The luminosity of the Halpha_-emission envelopes of variable Is(A)-type stars.

Details The luminosity of the Halpha_-emission envelopes of variable Is(A)-type stars. The luminosity of the Halpha_-emission envelopes of variable Is(A)-type stars.

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...325.1083p&link_type=abstract

Astronomy and Astrophysics, v.325, p.1083-1087

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2

Stars: Early Type, Stars: Emission Line, Stars: Variables: Other, Stars: Pre Main-Sequence

Scientific paper

We present the results of the analysis of the emission spectra of variable Is(A)-type stars. Sixteen stars have been observed in 1988-1992 at the 6-m telescope of Special Astrophysical Observaroty, Russian Academy of Sciences (SAO RAS) with the middle-resolution (R=~3000) echelle spectrograph ``Zebra". Equivalent widths of the Halpha_ and Hbeta_ (if available) emission components were obtained, the underlying profile of the corresponding absorption lines were taken into account. The luminosities of the emission envelopes in the Halpha_ and Hbeta_ lines were then calculated. The main result of the investigation is that the luminosity of the emission envelope appears to depend on the effective temperature of the star.

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