Olegs or Fossil Groups -- Studying Evolved Galaxy Systems

Details Olegs or Fossil Groups -- Studying Evolved Galaxy Systems Olegs or Fossil Groups -- Studying Evolved Galaxy Systems

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..975m&link_type=abstract

Chandra Proposal ID #03800069

Computer Science

Chandra Proposal Id #03800069

Scientific paper

Recent studies identified an unusual class of compact groups in which most of the optical light arises from a single dominant elliptical and yet the X-ray gas has an extent and luminosity characteristic of a bright galaxy group. These systems may be ``fossil'' groups in which the member galaxies have merged into a single, central galaxy. We propose to observe the two X-ray brightest objects, ESO3060170 and NGC1550. We will determine the total gravitating mass and the mass in heavy elements. Combined with optical photometry, we will derive the mass-to-light ratio and use the heavy element abundance to test the idea that these systems are either ``fossil'' groups or possibly a new class of optically ``dim'' systems. GTO Priority "A"

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