J/A+A/678/A122 Abell 133 Suzaku and Chandra images (Zhu+, 2023)
Investigating the outskirts of Abell 133 with Suzaku and Chandra observations.
Zhu Z., Kovacs O.E., Simionescu A., Werner N.
<Astron. Astrophys. 678, A122 (2023)>
=2023A&A...678A.122Z 2023A&A...678A.122Z (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources
Keywords: galaxies: clusters: intra cluster medium -
galaxies: clusters: individual (Abell133) - X-rays: galaxies: clusters
Abstract:
Past observations and simulations have predicted an increasingly
inhomogeneous gas distribution towards the outskirts of galaxy
clusters. However, the exact properties of such gas clumping are not
yet well known. The outskirts of Abell 133 can benefit from deep X-ray
observations, with a 2.4 Ms ultra-deep Chandra exposure, as well as
eight archival Suzaku pointings, making it a unique laboratory for
studying the clumping of the intracluster medium (ICM).
We searched for significant clump candidates with the specific aim of
identifying ones that could represent genuine ICM inhomogeneity. To
further understand how clumping biases the thermodynamic profiles, we
compared the measurements including and excluding the clump
candidates.
We jointly analyzed Chandra and Suzaku observations of Abell 133. We
selected clump candidates with at least 2σ significance based on
the Chandra image and we discussed their origins further, using
information from the DESI Legacy Imaging Surveys cluster catalog as
well as the CFHT r-band image. We performed multiple rounds of Suzaku
spectral analysis with different corrections for the underlying point
sources and clump distribution and we compared the resulting
thermodynamic profiles.
We detected 16 clump candidates using Chandra, most of which are
identified as background clusters or galaxies - as opposed to
intrinsic inhomogeneity. Even after the correction of the resolved
clumps, the entropy profile approaching the outskirts still flattens,
deviating from the power law model expected from self-similar
evolution, which implies that unresolved clumping and other complex
physics contribute to the entropy flattening in the outskirts.
Description:
The outskirts of Abell 133 benefit from deep X-ray observations, with
a 2.4Ms ultra-deep Chandra exposure as well as eight archival Suzaku
pointings, making it a unique laboratory to study the clumping of the
intracluster medium. We jointly analyzed Chandra and Suzaku
observations of Abell 133.
The fits images used to produce Fig 1 and Fig 2.
Objects:
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RA (2000) DE Designation(s)
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01 02 39.00 -21 57 14.9 Abell 133 = MCXC J0102.7-2152
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 117 2 List of fits images
fits/* . 2 Indiviual fits images
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See also:
J/ApJS/238/23 : Chandra X-ray point sources in Abell 133 (Shin+, 2018)
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- 48 A19 "datime" Obs.date Observation date
50- 55 I6 Kibyte size Size of FITS file
57- 82 A26 --- FileName Name of FITS file, in subdirectory fits
84-117 A34 --- Title Title of the FITS file
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Acknowledgements:
Zhenlin Zhu, , z.zhu(at)sron.nl
(End) Patricia Vannier [CDS] 09-Aug-2023