Detailed Information on Publication Record
2024
The astrophysical parameters of chemically peculiar stars from automatic methods
PAUNZEN, ErnstBasic 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
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
France
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 6.500 in 2022
Organization unit
Faculty of Science
UT WoS
001184569900021
Keywords in English
stars: chemically peculiar; stars: fundamental parameters; Hertzsprung-Russell and C-M diagrams
Tags
Tags
International impact, Reviewed
Změněno: 3/5/2024 12:21, Mgr. Marie Šípková, DiS.
Abstract
V originále
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 project |
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