Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21743004d&link_type=abstract
American Astronomical Society, AAS Meeting #217, #430.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Compact elliptical galaxies are extremely rare objects that populate a puzzling gap in the range of structural parameters of spheroidal galaxies. It is unclear whether they share a common origin with their giant-elliptical cousins or represent a separate population with a physically different formation history. As part of an ongoing search for compact elliptical galaxies, we analyzed ugiz imaging of the regions around ten bright elliptical galaxies to search for compact companions. The images were taken at SOAR using the SOAR Optical Imager. These observations represent the first stage of the SOAR Ultracompact Dwarf Survey (SUDS), which uses optical and infrared colors to distinguish nearby compact ellipticals from foreground stars and background galaxies. Our analysis of the SOAR photometry has identified a candidate compact elliptical galaxy located approximately 36 kpc in projection from the bright elliptical galaxy NGC1653. Further SOAR data will constrain the redshift, velocity dispersion, chemical composition, and dark matter content of this rare relic of early galaxy formation.
da Costa Luiz Nicolaci
Davy Claire M.
Hoch Z.
Maia Manuel
Marzke Ron
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