Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging?

Details Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging? Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging?

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.312..139j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 312, Issue 1, pp. 139-150.

Astronomy and Astrophysics

Astronomy

53

Galaxies: Clusters: General, Galaxies: Elliptical And Lenticular, Cd, Galaxies: Interactions, X-Rays: Galaxies

Scientific paper

The group of galaxies RXJ1340.6+4018 has approximately the same bolometric X-ray luminosity as other bright galaxy groups and poor clusters such as the Virgo cluster. However, 70per cent of the optical luminosity of the group comes from a dominant giant elliptical galaxy, compared with 5per cent from M87 in Virgo.The second brightest galaxy in RXJ1340.6+4018 is a factor of 10 fainter (Δm12=2.5mag) than the dominant elliptical, and the galaxy luminosity function has a gap at about L*. We interpret the properties of the system as a result of galaxy merging within a galaxy group. We find that the central galaxy lies on the Fundamental Plane of ellipticals, has an undisturbed, non-cD morphology, and has no spectral features indicative of recent star formation, suggesting that the last major merger occurred >~4Gyr ago. The deviation of the system from the cluster LX-T relation in the opposite sense to most groups may be caused by an early epoch of formation of the group or a strong cooling flow. The unusual elongation of the X-ray isophotes and the similarity between the X-ray and optical ellipticities at large radii (~230kpc) suggest that both the X-ray gas and the outermost stars of the dominant galaxy are responding to an elongated dark matter distribution. RXJ1340.6+4018 may be part of a filamentary structure related to infall in the outskirts of the cluster A1774.

Affiliated with

Also associated with

No associations

Rating

Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1496246