A Method for Quantitative Detection of Hot Horizontal Branches in Early-Type Galaxies

Abstract

view Abstract Citations (21) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Method for Quantitative Detection of Hot Horizontal Branches in Early-Type Galaxies Worthey, Guy Abstract Surface brightness fluctuation magnitudes in the 2800-4000 A region are calculated. They show that a hot main sequence can be easily distinguished from a hot horizontal branch due to the relative sensitivity of fluctuation magnitudes to the presence of giants. Superluminous post-asymptotic giant branch (PAGB) stars will need to be subtracted before applying this method, and other hypothesized late- stage, hot stars may also contribute to the surface brightness fluctuation magnitudes, complicating the analysis. Application of this method further in the UV will provide an estimate of the luminosity of the next most luminous subpopulation of stars after the PAGB stars, which will constrain the possible populations responsible for the UV flux in ellipticals. Publication: The Astrophysical Journal Pub Date: October 1993 DOI: 10.1086/187040 Bibcode: 1993ApJ...415L..91W Keywords: GALAXIES: ELLIPTICAL AND LENTICULAR; CD; GALAXIES: STELLAR CONTENT; STARS: HORIZONTAL-BRANCH; STARS: EVOLUTION full text sources ADS | data products SIMBAD (1) MAST (1)