Poet

Feinstein, Elaine

doi:10.2307/25008489

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although approximately 50 % of the Be stars display irregular variations in brightness (Feinstein 1968), only a few show variability above 0.06 mag. We also reject double Be stars and Be in multiple systems.…”

Section: Intrinsic Colour Indices Of Be Stars -The Observational Matementioning

confidence: 99%

“…Among many Be stars we observe infrared (Schild 1976;Goraya 1986) and ultraviolet excess emission (Barbier & Chalonge 1941). About 50 % of the Be stars show photometric variations (Feinstein 1968(Feinstein , 1975. The presence of an excess of infrared emission in the spectra of Be stars has generally been interpreted as due to free-free radiation from this ionized region (Johnson 1967;Waters et al 1988).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Intrinsic colour indices of Be stars obtained from 2MASS photometry

Wegner¹

2015

Astron Nachr

View full text Add to dashboard Cite

This paper is based on 2MASS photometry (JHKs magnitudes) of 1172 Be stars. The observed mean intrinsic colours have been derived with aid of two-colour diagrams for Be stars of luminosity classes Ie-IIe, IIIe and IVe-Ve. The obtained results are the first determinations of their intrinsic colours in the astronomical literature. The smoothed infrared colours are compared with those obtained for "normal" B stars. Several two-colour diagrams and plots of observed and smoothed intrinsic colour versus spectral type of luminosity classes Ie-IIe, IIIe and IVe-Ve are presented. Generally the determined infrared intrinsic colours of Be stars (V − J)0, (V − H)0, and (V − Ks)o differ substantially from those of "normal" B stars. It is found that the intrinsic colours of B stars are generally bluer than Be stars of corresponding spectral type and luminosity class. The mean absolute visual magnitude Mv of 528 Be stars for luminosity classes Iae, Ibe-Iabe, IIe, IIIe and IVe-Ve is derived from HIPPARCOS parallaxes. The Mv calibration is compared with the existing ones. The Be stars are generally brighter than "normal" B stars of corresponding spectral types.

show abstract

Section: Intrinsic Colour Indices Of Be Stars -The Observational Matementioning

confidence: 99%