Bibcode
Elmegreen, Debra M.; Elmegreen, B. G.; Sanchez-Almeida, J.; Munoz-Tuñon, C.; Putko, J.; Dewberry, J.
Referencia bibliográfica
American Astronomical Society, AAS Meeting #219, #244.09
Advertised on:
1
2012
Número de citas
0
Número de citas referidas
0
Descripción
Tadpole galaxies have a giant star-forming region at the end of an
elongated intensity distribution. The origin of this asymmetric
structure is not known, although suggestions range from ram pressure to
mergers. We use SDSS data to determine the ages, masses, surface
densities, and star formation rates of the heads and tails in 13 local
tadpoles identified from Kiso and Michigan surveys and compare them to
tadpoles previously surveyed in the Hubble Ultra Deep Field. The young
stellar mass in the head scales linearly with restframe galaxy
luminosity, ranging from 105 Mo at galaxy U = -13
mag to 109 Mo at U = -20 mag. The young star
surface density in the head is relatively small for local tadpoles, 1
Mo pc-2, but much larger for high redshift
tadpoles, 10 - 100 Mo pc-2. The star formation
rate per unit area increases with increasing redshift by 2 orders of
magnitude from z=0 to 3.
J. Putko was supported through NSF REU grant AST-1005024, and J.
Dewberry through the Vassar URSI program.