53 citations · 76 across the 3 of their papers we have counts for
5 papers
The masses of hot subdwarfs
X. Zhang, X. Chen, Z. Han
Masses are a fundamental parameter, but they are not well known for most hot subdwarfs. In general, the mass of a hot subdwarf is derived with asteroseismology or dynamical methods…
Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors
Z. H. Zhang, R. S. Pokorny, H. R. A. Jones +6
Aims. We try to identify ultra-cool dwarfs from the seventh Data Release of the Sloan Digital Sky Survey (SDSS DR7) with SDSS i-z and r-z colors. We also obtain proper motion data…
The single degenerate channel for the progenitor of type Ia supernovae
Xiangcun Meng, Xuefei Chen, Zhanwen Han
We have carried out a detailed study of the single-degenerate channel for the progenitors of type Ia supernovae (SNe Ia). In the model, a carbon-oxygen white dwarf (CO WD) accretes…
Hot subdwarfs from the ESO Supernova Ia Progenitor Survey - I. Atmospheric parameters and cool companions of sdB stars
T. Lisker, U. Heber, R. Napiwotzki +4
We present the analysis of a high-resolution, high-quality sample of optical spectra for 76 subdwarf B (sdB) stars from the ESO Supernova Ia Progenitor Survey (SPY). Effective temp…
The single degenerate channel for the progenitors of type Ia supernovae
Zhanwen Han, Philipp Podsiadlowski
We have carried out a detailed study of one of the most popular evolutionary channels for the production of Type Ia supernova (SN Ia) progenitors, the semi-degenerate channel (CO+M…