PAUNZEN, Ernst. The astrophysical parameters of chemically peculiar stars from automatic methods. Astronomy and Astrophysics. EDP Sciences, 2024, vol. 683, March 2024, p. 1-4. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/202348086.
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Basic information
Original name The astrophysical parameters of chemically peculiar stars from automatic methods
Authors PAUNZEN, Ernst (40 Austria, guarantor, belonging to the institution).
Edition Astronomy and Astrophysics, EDP Sciences, 2024, 0004-6361.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher France
Confidentiality degree is not subject to a state or trade secret
WWW URL arXiv
Impact factor Impact factor: 6.500 in 2022
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1051/0004-6361/202348086
UT WoS 001184569900021
Keywords in English stars: chemically peculiar; stars: fundamental parameters; Hertzsprung-Russell and C-M diagrams
Tags rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Marie Šípková, DiS., učo 437722. Changed: 3/5/2024 12:21.
Abstract
Context. The chemically peculiar (CP) stars of the upper main sequence are excellent astrophysical laboratories for investigating the diffusion, mass loss, rotational mixing, and pulsation in the presence and absence of a stable local magnetic field. For this, we need a homogeneous set of parameters, such as effective temperature (T-eff) and surface gravity (log g), to locate the stars in the Hertzsprung-Russell diagram so that we can then estimate the mass, radius, and age. Aims. In recent years, the results of several automatic pipelines have been published; these use various techniques and data sets, including T-eff and log g values for millions of stars. Because CP stars are known to have flux anomalies, these astrophysical parameters must be tested for their reliability and usefulness. If the outcome is positive, these can be used to analyse the new and faint CP stars published recently. Methods. I compared published T-eff and log g values of a set of CP stars, which are mostly based on high-resolution spectroscopy, with values from four automatic pipeline approaches. In doing so, I searched for possible correlations and offsets. Results. I present a detailed statistical analysis of a comparison between the 'standard' and published T-eff and log g values. The accuracy depends on the presence of a magnetic field and the spectral type of the CP subgroups. However, I obtain standard deviations of between 2% and 20%. Conclusions. Considering the statistical errors, the astrophysical parameters from the literature can be used for CP stars, although caution is advised for magnetic CP stars.
Links
GA23-07605S, research and development projectName: Osud galaktických otevřených hvězdokup
Investor: Czech Science Foundation, The fate of Galactic open clusters
PrintDisplayed: 17/7/2024 09:30