HD 143 418 - an Interacting Binary with a Sub-Synchronously Rotating Primary

MIKULÁŠEK, Zdeněk, Juraj ZVERKO, Jozef ŽIŽNOVSKÝ, Jiří KRTIČKA, Ilian Kh. ILIEV, Dmitrij O. KUDRYAVTSEV, Tomáš GRÁF and Miloslav ZEJDA. HD 143 418 - an Interacting Binary with a Sub-Synchronously Rotating Primary. In A. Prša, M. Zejda. ASP Conference Series 435 - Binaries - Key to Comprehension to the Universe. San Francisco, USA: Astronomical Society of the Pacific, 2010, p. 319-322. ISBN 978-1-58381-750-6.

Basic information

Original name

HD 143 418 - an Interacting Binary with a Sub-Synchronously Rotating Primary

Name in Czech

HD 143 418 - interaktivní dvojhvězda se subsynchronně rotující primární složkou

Authors

MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor, belonging to the institution), Juraj ZVERKO (703 Slovakia), Jozef ŽIŽNOVSKÝ (703 Slovakia), Jiří KRTIČKA (203 Czech Republic, belonging to the institution), Ilian Kh. ILIEV (100 Bulgaria), Dmitrij O. KUDRYAVTSEV (643 Russian Federation), Tomáš GRÁF (203 Czech Republic) and Miloslav ZEJDA (203 Czech Republic, belonging to the institution)

Edition

San Francisco, USA, ASP Conference Series 435 - Binaries - Key to Comprehension to the Universe, p. 319-322, 4 pp. 2010

Publisher

Astronomical Society of the Pacific

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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/00216224:14310/10:00049409

Organization unit

Faculty of Science

ISBN

978-1-58381-750-6

UT WoS

000289880000074

Keywords (in Czech)

interagující dvojhvězda; analýza hlavních komponent; chemicky pekuliární hvězdy

Keywords in English

interacting binary; principal component analysis; chemical peculiar stars

Tags

AKb, rivok

Tags

International impact

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Abstract

V originále

HD143418 is a non-eclipsing double-lined close binary with orbital period Porb = 2.282520 d. The photometrically and spectroscopically dominant primary component is a normal A5V star in the middle of its stay on the main sequence with extremely slow, subsynchronous rotation (P_rot being about 14 days!). Its photometric monitoring since 1982 revealed orbitally modulated variations with changing form and amplitude. The advanced principal component analysis (APCA) disentangling extracted a steady part of light curves obviously caused by the ellipticity of the primary. Seasonal components of the light curves may be related to an expected incidence of circumstellar matter ejected from the tidally spinning up primary component. A possible scenario of the synchronisation process is also briefly discussed.

In Czech

HD143418 je nezákrytová těsná dvojhvězda SB2 s orbitální periodou Porb = 2.282520 d. Fotometricky a spektroskopicky dominantní primární složka je normální hvězda A5V ve středu svého pobytu na hlavní posloupnosti s extrémně pomalou subsynchronní rotací (P_rot přibližně 14 dní!). Fotometrické monitorování od roku 1982 odhalilo orbitálně modulované variace se změnami tvaru a amplitudy. Pro studium byla použita metoda pokročilejší analýzy hlavních složek (advanced principal component analysis - APCA).

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Links

IAA301630901, research and development project	Name: Rozložení energie ve spektru horkých hvězd a jeho proměnnost Investor: Academy of Sciences of the Czech Republic, Spectral energy distribution of hot stars and its variability
MEB080832, research and development project	Name: Rozložení energie ve spektrech chemicky pekuliárních hvězd a jeho proměnnost Investor: Ministry of Education, Youth and Sports of the CR, Spectral energy distribution in chemically peculiar stars and its variability, Programme KONTAKT - mobilities (MEB)