Time-resolved spectroscopy of the peculiar H alpha variable Be star HD 76534

R.D. Oudmaijer, J.E. Drew

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    Abstract

    We present time-resolved spectroscopy of the Be star HD 76534, which was observed to have an Ha outburst in 1995, when the line went from photospheric absorption to emission at a level of more than two times the continuum within 2.5 hours. To investigate the short-term behaviour of the spectrum of HD 76534 we have obtained 30 spectra within two hours real-time and searched for variations in the spectrum.Within the levels of statistical significance, no variabilitywas found. Rather than periodic on short time scales, the H behaviour seems to be commonly episodic on longer (> 1 year) time scales, as an assessment of the existing data on theH line and the Hipparcos photometry suggests. HD 76534 underwent only 1 photometric outburst in the 3 year span that the star was monitored by the Hipparcos satellite.
    Original languageEnglish
    Pages (from-to)485-490
    JournalAstronomy and Astrophysics
    Volume350
    Publication statusPublished - 1999

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