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2000MNRAS.318.1164S - Mon. Not. R. Astron. Soc., 318, 1164-1170 (2000/November-2)
Are `Bondi-Hoyle wakes' detectable in clusters of galaxies?.
SAKELLIOU I.
Abstract (from CDS):
In this paper we investigate whether Bondi-Hoyle accretion can create galactic wakes by focusing the ICM behind moving galaxies. The solution of the equations that describe this physical problem provides us with observable quantities along the wake at any time of its lifetime. We also investigate which are the best environmental conditions for the detectability of such structures in the X-ray images of clusters of galaxies.
We find that significant Bondi-Hoyle wakes can only be formed in low-temperature clusters, and that they are more pronounced behind slow-moving, relatively massive galaxies. The scalelength of these elongated structures is not very large: in the most favourable conditions a Bondi-Hoyle wake in a cluster at the redshift of z=0.05 is 12arcsec long. However, the X-ray emission of the wake is noticeably strong: the X-ray flux can reach ∼30 times the flux of the surrounding medium. Such features will be easily detectable in the X-ray images of nearby, relatively poor clusters of galaxies by the Chandra and XMM-Newton satellites.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: clusters: general - galaxies: interactions - intergalactic medium - galaxies: kinematics and dynamics - X-rays: galaxies
Simbad objects: 3
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