J/A+A/681/A108 eROSITA view of Abell 3391/95 field (Veronica+, 2024)
The eROSITA view of the Abell 3391/95 field. Cluster outskirts and filaments.
Veronica A., Reiprich T.H., Pacaud F., Ota N., Aschersleben J., Biffi V.,
Bulbul E., Clerc N., Dolag K., Erben T., Gatuzz E., Ghirardini V., Kerp J.,
Klein M., Liu A., Liu T., Migkas K., Ramos-Ceja M.E., Sanders J.,
Spinelli C.
<Astron. Astrophys. 681, A108 (2024)>
=2024A&A...681A.108V 2024A&A...681A.108V (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Spectroscopy ; X-ray sources
Keywords: galaxies: clusters: individual: Abell 3391 -
galaxies: clusters: individual: Abell 3395 -
galaxies: groups: general - large-scale structure of Universe -
X-rays: galaxies - X-rays: galaxies: clusters
Abstract:
Many of the "missing" baryons are expected to reside in the warm-hot
intergalactic medium (WHIM) in the Cosmic-Web filaments, that connect
clusters of galaxies. SRG/eROSITA performance verification (PV)
observations covered about 15 square degrees of the A3391/95 system
and have revealed a ∼15Mpc continuous soft emission, connecting
several galaxy groups and clusters. Aim. We aim to characterize the
gas properties in cluster outskirts (R500<r<R200) and in the detected
inter-cluster filaments (>R200) and to compare them to predictions. We
performed the X-ray image and spectral analyses using the eROSITA PV
data to assess the gas morphology and properties in the outskirts and
the filaments in the directions of the previously detected Northern
and Southern Filament. We constructed the surface brightness profiles
using the particle-induced background subtracted, exposure, and
Galactic absorption corrected eROSITA products in the soft band
(0.3-2.0keV). We constrained the temperatures, metallicities, and
electron densities through X-ray spectral fitting and compared them
with the expected properties of the WHIM. We took particular care of
the foreground.
Description:
eROSITA Performance Verification data of the A3391/95 system.
eROSITA PIB-subtracted, exposure- and Galactic-absorption-corrected
image in the 0.3-2.0keV band image.
Objects:
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RA (2000) DE Designation(s)
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06 26 15.39 -53 40 51.9 A3391 = ACO 3391
06 27 31.10 -54 23 57.9 A3395 = ACO 3395
06 27 37.56 -54 26 48.12 A3395N
06 26 48.58 -54 32 45.60 A3395S
06 21 43.34 -52 41 33.00 Northern Clump = MCXC J0621.7-5242
06 30 04.80 -55 17 51.50 Little Southern Clump =
[RVP2021] Little Southern Clump
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 100 1 Informations on fits image
fits/* . 1 fits image
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See also:
J/A+A/647/A3 : Abell 3391-Abell 3395 ASKAP/EMU image (Brueggen+, 2021)
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- 54 I5 Kibyte size Size of FITS file
56- 66 A11 --- FileName Name of FITS file, in subdirectory fits
68-100 A33 --- Title Title of the FITS file
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Acknowledgements:
Angie Veronica, averonica(at)astro.uni-bonn.de
Rferences:
Veronica et al., 2022A&A...661A..46V 2022A&A...661A..46V
Biffi et al., 2022A&A...661A..17B 2022A&A...661A..17B
Reiprich et al., 2021A&A...647A...2R 2021A&A...647A...2R
Bruggen et al., 2021A&A...647A...3B 2021A&A...647A...3B, Cat. J/A+A/647/A3
(End) Patricia Vannier [CDS] 03-Nov-2023