Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00518288" target="_blank" >RIV/67985815:_____/19:00518288 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-4357/ab298d" target="_blank" >https://doi.org/10.3847/1538-4357/ab298d</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ab298d" target="_blank" >10.3847/1538-4357/ab298d</a>

Result language
angličtina
Original language name
Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5
Original language description
Combing Gaia DR2 with LAMOST DR5, we spectroscopically identified 924 hot subdwarf stars, among which 32 stars exhibit strong double-lined composite spectra. We measured the effective temperature T-eff, surface gravity logg, helium abundance y = nHe/nH, and radial velocities of 892 non-composite spectra hot subdwarf stars by fitting LAMOST observations with Tlusty/Synspec non-LTE synthetic spectra. We outlined four different groups in the T-eff-logg diagram with our helium abundance classification scheme and two nearly parallel sequences in the T-eff-log(y) diagram.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA18-20083S" target="_blank" >GA18-20083S: Gaia-GALEX survey of hot subdwarf stars</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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