Título: | Star formation in the local Universe from the CALIFA sample. I. Calibrating the SFR using IFS data |
Autores: | Catalán Torrecilla, Cristina ; Gil de Paz, Armando ; Castillo Morales, África ; Pérez González, Pablo Guillermo ; Marino, Raffaella Anna ; otros, ... |
Tipo de documento: | texto impreso |
Editorial: | EDP Sciencies, 2015-12 |
Dimensiones: | application/pdf |
Nota general: | info:eu-repo/semantics/openAccess |
Idiomas: | |
Palabras clave: | Estado = Publicado , Materia = Ciencias: Física: Astrofísica , Materia = Ciencias: Física: Astronomía , Tipo = Artículo |
Resumen: |
Context. The star formation rate (SFR) is one of the main parameters used to analyze the evolution of galaxies through time. The need for recovering the light reprocessed by dust commonly requires the use of low spatial resolution far-infrared data. Recombination line luminosities provide an alternative, although uncertain dust-extinction corrections based on narrowband imaging or long-slit spectroscopy have traditionally posed a limit to their applicability. Integral field spectroscopy (IFS) is clearly the way to overcome this kind of limitation. Aims. We obtain integrated H?, ultraviolet (UV) and infrared (IR)-based SFR measurements for 272 galaxies from the CALIFA survey at 0.005 Results. We find that the extinction-corrected H? luminosity agrees with the hybrid updated SFR estimators based on either UV or H? plus IR luminosity over the full range of SFRs (0.03?20 M_??yr^-1). The coefficient that weights the amount of energy produced by newly-born stars that is reprocessed by dust on the hybrid tracers, a_IR, shows a large dispersion. However, this coefficient does not became increasingly small at high attenuations, as expected if significant highly-obscured H? emission were missed, i.e., after a Balmer decrement-based attenuation correction is applied. Lenticulars, early-type spirals, and type-2 AGN host galaxies show smaller coefficients because of the contribution of optical photons and AGN to dust heating. Conclusions. In the local Universe, the H? luminosity derived from IFS observations can be used to measure SFR, at least in statistically-significant, optically-selected galaxy samples, once stellar continuum absorption and dust attenuation effects are accounted for. The analysis of the SFR calibrations by galaxies properties could potentially be used by other works to study the impact of different selection criteria in the SFR values derived, and to disentangle selection effects from other physically motivated differences, such as environmental or evolutionary effects. |
En línea: | https://eprints.ucm.es/35753/1/castillo22preprint.pdf |
Ejemplares
Estado |
---|
ningún ejemplar |