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Subdwarf B stars (sdBs) can significantly change the ultraviolet spectra ofpopulations at age t~1Gyr, and have been even included in the volutionarypopulation synthesis (EPS) models by Han et al. (2007). In this study wepresent the spectral energy distributions (SEDs) of binary stellar populations(BSPs) by combining the EPS models of Han et al. (2007) and those of the Yunnangroup (Zhang et al. 2004, 005), which have included various binary interactions(except sdBs) in EPS models. This set of SEDs is vailable upon request from theauthors.  Using this set of SEDs of BSPs we build the spectra of Burst, E, S0-Sd andIrr types of galaxies by using the package of Bruzual & Charlot (2003, BC03).Combined with the photometric data (filters and magnitudes), we obtain thephotometric redshifts and morphologies of 1502 galaxies by using the Hyperzcode of Bolzonella et al. (2000). This sample of galaxies is obtained byremoving those objects, mismatched with the SDSS/DR7 and GALEX/DR4, from thecatalogue of Fukugita et al. (2007). By comparison the results with the SDSSspectroscopic redshifts and the morphological index of Fukugita et al. (2007),we find that the photo-zs fluctuate with the SDSS spectroscopic redshifts,while the Sa-Sc galaxies in the catalogue of Fukugita et al. (2007) areclassified earlier as Burst-E galaxies.

astrophysics and space science

Inclusion of sdBs in evolutionary population synthesis for binary  stellar populations and the application: the determinations of photo-z and  galaxy morphology