Bibcode
Lowenthal, James D.; Bershady, M. A.; Gallego, J.; Guzman, R.; Hameed, S.; Koo, D. C.
Referencia bibliográfica
American Astronomical Society, AAS Meeting #216, #307.02; Bulletin of the American Astronomical Society, Vol. 41, p.867
Advertised on:
5
2010
Número de citas
0
Número de citas referidas
0
Descripción
We present new infrared images and photometry with Spitzer/IRAC + MIPS
of over 20 luminous compact blue galaxies (LCBGs), half at z 0 and half
at z 0.75. LCBGs are extreme starburst galaxies with strong evolution,
providing up to 40% of the observed increase in global star formation
rate density between z=0 and z=1. They are important to study as they
not only play a vital role in galaxy evolution, but they are also
excellent local analogs for distant starburst galaxies, such as Lyman
break galaxies at z>3. Almost all of our LCBGs are detected in IRAC,
and most are also detected in MIPS 24um. We fit multi-component stellar
population synthesis models to the full spectral energy distributions
and set new constraints on both the underlying stellar populations in
these low-mass, low-metallicity, high specific star formation
rate-systems and on the presence of additional star formation hidden
from the optical by obscuring dust. We combine the Spitzer data with
high-resolution rest-UV and -optical imaging from HST to characterize
the spatial distribution of star formation and to assess the incidence
of major mergers driving the starbursts.