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Date and Time of the Query: 2019-05-26 T13:59:08 PDT
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For refcode 1997AstL...23..656G:
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NED Abstract

Copyright by American Institute of Physics. 1997AstL...23..656G Calibration of the Luminosity Function of Bright Blue Stars as a Distance Indicator for Late-Type Galaxies Ts. B. Georgiev, B. I.Bilkina, and N. M. Dencheva Rozhen National Astronomical Observatory, BG-4700, Smolyan, Bulgaria Received May 5,1996; in final form, May 20,1997 Abstract-Published data for 38 galaxies are used to construct the differential luminosity functions of the brightest blue stars with (B - V)_0_ < 0.4. The magnitude V(5)_0_, for which the value of the luminosity function is equal to five stars in a 0.5^m^ interval, is calibrated as a distance indicator. The calibration of the relation between the distance modulus (m-M)_0_ and the total magnitude of the galaxy B(g)_0_ and V(5)_0_ is constructed for 15 nearby galaxies: (m-M)_0_ = 1.08 - 0.87B(g)_0_ + 1.85V(5)_0_, {sigma} = 0.39^m^. This calibration is applied to 27 other galaxies. For 18 dwarf galaxies, the distance moduli obtained by the brightest-star and luminosity- function methods are in agreement with 0.35^m^ accuracy. Dwarf galaxies with an excess (the LMC, NGC 2366, Sextans A, GR 8, DDO 187) and a deficit (Sextans B, Pegasus) of blue stars have been identified. In contrast to the brightest-star method, the luminosity-function method is less sensitive to the presence of nonstellar and chance blue objects.
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