UV-upturn of elliptical galaxies model (Han+, 2007)

Details UV-upturn of elliptical galaxies model (Han+, 2007) UV-upturn of elliptical galaxies model (Han+, 2007)

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ycat..83801098h&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/380/1098. Originally published in: 2007MNRAS.380.1098H

Computer Science

Models: Evolutionary, Galaxies: Photometry, Ultraviolet

Scientific paper

A long-standing problem in the study of elliptical galaxies is the far-ultraviolet (FUV) excess in their spectra (also known as UV-upturn, UV rising-branch, UV rising flux, or UVX). While it is now clear that this UV excess is caused by an old population of hot helium-burning stars without large hydrogen-rich envelopes. We have developed an evolutionary population synthesis (EPS) model for the FUV excess of elliptical galaxies based on the binary model of Han et al. (2002MNRAS.336..449H and 2003MNRAS.341..669H) for the formation of hot subdwarfs in our Galaxy. We give the colour evolution of a simple stellar population (SSP) (including binaries) of 1010M{sun} for our standard simulation set. We have also compiled a file for the SED evolution, in which the SEDs without binary interactions are also supplied.
(4 data files).

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