Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bsrsl..80..371g&link_type=abstract
Société Royale des Sciences de Liège, Bulletin, vol. 80, p. 371-375 (Proceedings of the 39th Liège Astrophysical Colloquium, hel
Astronomy and Astrophysics
Astrophysics
Scientific paper
The classical Be star NW Serpentis (HD 168797) is part of the CoRoT field and has long been studied photometrically and is known to have multi-periodic pulsational modes. Such pulsations are thought to be a way to generate the Be equatorial circumstellar disk. In an earlier survey, we identified this star as a possible non-radial pulsator and a known B←Be variable. During Fall 2008, we obtained 23 spectra over 35 nights in the Hα region. During this time, we observed Hα to go from purely photospheric absorption to double-peaked emission then "fade" back toward photospheric absorption. We present our determination of stellar parameters, our analysis of the circumstellar disk construction, and the possibility of a binary companion. These observations also suggest that frequent observations of Be stars known to be non-radial pulsators may yield more opportunities to study the disk-building phenomenon and thus assist in constraining theoretical models of disk generation.
Aragona Christina
Boyajian Tabetha S.
Grundstrom Erika D.
Marsh Amber N.
McSwain Virgina M.
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