2025A&A...696A..85C

Query : 2025A&A...696A..85C

2025A&A...696A..85C - Astronomy and Astrophysics, volume 696A85 (2025/4-1)

The OTELO survey New evidence of downsizing from the specific star formation rates, stellar mass functions, and star formation histories of a sample of low-mass galaxies at 0.38 < z < 1.43.

CEDRES B., BONGIOVANNI A., CEPA J., PADILLA-TORRES C.P., NADOLNY J., LARA-LOPEZ M.A., GONZALEZ-SERRANO J.I., ALFARO E.J., CERVINO M., GALLEGO J., GONZALEZ-OTERO M., SANCHEZ-PORTAL M., DE DIEGO J.A., PEREZ-MARTINEZ R., PEREZ-GARCIA A.M. and POVIC M.

Abstract (from CDS):

Aims. We present an analysis of the emitters (Hα, Hβ, and [O II]) from the OTELO survey, in order to characterize the star formation properties of low-mass galaxies (< 109 M⊙ stellar masses).
Methods. We calculated the specific star formation rate function, the stellar mass function, and, by integrating them, the associated densities for both quantities: the specific star formation rate density and the stellar mass density. We obtained the star formation history of our low-mass sample galaxies by fitting the spectral energy distribution of the galaxies. We also compared our results with those from the literature at different mass regimes and redshifts.
Results. The specific star formation rate density and the stellar mass density for low-mass galaxies do not depend on the redshift, contrary to the behaviour presented by the high-mass galaxies. We found that the star formation histories of low-mass galaxies are characterized by a constant star formation rate, in contrast to high-mass galaxies. We interpret these results, in the context of the downsizing effect, as representative of the faster evolution of massive galaxies compared with low-mass ones.

Abstract Copyright: © The Authors 2025

Journal keyword(s): surveys - galaxies: luminosity function - mass function - galaxies: starburst - galaxies: star formation - cosmology: observations

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Extended Groth Strip reg 14 19 +52.8           ~ 1023 0

Query : 2025A&A...696A..85C

Basic data :
NAME Extended Groth Strip -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		14 19 00.0 +52 48 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		14 17 16.3 +53 01 45 [ ]
Gal coord. (ep=J2000) : 		096.4814 +59.5977 [ ]
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Identifiers (2) :
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NAME EGS NAME Extended Groth Strip

References (1023 between 1850 and 2026) (Total 1023)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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