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Fundamental Parameters of Be Stars Derived from Near-Infrared Spectra

Published online by Cambridge University Press:  12 April 2016

L. Houziaux
Affiliation:
Université de Mons-Hainaut, B7000 Mons (Belgium)
Y. Frémat
Affiliation:
Université de Mons-Hainaut, B7000 Mons (Belgium)

Abstract

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Because of their spectral peculiarities, stellar parameters of objects undergoing the Be phenomenon cannot be determined in the same way as for normal B stars. In particular, the use of the first lines of the Hydrogen series is hampered by the presence of emission components. On the other end, the recently generalized use of CCD detectors, well adapted to the deep red spectral region, provides a large amount of quantitative and well calibrated flux measurements with spectral resolutions around 0.1 nm. We propose to use the shape of the continuum and line flux distribution in the range of the higher Paschen lines of Hydrogen to determine first the effective temperature and superficial gravity of Be stars where, in most cases, the photospheric spectrum is not disturbed by line or continuum emission.

Type
6. Disks
Copyright
Copyright © Astronomical Society of the Pacific 2000

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