J/A+A/647/A50 Radio halos in mass selected clusters (Cuciti+, 2021)
Radio halos in a mass-selected sample of 75 galaxy clusters.
I. Sample selection and data analysis.
Cuciti V., Cassano R., Brunetti G., Dallacasa D., van Weeren R.J.,
Giacintucci S., Bonafede A., de Gasperin F., Ettori S., Kale R.,
Pratt G.W., Venturi T.
<Astron. Astrophys. 647, A50 (2021)>
=2021A&A...647A..50C 2021A&A...647A..50C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Radio sources
Keywords: galaxies: clusters: general -
galaxies: clusters: intracluster medium -
radiation mechanisms: non-thermal
Abstract:
Radio halos are synchrotron diffuse sources at the centre of a
fraction of galaxy clusters. The study of large samples of clusters
with adequate radio and X-ray data is necessary to investigate the
origin of radio halos and their connection with the cluster dynamics
and formation history. The aim of this paper is to compile a
well-selected sample of galaxy clusters with deep radio observations
to perform an unbiased statistical study of the properties of radio
halos. We selected 75 clusters with M≥6x1014M☉ at z=0.08-0.33
from the Planck Sunyaev-Zel'dovich catalogue. Clusters without
suitable radio data were observed with the Giant Metrewave Radio
Telescope and/or the Jansky Very Large Array to complete the
information about the possible presence of diffuse emission. We used
archival Chandra X-ray data to derive information on the clusters'
dynamical states. This observational campaign led to the detection of
several cluster-scale diffuse radio sources and candidates that
deserve future follow-up observations. Here we summarise their
properties and add information resulting from our new observations.
For the clusters where we did not detect any hint of diffuse emission,
we derived new upper limits to their diffuse flux. We have built the
largest mass-selected (>80% complete in mass) sample of galaxy
clusters with deep radio observations available to date.
Description:
Radio FITS images of the clusters analysed in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 130 35 List of sources with images
(from table1 of the paper)
list.dat 128 39 List of fits images
fits/* . 39 Individual fits images
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Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Source name
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 29 F4.1 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 41 F4.1 arcsec DEs Declination (J2000)
43- 47 F5.3 --- z Redshift
49- 53 F5.2 10+14Msun M500 Mass enclosed in a sphere with radius R500
55- 58 F4.2 10+14Msun E_M500 Error on M500 (upper value)
60- 63 F4.2 10+14Msun e_M500 Error on M500 (lower value)
65- 68 I4 kpc R500 Radius within which the mean mass
over-density of the cluster is 500 times
the cosmic critical density at the
cluster redshift
70- 78 A9 --- Radio Radio info (1)
80 A1 --- l_P1.4GHz Lower limit on P1.4GHz
81- 85 F5.2 10+24W/Hz P1.4GHz ? k-corrected radio power at 1.4GHz
88- 91 F4.2 10+24W/Hz e_P1.4GHz ? Error on P1.4GHz
94-111 A18 --- FileName Name of fits file
113-130 A18 --- FileName2 Name of second fits file
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Note (1): Radio info as follows:
RH = Radio Halo
MH = Mini Halo
UL = Upper Limit
US = Ultra Steep
c = candidate
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 55 A26 "datime" Obs.Date Observation date
57- 67 E11.6 Hz Obs.Freq Observed frequency
69- 74 I6 Kibyte size Size of FITS file
76- 93 A18 --- FileName Name of FITS file, in subdirectory fits
95-128 A34 --- Title Title of the FITS file
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Acknowledgements:
Virginia Cuciti, vcuciti(at)hs.uni-hamburg.de
(End) Virginia Cuciti [Univ. Hamburg], Patricia Vannier [CDS] 15-Feb-2021