Hot Subdwarf Stars Identified in Gaia DR2 with Spectra of LAMOST DR6 and DR7. II. Kinematics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00534444" target="_blank" >RIV/67985815:_____/20:00534444 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-4357/ab98f3" target="_blank" >https://doi.org/10.3847/1538-4357/ab98f3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ab98f3" target="_blank" >10.3847/1538-4357/ab98f3</a>
Alternative languages
Result language
angličtina
Original language name
Hot Subdwarf Stars Identified in Gaia DR2 with Spectra of LAMOST DR6 and DR7. II. Kinematics
Original language description
We present a kinematic population classification of the four hot subdwarf helium groups based on their positions in the U - V velocity diagram, the J(Z)- eccentricity diagram, and their Galactic orbits. The overall tendency of the fractional distributions of the four hot subdwarf helium groups in the halo, thin disk, and thick disk is largely consistent with the findings reported by Luo et al. based on LAMOST DR5, which appears to support predictions of binary population synthesis. He-deficient stars with -2.2 <= log(y) < -1 likely originate from a stable Roche lobe overflow channel, He-deficient stars with log(y) < -2.2 from the common envelope ejection channel, and He-rich stars with log(y) >= 0 from the merger channel of double He white dwarf stars. The fraction of He-rich hot subdwarf stars with -1 <= log (y) < 0 in the thin disk and the halo is far higher than that in the thick disk, which implies that these stars have different formation channels in the thin disk and in the halo.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
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
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
1538-4357
e-ISSN
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Volume of the periodical
898
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
64
UT code for WoS article
000555732800001
EID of the result in the Scopus database
2-s2.0-85088981737