J/A+A/521/A55 The mass function of nearby black holes (Caramete+, 2010)
The mass function of nearby black hole candidates.
Caramete L.I., Biermann P.L.
<Astron. Astrophys., 521, A55-55 (2010)>
=2010A&A...521A..55C 2010A&A...521A..55C
ADC_Keywords: Galaxy catalogs ; Redshifts
Keywords: black hole physics - galaxies: general - acceleration of particles
Abstract:
The mass function of supermassive black holes in our cosmic
neighborhood is required to understand the statistics of their
activity and consequently the origin of ultra high energy particles.
We determine a mass function of supermassive black hole candidates
from the entire sky except for the Galactic plane. Using the 2MASS
catalogue as a starting point, and the well-established correlation
between black hole mass and the bulge of old population of stars, we
derive a list of nearby black hole candidates within the redshift
range z<0.025, then perform an additional selection based on the
Hubble type. We present our resulting catalogue elsewhere. The final
list of black hole candidates above a mass of MBH>3x106M☉
has 5829 entries. We perform a Hubble-type correction to account for
selection effects, which reduces this number to 2919 black hole
candidates. Here we use this catalogue to derive the black-hole mass
function. We also correct for volume, so that this mass function is a
volume-limited distribution to redshift 0.025. The differential mass
function of nearby black hole candidates is a curved function, with a
straight simple power-law of index -3 above 108M☉ that becomes
progressively flatter towards lower masses, turns off towards a gap
below 3x106M☉, and then extends into the range where nuclear
star clusters replace black holes. The shape of this mass function can
be explained in a simple merger picture. Integrating this mass
function over the redshift range for which it has been derived, infers
a total number of black holes with z<0.025, and MBH>107M☉ of
about 2.4x104, or, if we average uniformly, 0.6 for every square
degree on the sky.
Description:
We provide here the catalog of the massive black hole used to
construct the mass function. We give: Name of galaxy, Galactic
Longitude, Galactic Latitude, Redshift, Black hole Mass, Black hole
Mass Error, Morphology and Distance.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bh.dat 111 5916 Catalog of the massive black hole used to
construct the mass function
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See also:
J/ApJ/662/808 : Cusp radius in luminous elliptical galaxies (Lauer+, 2007)
Byte-by-byte Description of file: bh.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name Name of galaxy
25- 33 F9.5 deg GLON Galactic Longitude
35- 43 F9.5 deg GLAT Galactic Latitude
45- 52 F8.6 --- z [0/0.025] Redshift
54- 63 I10 Msun Mbh Black hole mass
65- 74 I10 Msun e_Mbh Error on black hole mass
76- 89 F14.10 Mpc Dist Distance
91-111 A21 --- Morph Galaxy morphology
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Acknowledgements:
Laurentiu Ioan Caramete, lcaramete(at)spacescience.ro
(End) Laurentiu I. Caramete [ISS, Romania], Patricia Vannier [CDS] 30-Jun-2014