2018
A Binary Nature of the Marginal CP Star Sigma Sculptoris
JANÍK, Jan; Jiří KRTIČKA; Zdeněk MIKULÁŠEK; Juraj ZVERKO; Olga PINTADO et. al.Základní údaje
Originální název
A Binary Nature of the Marginal CP Star Sigma Sculptoris
Název česky
A Binary Nature of the Marginal CP Star Sigma Sculptoris
Autoři
JANÍK, Jan (203 Česká republika, garant, domácí); Jiří KRTIČKA (203 Česká republika, domácí); Zdeněk MIKULÁŠEK (203 Česká republika, domácí); Juraj ZVERKO (703 Slovensko); Olga PINTADO (32 Argentina); Ernst PAUNZEN (40 Rakousko, domácí); Milan PRVÁK (203 Česká republika, domácí); Jan SKALICKÝ (203 Česká republika, domácí); Miloslav ZEJDA (203 Česká republika, domácí) a Christian ADAM (276 Německo)
Vydání
Publications of the Astronomical Society of the Pacific, 2018, 0004-6280
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10308 Astronomy
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 3.470
Kód RIV
RIV/00216224:14310/18:00100880
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000429006800001
EID Scopus
2-s2.0-85045153533
Klíčová slova česky
stars: chemically peculiar; stars: early-type; stars: binaries: spectroscopic; stars: variables: general; stars: individual (sigma Scl)
Klíčová slova anglicky
stars: chemically peculiar; stars: early-type; stars: binaries: spectroscopic; stars: variables: general; stars: individual (sigma Scl)
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 23. 4. 2024 11:13, Mgr. Michal Petr
V originále
The A2 V star sigma Scl was suspected of being a low-amplitude rotating variable of the Ap-type star by several authors. Aiming to decide whether the star is a variable chemically peculiar (CP) star, we searched for the photometric and spectroscopic variability, and determined chemical abundances of sigma Scl. The possible variability was tested using several types of periodograms applied to the photometry from Long-Term Photometry of Variables project (LTPV) and Hipparcos. Sixty spectrograms of high signal-to-noise (S/N) were obtained and used for chemical analysis of the stellar atmosphere and for looking for spectral variability that is symptomatic for the CP stars. We did not find any signs of the light variability or prominent chemical peculiarity, that is specific for the CP stars. The only exception is the abundance of scandium, which is significantly lower than the solar one and yttrium and barium, which are strongly overabundant. As a by-product of the analysis, and with the addition of 29 further spectra, we found that sigma Scl is a single-lined spectroscopic binary with orbital period of 46.877(8) d. We argue that sigma Scl is not an Ap star, but rather a marginal Am star in SB1 system. The spectral energy distribution of the binary reveals infrared excess due to circumstellar material.
Česky
The A2 V star sigma Scl was suspected of being a low-amplitude rotating variable of the Ap-type star by several authors. Aiming to decide whether the star is a variable chemically peculiar (CP) star, we searched for the photometric and spectroscopic variability, and determined chemical abundances of sigma Scl. The possible variability was tested using several types of periodograms applied to the photometry from Long-Term Photometry of Variables project (LTPV) and Hipparcos. Sixty spectrograms of high signal-to-noise (S/N) were obtained and used for chemical analysis of the stellar atmosphere and for looking for spectral variability that is symptomatic for the CP stars. We did not find any signs of the light variability or prominent chemical peculiarity, that is specific for the CP stars. The only exception is the abundance of scandium, which is significantly lower than the solar one and yttrium and barium, which are strongly overabundant. As a by-product of the analysis, and with the addition of 29 further spectra, we found that sigma Scl is a single-lined spectroscopic binary with orbital period of 46.877(8) d. We argue that sigma Scl is not an Ap star, but rather a marginal Am star in SB1 system. The spectral energy distribution of the binary reveals infrared excess due to circumstellar material.
Návaznosti
| GA16-01116S, projekt VaV |
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| 7AMB14AT015, projekt VaV |
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| 7AMB17AT030, projekt VaV |
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