TY - JOUR
T1 - Evolution of Lyα galaxies
T2 - Stellar populations at z ∼ 0.3
AU - Finkelstein, Steven L.
AU - Cohen, Seth H.
AU - Malhotra, Sangeeta
AU - Rhoads, James E.
N1 - Publisher Copyright:
© 2009. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
PY - 2009/7/20
Y1 - 2009/7/20
N2 - We present the results of a stellar population analysis of 30 Lyα emitting galaxies (LAEs) at z ∼ 0.3, previously discovered with the Galaxy Evolution Explorer.With a few exceptions, we can accurately fit model spectral energy distributions to these objects, representing the first time this has been done for a large sample of LAEs at z < 3, a gap of ∼8 Gyr in the history of the universe. From the 26/30 LAEs which we can fit, we find an age and stellar mass range of 200 Myr-10 Gyr and 109-1011M, respectively. These objects thus appear to be significantly older and more massive than LAEs at high redshift. We also find that these LAEs show a mild trend toward higher metallicity than those at high redshift, as well as a tighter range of dust attenuation and interstellar medium geometry. These results suggest that low-redshift LAEs have evolved significantly from those at high redshift.
AB - We present the results of a stellar population analysis of 30 Lyα emitting galaxies (LAEs) at z ∼ 0.3, previously discovered with the Galaxy Evolution Explorer.With a few exceptions, we can accurately fit model spectral energy distributions to these objects, representing the first time this has been done for a large sample of LAEs at z < 3, a gap of ∼8 Gyr in the history of the universe. From the 26/30 LAEs which we can fit, we find an age and stellar mass range of 200 Myr-10 Gyr and 109-1011M, respectively. These objects thus appear to be significantly older and more massive than LAEs at high redshift. We also find that these LAEs show a mild trend toward higher metallicity than those at high redshift, as well as a tighter range of dust attenuation and interstellar medium geometry. These results suggest that low-redshift LAEs have evolved significantly from those at high redshift.
KW - Fundamental parameters
KW - Galaxies: evolution - galaxies
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U2 - 10.1088/0004-637X/700/1/276
DO - 10.1088/0004-637X/700/1/276
M3 - Article
AN - SCOPUS:85012928028
SN - 0004-637X
VL - 700
SP - 276
EP - 283
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
ER -