J/ApJ/756/116 FR II radio galaxies from MaxBCG (Antognini+, 2012)
The lifetime and powers of FR IIs in galaxy clusters.
Antognini J., Bird J., Martini P.
<Astrophys. J., 756, 116 (2012)>
=2012ApJ...756..116A 2012ApJ...756..116A
ADC_Keywords: Clusters, galaxy ; Galaxies, radio
Keywords: galaxies: active; galaxies: clusters: general; galaxies: evolution;
galaxies: jets
Abstract:
We have identified and studied a sample of 151 FR IIs found in
brightest cluster galaxies (BCGs) in the MaxBCG cluster catalog with
data from FIRST and NVSS. We have compared the radio luminosities and
projected lengths of these FR IIs to the projected length distribution
of a range of mock catalogs generated by an FR II model and estimate
the FR II lifetime to be 1.9x108yr. The uncertainty in the lifetime
calculation is a factor of two, primarily due to uncertainties in the
intracluster medium (ICM) density and the FR II axial ratio. We
furthermore measure the jet power distribution of FR IIs in BCGs and
find that it is well described by a log-normal distribution with a
median power of 1.1x1037W and a coefficient of variation of 2.2.
These jet powers are nearly linearly related to the observed
luminosities, and this relation is steeper than many other estimates,
although it is dependent on the jet model. We investigate correlations
between FR II and cluster properties and find that galaxy luminosity
is correlated with jet power. This implies that jet power is also
correlated with black hole mass, as the stellar luminosity of a BCG
should be a good proxy for its spheroid mass and therefore the black
hole mass. Jet power, however, is not correlated with cluster
richness, nor is FR II lifetime strongly correlated with any cluster
properties. We calculate the enthalpy of the lobes to examine the
impact of the FR IIs on the ICM and find that heating due to adiabatic
expansion is too small to offset radiative cooling by a factor of at
least six. In contrast, the jet power is approximately an order of
magnitude larger than required to counteract cooling. We conclude that
if feedback from FR IIs offsets cooling of the ICM, then heating must
be primarily due to another mechanism associated with FR II expansion.
Description:
Large extended radio sources have been well studied for many decades.
An early morphological classification scheme of double-lobed radio
sources was developed by Fanaroff & Riley (1974MNRAS.167P..31F 1974MNRAS.167P..31F).
Core-brightened sources are classified as Type I sources (FR Is) and
edge-brightened sources are classified as Type II sources (FR IIs).
Although the classification is purely morphological, FR IIs are
generally more luminous than FR Is.
In this work we measure the ages and powers of 151 FR IIs in brightest
cluster galaxies (BCGs) from the MaxBCG galaxy cluster catalog of
Koester et al. (2007, Cat. J/ApJ/660/239). We selected radio sources
associated with the BCGs of these galaxy clusters using the 2008 July
16 version of the Faint Images of the Radio Sky at Twenty-cm (FIRST)
radio catalog (White et al. 1997, see Cat. VIII/90).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 151 Properties of the FR II sample used
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See also:
VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/ApJ/746/178 : The augmented maxBCG cluster catalog (Rykoff+, 2012)
J/AJ/141/88 : Galaxy cluster environments of radio sources (Wing+, 2011)
J/ApJ/740/59 : 1.4GHz & X-ray sources in 12 galaxy clusters (Hart+, 2011)
J/MNRAS/415/1013 : FR II radio galaxies in SDSS (Koziel-Wierzbowska+, 2011)
J/ApJ/703/2232 : Weak lensing of SDSS galaxy clusters. III. (Sheldon+, 2009)
J/ApJ/686/859 : Radio sources at 0.327, 1.4, 4.5, 8.5GHz (Birzan+, 2008)
J/ApJ/660/239 : MaxBCG cat. of 13823 SDSS galaxy clusters (Koester+, 2007)
J/ApJS/167/1 : Galaxy groups and clusters from SDSS (Berlind+, 2006)
J/MNRAS/329/227 : 2dF Galaxy Redshift Survey. II. (Sadler+, 2002)
J/ApJ/448/521 : Radio powers in radio galaxies (Zirbel+, 1995)
J/MNRAS/204/151 : Bright radio sources at 178 MHz (3CRR) (Laing+ 1983)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- ID SDSS identifier (JHHMMSS.s+DDMMSS.s)
20- 24 F5.3 --- z [0.1/0.3] BCG redshift
26- 27 I2 --- N200 [10/63] Cluster richness
29- 33 F5.2 10+10Lsun Lr [2.6/17.6] BCG r band luminosity
35- 39 F5.2 10+10Lsun Lg [3.2/21.4] BCG g band luminosity
41- 45 F5.1 mJy FNVSS [9.3/891] NVSS total 1.4GHz flux density
47- 50 F4.1 10+24W/Hz PNVSS [0.4/72] NVSS specific radio luminosity
52- 56 F5.1 kpc l1 Projected length of lobe one
58- 62 F5.1 kpc l2 Projected length of lobe two
64- 67 F4.1 arcsec a1 [9/90] Angular separation of lobe one
69- 73 F5.1 arcsec a2 [9/116] Angular separation of lobe two
75- 77 A3 --- Vlim [Yes/No ] FR II is in volume-limited sample?
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-Mar-2014