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.

Základní údaje

Originální název

Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini

Název česky

Předběžná studie vlažné chemicky pekuliární hvězdy BS Circini

Autoři

MIKULÁŠEK, Zdeněk; Jan JANÍK ; Jiří KRTIČKA; Miloslav ZEJDA a Miroslav JAGELKA

Vydání

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

Nakladatel

Astronomical Society of the Pacific

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Obor

10308 Astronomy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

tištěná verze "print"

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/15:00080771

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-1-58381-873-2

UT WoS

000366452300023

Klíčová slova česky

BS Cir; fotometrie; CP hvězdy

Klíčová slova anglicky

BS Cir; photometry; CP stars

Štítky

AKR, rivok

Příznaky

Mezinárodní význam

Změněno: 28. 4. 2016 14:26, Ing. Andrea Mikešková

Anotace

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.

Návaznosti

GAP209/12/0217, projekt VaV

Název: Multispektrální proměnnost horkých hvězd a její příčiny

Investor: Grantová agentura ČR, Multispektrální proměnnost horkých hvězd a její příčiny

Citovat

MIKULÁŠEK, Zdeněk; Jan JANÍK; Jiří KRTIČKA; Miloslav ZEJDA a 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. 494. vyd. San Francisco: Astronomical Society of the Pacific, 2015, s. 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  - CONF
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 a 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}. 494. vyd. San Francisco: Astronomical Society of the Pacific, 2015, s.~189-196. ISBN~978-1-58381-873-2.

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