J/ApJ/704/1586 BCGs with radio AGN (Sun, 2009)
Every BCG with a strong radio AGN has an X-ray cool core: is the cool
core-noncool core dichotomy too simple?
Sun M.
<Astrophys. J., 704, 1586-1604 (2009)>
=2009ApJ...704.1586S 2009ApJ...704.1586S
ADC_Keywords: Clusters, galaxy ; Active gal. nuclei ; X-ray sources
Keywords: cooling flows - galaxies: active - galaxies: clusters: general -
radio continuum: galaxies - X-rays: galaxies -
X-rays: galaxies: clusters
Abstract:
The radio active galactic nucleus (AGN) feedback in X-ray cool cores
has been proposed as a crucial ingredient in the evolution of baryonic
structures. However, it has long been known that strong radio AGNs
also exist in "noncool core" clusters, which brings up the question
whether an X-ray cool core is always required for the radio feedback.
In this work, we present a systematic analysis of brightest cluster
galaxies (BCGs) and strong radio AGNs in 152 groups and clusters from
the Chandra archive. All 69 BCGs with radio AGN more luminous than
2x1023W/Hz at 1.4GHz are found to have X-ray cool cores. BCG cool
cores can be divided into two classes: the large cool core (LCC) class
and the corona class. As examples of the corona class, we also present
detailed analyses of a BCG corona associated with a strong radio AGN
(ESO 137-006 in A3627) and one of the faintest coronae known (NGC 4709
in the Centaurus cluster).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 25 152 Sample of 152 groups and clusters
table2.dat 130 55 Galaxies in the corona class with
L1.4GHz>1024W/Hz AGNs
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/ApJS/195/15 : Luminosity profiles of BCGs (Donzelli+, 2011)
J/A+A/425/367 : REFLEX Galaxy Cluster Survey catalogue (Boehringer+, 2004)
J/AJ/125/478 : HST imaging of brightest cluster galaxies (Laine+, 2003)
J/MNRAS/318/333 : Extended ROSAT Bright Cluster Sample (Ebeling+ 2000)
J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000)
J/MNRAS/306/857 : ROSAT Brightest Cluster Sample. III. (Crawford+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name System designation
17- 22 F6.4 --- z NED redshift
24- 25 I2 --- N The number of Chandra observation(s)
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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- 23 A23 --- Gal Galaxy name
25- 35 A11 --- Name Cluster name
37- 41 F5.2 [Lsun] logLKs 2MASS Ks-band luminosity of the galaxy (1)
43- 47 F5.2 [W/Hz] logL1.4 1.4GHz luminosity of the galaxy (2)
49 A1 --- l_Lx Limit flag on Lx
50- 54 F5.3 10+34W Lx The rest-frame 0.5-2keV luminosity in unit of
1041erg/s
56- 60 F5.3 10+34W E_Lx ? Positive error in Lx
62- 66 F5.3 10+34W e_Lx ? Negative error in Lx
68- 71 F4.2 keV kT ? Plasma temperature
73- 76 F4.2 keV E_kT ? Positive error in kT
78- 81 F4.2 keV e_kT ? Negative error in kT
83 A1 --- f_kT [o] o: other kT value (0.81±0.08keV)
85-123 A39 --- Note Note (3)
124 A1 --- u_LAGN [~] Uncertainty flag on LAGN
125-130 E6.2 10-7W LAGN ? The AGN luminosity (measured in the rest
frame 0.5-10keV), if it is higher than
1041erg/s
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Note (1): 2MASS Ks band luminosity of the galaxy as shown as
log(LKs/L☉), with MK☉=3.39mag.
Note (2): 1.4GHz luminosity of the galaxy from NVSS (Cat. VIII/65) or
SUMSS (Sydney University Molonglo Sky Survey (SUMSS, Cat. VIII/81;
Bock et al. 1999AJ....117.1578B 1999AJ....117.1578B)), assuming a spectral index of -0.8.
Note (3): brightest cluster galaxies are marked as "BCG". Most of the
non-BCGs are NAT (narrow-angle tail) sources. "code 3" refers to "soft
X-ray sources" defined in Sun et al., 2007ApJ...657..197S 2007ApJ...657..197S, and Section 3.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 28-Nov-2011