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| Paper: |
Long Baseline Interferometry, a Powerful Tool to Study Stars with the B[e] Phenomenon: The Case of HD 50138* |
| Volume: |
464, Circumstellar Dynamics at High Resolution |
| Page: |
277 |
| Authors: |
Borges Fernandes, M. |
| Abstract: |
HD 50138 is one of the closest stars with the B[e] phenomenon. However, up to
now its evolutionary stage is not well known. Thanks to optical
high-resolution data from the FEROS spectrograph (ESO, La Silla), it was
possible to derive the physical parameters of this star (B6–7 III–V) and the
circum- and interstellar extinction. This object can represent a link between
Be and B[e] stars, and based on its intense spectral variations, we
tentatively suggest that a new shell phase could have taken place prior to our
observations in 2007. From the high spatial resolution provided by AMBER and
MIDI (VLTI/ESO), we have identified the presence of a gaseous and dusty
circumstellar disk. In addition, we could also derive the structure,
inclination related to line of sight, and orientation onto the sky-plane of
the circumstellar disk of HD 50138. |
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