Number of the records: 1
Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5
- 1.0518288 - ASÚ 2020 RIV US eng J - Journal Article
Luo, Y. - Németh, Péter - Deng, L. - Han, Z.
Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5.
Astrophysical Journal. Roč. 881, č. 1 (2019), č. článku 7. ISSN 0004-637X. E-ISSN 1538-4357
R&D Projects: GA ČR(CZ) GA18-20083S
Institutional support: RVO:67985815
Keywords : kinematics and dynamics * subdwarfs * surveys
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.746, year: 2019
Method of publishing: Limited access
https://doi.org/10.3847/1538-4357/ab298d
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.
Permanent Link: http://hdl.handle.net/11104/0303445
Number of the records: 1