J/A+A/631/A114 Ram pressure in cluster galaxies a z=0.7 (Boselli+, 2019)
Evidence for ram pressure stripping in a cluster of galaxies at z=0.7.
Boselli A., Epinat B., Contini T., Abril-Melgarejo V., Boogaard L.A.,
Pointecouteau E., Ventou E., Brinchmann J., Carton D., Finley H.,
Michel-Dansac L., Soucail G., Weilbacher P.M.
<Astron. Astrophys. 631, A114 (2019)>
=2019A&A...631A.114B 2019A&A...631A.114B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy
Keywords: galaxies: clusters: general - galaxies: clusters: individual: CGr32 -
galaxies: evolution - galaxies: interactions - galaxies: ISM -
galaxies: high-redshift
Abstract:
MUSE observations of the cluster of galaxies CGr32
(M200∼2x1014M☉) at z=0.73 reveal the presence of two massive
star forming galaxies with extended tails of diffuse gas detected in
the [OII]3727-3729Å emission- line doublet. The tails, which have a
cometary shape with a typical surface brightness of a few
10-18erg/s/cm2/arcsec2, extend up to ∼100kpc (projected
distance) from the galaxy discs and are not associated to any stellar
component. All this observational evidence suggests that the gas has
been removed during a ram-pressure stripping event. This observation
is thus the first evidence that dynamical interactions with the
intracluster medium were active when the Universe had only half of its
present age. The density of the gas derived using the observed
[OII]3729/[OII]3726 line ratio implies a very short recombination
time, suggesting that a source of ionisation is necessary to keep the
gas ionised within the tail.
Description:
MUSE reduced datacube around the region studied in the paper, 20'x20'
covering the two galaxies and their tails, and the associated variance
datacube.
Objects:
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RA (2000) DE Designation(s)
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09 59 41.62 +02 31 29.6 CGr32 = [KLI2012] 32
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 113 2 List of fits files
fits/* . 2 Individual fits files
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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- 22 F3.1 arcsec/pix scale Scale of the image
24- 26 I3 --- Nx Number of pixels along X-axis
28- 30 I3 --- Ny Number of pixels along Y-axis
32- 35 I4 --- Nz Number of pixels along Z-axis
37- 43 F7.2 0.1nm bAWAV Lower valuer of wavelength interval
45- 51 F7.2 0.1nm BAWAV Upper valuer of wavelength interval
53- 56 F4.2 0.1nm dAWAV Wavelength resolution
58- 63 I6 Kibyte size Size of FITS file
65- 88 A24 --- FileName Name of FITS file, in subdirectory fits
90-113 A24 --- Title Title of the FITS file
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Acknowledgements:
Benoit Epinat, benoit.epinat(at)lam.fr
(End) Patricia Vannier [CDS] 18-Sep-2019