Time-dependent spectral-feature variations of stars displaying the B[e] phenomenon III. HD 50138

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10332007" target="_blank" >RIV/00216208:11320/16:10332007 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/16:00461424

Result on the web

<a href="http://dx.doi.org/10.1051/0004-6361/201526290" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201526290</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201526290" target="_blank" >10.1051/0004-6361/201526290</a>

Result language

angličtina

Original language name

Time-dependent spectral-feature variations of stars displaying the B[e] phenomenon III. HD 50138

Original language description

Context. B[e] stars are anomalous objects around which extended circumstellar matter is present. The observed properties of the central star are significantly affected by the surrounding material. Therefore, the use of standard synthetic spectra is disputable in this case and our capability to study these objects is limited. One of the possibilities is to analyse variations of the spectral features. Long-term spectroscopic observations are required for this, but are not found in the literature. For our study we choose the B[e] star HD 50138 of the FS CMa type because of the indication that this star is a post-main-sequence star, although still not highly evolved. Therefore, it can be a good object for testing evolutionary models. Currently, HD 50138 is the most extensively observed FS CMa star which makes it an ideal object for modelling.Nacional San Pedro Martir (echelle, R similar to 18 000, 16 spectra, 2005-2013), and the 0.81 m telescope at Three College Observatory (echelle, R similar to 12 000, 26 spectra, 2013-2014). Methods. We describe and analyse variations of the chosen lines. The measurements of the equivalent widths and radial velocities of the H alpha, H beta, and [O I] lambda lambda 6300, 6364 angstrom lines are presented. The set of obtained spectra allows us to describe the changes on timescales from days to years.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GAP209%2F10%2F0715" target="_blank" >GAP209/10/0715: Accurate physical properties of hot stars based on binary and multiple star studies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy and Astrophysics [online]

ISSN

1432-0746

e-ISSN

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Volume of the periodical

586

Issue of the periodical within the volume

únor

Country of publishing house

PL - POLAND

Number of pages

29

Pages from-to

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UT code for WoS article

000369715900127

EID of the result in the Scopus database

2-s2.0-84957605059