indicates an interacting or merging galaxy.
Note (4): Classification as follows:
C = Classical bulge;
P = Pseudo-bulge.
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History:
From electronic version of the journal
References:
Bennert et al. Paper I 2011ApJ...726...59B 2011ApJ...726...59B
Harris et al. Paper II 2012ApJS..201...29H 2012ApJS..201...29H, Cat. J/ApJS/201/29
(End) Prepared by Tiphaine Pouvreau [CDS] 20-Sep-2017