Preliminary Study of the Moderately Cool Chemically Peculiar
Star BS Circini

D 2015

Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini

MIKULÁŠEK, Zdeněk, Jan JANÍK, Jiří KRTIČKA, Miloslav ZEJDA, Miroslav JAGELKA et. al.

Basic information

Original name

Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini

Name in Czech

Předběžná studie vlažné chemicky pekuliární hvězdy BS Circini

Authors

MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor, belonging to the institution), Jan JANÍK (203 Czech Republic, belonging to the institution), Jiří KRTIČKA (203 Czech Republic, belonging to the institution), Miloslav ZEJDA (203 Czech Republic, belonging to the institution) and Miroslav JAGELKA (703 Slovakia, belonging to the institution)

Edition

494. vyd. San Francisco, Physics and Evolution of Magnetic and Related Stars, p. 189-196, 8 pp. 2015

Publisher

Astronomical Society of the Pacific

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

printed version "print"

RIV identification code

RIV/00216224:14310/15:00080771

Organization unit

Faculty of Science

ISBN

978-1-58381-873-2

UT WoS

000366452300023

Keywords (in Czech)

BS Cir; fotometrie; CP hvězdy

Keywords in English

BS Cir; photometry; CP stars

Abstract

V originále

BS Cir is a representative of moderately cool magnetic chemically peculiar stars, which shows very strong light variations in the Strömgren index c1, indicating large changes in the height of the Balmer jump. We present a two-spot model of the light variations, fitting successfully all the nine light curves obtained in the spectral region 335-750 nm. We also discuss the nature of the observed variations of the intensities of Fe, Cr, Ti, Si, Mg, and RE spectral lines and possible mechanisms matching the observed light variations. It was confirmed that the observed period of BS Cir 2.204d is rising with a rate of dP/dt = 5.4(4)×10-9. The found minor secular changes in the shape of the light curve should be compatible with the period changes caused by precessional motion due to magnetic distortion of the star.

Links

GAP209/12/0217, research and development project

Name: Multispektrální proměnnost horkých hvězd a její příčiny

Investor: Czech Science Foundation

Citovat

MIKULÁŠEK, Zdeněk, Jan JANÍK, Jiří KRTIČKA, Miloslav ZEJDA and Miroslav JAGELKA. Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini. In Kudryavtsev, D. O.; Balega, Yu. Yu.; Romanyuk, I. I. Physics and Evolution of Magnetic and Related Stars. 494th ed. San Francisco: Astronomical Society of the Pacific, 2015, p. 189-196. ISBN 978-1-58381-873-2.

@inproceedings{1298622,
   author = {Mikulášek, Zdeněk and Janík, Jan and Krtička, Jiří and Zejda, Miloslav and Jagelka, Miroslav},
   address = {San Francisco},
   booktitle = {Physics and Evolution of Magnetic and Related Stars},
   edition = {494},
   editor = {Kudryavtsev, D. O.; Balega, Yu. Yu.; Romanyuk, I. I.},
   keywords = {BS Cir; photometry; CP stars},
   howpublished = {tištěná verze "print"},
   language = {eng},
   location = {San Francisco},
   isbn = {978-1-58381-873-2},
   pages = {189-196},
   publisher = {Astronomical Society of the Pacific},
   title = {Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini},
   year = {2015}
}

TY  - JOUR
ID  - 1298622
AU  - Mikulášek, Zdeněk - Janík, Jan - Krtička, Jiří - Zejda, Miloslav - Jagelka, Miroslav
PY  - 2015
TI  - Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini
PB  - Astronomical Society of the Pacific
CY  - San Francisco
SN  - 9781583818732
KW  - BS Cir
KW  - photometry
KW  - CP stars
N2  - BS Cir is a representative of moderately cool magnetic chemically peculiar stars, which shows very strong light variations in the Strömgren index c1, indicating large changes in the height of the Balmer jump. We present a two-spot model of the light variations, fitting successfully all the nine light curves obtained in the spectral region 335-750 nm. We also discuss the nature of the observed variations of the intensities of Fe, Cr, Ti, Si, Mg, and RE spectral lines and possible mechanisms matching the observed light variations. It was confirmed that the observed period of BS Cir 2.204d is rising with a rate of dP/dt = 5.4(4)×10-9. The found minor secular changes in the shape of the light curve should be compatible with the period changes caused by precessional motion due to magnetic distortion of the star.
ER  -

MIKULÁŠEK, Zdeněk, Jan JANÍK, Jiří KRTIČKA, Miloslav ZEJDA and Miroslav JAGELKA. Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini. In Kudryavtsev, D. O.; Balega, Yu. Yu.; Romanyuk, I. I. \textit{Physics and Evolution of Magnetic and Related Stars}. 494th ed. San Francisco: Astronomical Society of the Pacific, 2015, p.~189-196. ISBN~978-1-58381-873-2.

Detailed Information on Publication Record