Early-Type Galaxies on the Blue Color-Stellar Mass Sequence

Details Early-Type Galaxies on the Blue Color-Stellar Mass Sequence Early-Type Galaxies on the Blue Color-Stellar Mass Sequence

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.2215k&link_type=abstract

American Astronomical Society Meeting 207, #22.15; Bulletin of the American Astronomical Society, Vol. 37, p.1195

Astronomy and Astrophysics

Astrophysics

Scientific paper

Analysis of z=0 galaxy surveys (the Nearby Field Galaxy Survey, HYPERLEDA/SDSS/2MASS) reveals a surprisingly abundant population of E/S0 galaxies residing on the blue color-stellar mass sequence below ˜ 1011 Msun. Despite similarities in structure and dynamics to traditional red-sequence early-type galaxies, blue-sequence early types differ in their star formation histories and in other properties linked to local/global environment and gas accretion history. The origin of blue-sequence early types may involve galaxy mergers or interactions, cold-mode gas accretion, and/or the growth and transformation of disks and bulges.
This research was supported by an NSF Astronomy & Astrophysics Postdoctoral Fellowship under award AST-0401547.

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