Effective temperatures and angular diameters of Bp-Ap SI stars and B and A normal stars - (u-b) and Delta(m2100)0 calibrations

Details Effective temperatures and angular diameters of Bp-Ap SI stars and B and A normal stars - (u-b) and Delta(m2100)0 calibrations Effective temperatures and angular diameters of Bp-Ap SI stars and B and A normal stars - (u-b) and Delta(m2100)0 calibrations

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...72..551m&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 72, no. 3, March 1988, p. 551-562.

Astronomy and Astrophysics

Astrophysics

44

A Stars, Peculiar Stars, Stellar Atmospheres, Stellar Magnitude, Stellar Temperature, Calibrating, Diameters, Infrared Photometry

Scientific paper

Empirical effective temperatures and angular diameters are determined for nine standard stars and twelve Bp-Si stars by the Blackwell el al. (1980) method from total integral fluxes. Three calibrations (Johnson, Hayes, Wamsteker) for J, H, K, L, M photometry are discussed. The Teff calibrations are given as functions of the two colour indices [u-b] and (Δm2100)0. The calibrations for Bp-Ap stars differ from these for standard stars. A linear correlation is found between the indices [u-b] and (Δm2100)0, both for standard and peculiar stars. The author confirms the smaller Balmer Jump of peculiar stars as compared to that of normal stars with same Teff. The available observations also confirm the decrease of Balmer Jump with increasing silicon abundance.

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