Detailed Information on Publication Record
2018
The Kepler view of magnetic chemically peculiar stars
HÜMMERICH, Stefan, Zdeněk MIKULÁŠEK, Ernst PAUNZEN, Klaus BERNHARD, Jan JANÍK et. al.Basic information
Original name
The Kepler view of magnetic chemically peculiar stars
Authors
HÜMMERICH, Stefan (276 Germany), Zdeněk MIKULÁŠEK (203 Czech Republic, guarantor, belonging to the institution), Ernst PAUNZEN (40 Austria, belonging to the institution), Klaus BERNHARD (276 Germany), Jan JANÍK (203 Czech Republic, belonging to the institution), Iliya YAKUNIN (643 Russian Federation), Theodor PRIBULLA (703 Slovakia), Martin VAŇKO (703 Slovakia) and Lenka MATĚCHOVÁ (203 Czech Republic, belonging to the institution)
Edition
ASTRONOMY & ASTROPHYSICS, LES ULIS CEDEX A, EDP SCIENCES S A, 2018, 1432-0746
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: 6.209
RIV identification code
RIV/00216224:14310/18:00101367
Organization unit
Faculty of Science
UT WoS
000449726800001
Keywords in English
stars: chemically peculiar; stars: abundances; stars: atmospheres; stars: rotation; stars: variables: general
Tags
Tags
International impact, Reviewed
Změněno: 30/4/2019 09:22, Mgr. Tereza Miškechová
Abstract
V originále
Context. Magnetic chemically peculiar (mCP) stars exhibit complex atmospheres that allow the investigation of such diverse phenomena as atomic diffusion, magnetic fields, and stellar rotation. The advent of space-based photometry provides the opportunity for the first precise characterizations of the photometric variability properties of these stars, which might advance our understanding of the processes involved and the atmospheric structures of mCP stars. Aims. We carried out a search for new mCP stars in the Kepler field with the ultimate aim of investigating their photometric variability properties using Kepler data. As an aside, we describe criteria for selecting mCP star candidates based on light curve properties, and assess the accuracy of the spectral classifications provided by the MKCLASS code. Methods. As only very few known mCP stars are situated in the Kepler field, we had to depend largely on alternative (nonspectroscopic) means of identifying suitable candidates that rely mostly on light curve properties; in particular we relied on monoperiodic variability and light curve stability. Newly acquired and archival spectra were used to confirm most of our mCP star candidates. Linear ephemeris parameters and effective amplitudes were derived from detrended Kepler data. Results. Our final sample consists of 41 spectroscopically confirmed mCP stars of which 39 are new discoveries, 5 candidate mCP stars, and 7 stars in which no chemical peculiarities could be established. Our targets populate the whole age range from zero-age main sequence to terminal-age main sequence and are distributed in the mass interval from 1.5 M-circle dot to 4 M-circle dot. About 25% of the mCP stars show a hitherto unobserved wealth of detail in their light curves indicative of complex surface structures. We identified light curve stability as a primary criterion for identifying mCP star candidates among early-type stars in large photometric surveys, and prove the reliability of the spectral classifications provided by the MKCLASS code.
Links
| GA16-01116S, research and development project |
|