Time-Dependent Spectral Feature Variations of the FS CMa Star HD 50138

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00478709" target="_blank" >RIV/67985815:_____/17:00478709 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/17:00096530 RIV/00216208:11320/17:10368999
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Time-Dependent Spectral Feature Variations of the FS CMa Star HD 50138
Original language description
HD 50138 (V743 Mon, MWC 158, or IRAS 06491-0654) is a B[e] star of the FS CMa type. It is supposed to be a post-main-sequence star, which is still not highly evolved. The presence of a gaseous and dusty envelope precludes direct observations of the central object, and the possible binarity and physical nature of HD 50138 remains unclear. We present a long-term spectroscopic monitoring of this object over the last 20 years (Jefabkova et al. 2016). Based on the obtained data, we confirm a quasi-periodic behavior of the object's spectral variability with two newly found long periods manifested in the Ha and forbidden [0 t] lines. The rotating structures around the object are supported by the detection of moving humps in the Ha profile. Our results are consistent with either mass transfer in a binary system or the presence of an outflowing disk. Since our data cannot confirm the presence of a binary companion, the origin of such systems remains an interesting problem for further investigation.
Czech name
—
Czech description
—

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)