Bibcode
Sánchez de Miguel, A.; Gallego, J.; Villar, V.; Zamorano, J.; Acosta-Pulido, J. A.; Pérez-Gonzalez, P. G.; Barro, G.
Bibliographical reference
Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held in Madrid, September 13 - 17, 2010, Eds.: M. R. Zapatero Osorio, J. Gorgas, J. Maíz Apellániz, J. R. Pardo, and A. Gil de Paz., p. 328-332
Advertised on:
11
2011
Citations
0
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0
Description
In this work we present the results of the spectroscopic analysis in the
near-infrared J band of a sample of 48 star forming galaxies at z =
0.84. Half of the sample was selected by a narrow-band filter tuned to
Hα at that redshift and the other half was selected by photometric
redshifts at the same redshift. We provide Hα luminosities and
star formation rates for all galaxies at that redshift. We were able to
estimate metallicities from [NII]6584 Å for a sub sample of eight
galaxies, two of the galaxies were from neckband selection. To analyze
their physical properties we have computed their sizes, colors, stellar
masses, extinctions and other parameters available in literature and in
the Rainbow database. In particular the dependence of the stellar mass
with the specific star formation rate and metallicity have been studied
and compared with the results of other samples of galaxies at several
redshifts. For a fixed mass, the metallicities of our galaxies are
compatible than those similar at the local Universe, although with
higher dispersion. This fact implies that selection in Hα is less
biased than a selection in UV, since it includes galaxies with more
evolved populations besides objects dominated by star formation. The
comparison of the observed properties with models of evolution leads us
to think that z = 0.8 star-forming galaxies have already undergone
significant changes and begin to developed in a more passive way.