D 2015

O-C diagrams and period changes in stellar systems

LIŠKA, Jiří and Marek SKARKA

Basic information

Original name

O-C diagrams and period changes in stellar systems

Authors

LIŠKA, Jiří (203 Czech Republic, guarantor, belonging to the institution) and Marek SKARKA (203 Czech Republic, belonging to the institution)

Edition

Czech Republic, Proceedings of the 46th Conference on Variable Stars Research, p. 38-44, 2015

Publisher

Sekce pozorovatelů proměnných hvězd České astronomické společnosti

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

electronic version available online

References:

RIV identification code

RIV/00216224:14310/15:00082448

Organization unit

Faculty of Science

ISSN

Keywords in English

O-C diagram; variable star; binary star; pulsating star
Změněno: 31/3/2015 10:33, Mgr. Marek Skarka, Ph.D.

Abstract

V originále

Based on the visual inspection of all O-C diagrams available in the O-C gateway managed by the Variable stars and exoplanet section of the Czech astronomical society we present an overview of possible shapes of O-C diagrams together with discussion of possible effects causing such dependences. The nature of these effects is discussed for various types of periodic variable. We also give short remarks on interesting eclipsing systems BV Dra and BW Dra which form a visual pair and show antiparallel changes of their O-C diagrams. In addition we comment on period changes of UU Cam, and argue that it probably shows long-term Light Time Effect (LiTE) rather than sudden period change. Effects which are observable only in ultra-precise, quasi-continual measurements gathered by the Kepler satellite are discussed at the end of this contribution.