SIMBAD references

2019A&A...631A.114B - Astronomy and Astrophysics, volume 631A, 114-114 (2019/11-1)

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. and WEILBACHER P.M.

Abstract (from CDS):

Multi-Unit Spectroscopic Explorer (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]λλ3727-3729Å 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 with any stellar component. All this observational evidence suggests that the gas was 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 was only half its present age. The density of the gas derived using the observed [OII]λ3729/[OII]λ3726 line ratio implies a very short recombination time, suggesting that a source of ionisation is necessary to keep the gas ionised within the tail.

Abstract Copyright: © A. Boselli et al. 2019

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: CGr32 - galaxies: evolution - galaxies: interactions - galaxies: ISM - galaxies: high-redshift

VizieR on-line data: <Available at CDS (J/A+A/631/A114): list.dat fits/*>

Status at CDS:   being processed
// Examining the need for a new acronym.

Simbad objects: 11

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2020.04.03-23:18:59

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