4.7 Article

Ripping apart at the seams: the network of stripped gas surrounding M86

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 430, Issue 3, Pages 2401-2410

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt060

Keywords

galaxies: clusters: individual: M86; galaxies: clusters: intracluster medium; galaxies: elliptical and lenticular, cD; galaxies: interactions; X-rays: galaxies; X-rays: galaxies: clusters

Funding

  1. ESA Member States
  2. NASA
  3. National Aeronautics and Space Administration through Einstein Postdoctoral Fellowship [PF9-00070]
  4. National Aeronautics and Space Administration [NAS8-03060]
  5. Department of Energy [DE-AC02-76SF00515]
  6. NASA [1428053]
  7. JPL/Caltech

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We present a new study of the Virgo Cluster galaxies M86, M84, NGC 4338 and NGC 4438 using a mosaic of five separate pointings with XMM-Newton. Our observations allow for robust measurements of the temperature and metallicity structure of each galaxy along with the entire similar to 1 degrees region between these galaxies. When combined with multiwavelength observations, the data suggest that all four of these galaxies are undergoing ram pressure stripping by the intraclustermedium (ICM). The manner in which the stripped gas trailing the galaxies interacts with the ICM, however, is observably distinct. Consistent with previous observations, M86 is observed to have a long tail of similar to 1 keV gas trailing to the north-west for distances of similar to 100-150 kpc. However, a new site of similar to 0.6 keV thermal emission is observed to span to the east of M86 in the direction of the disturbed spiral galaxy NGC 4438. This region is spatially coincident with filaments of Ha emission, likely originating in a recent collision between the two galaxies. We also resolve the thermodynamic structure of stripped similar to 0.6 keV gas to the south of M84, suggesting that this galaxy is undergoing both AGN feedback and ram pressure stripping simultaneously. These four sites of stripped X-ray gas demonstrate that the nature of ram pressure stripping can vary significantly from site to site.

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