Bibcode
Bell, E. F.; McIntosh, D. H.; Gyory, Z.; Trujillo, I.; Katz, N.; Weinberg, M. D.
Referencia bibliográfica
American Astronomical Society Meeting 204, #14.03; Bulletin of the American Astronomical Society, Vol. 36, p.678
Fecha de publicación:
5
2004
Número de citas
1
Número de citas referidas
1
Descripción
We use a large sample of galaxies from the Two Micron All Sky Survey
(2MASS) and the Sloan Digital Sky Survey (SDSS) to explore the
distribution of galaxy luminosities, stellar and baryonic masses, and
sizes in the local Universe. Assuming a universally-applicable stellar
IMF, highlights include the following. i) The 'faint end slope' of the
stellar mass function is steeper than -1.1, steeper than many recent
estimates. ii) Between 1/2 and 3/4 of present-day stellar mass is in
early-type galaxies. iii) Only 8 ± 4% of baryons are in stars or
cold gas (< 104K) in galaxies, arguing for an overall low
galaxy formation efficiency. iv) The width of the galaxy scale size
distribution depends on passband, in the sense that the optical scale
size distributions are narrower than those in the near-infrared.
This work is supported by the European Community's Human Potential
Program under contract HPRN-CT-2002-00316, SISCO and JPL/NASA through
the 2MASS core science projects.