Analysis of the multiple system with chemically peculiar
component phi Draconis

J 2016

Analysis of the multiple system with chemically peculiar component phi Draconis

LIŠKA, Jiří

Basic information

Original name

Analysis of the multiple system with chemically peculiar component phi Draconis

Authors

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

Edition

Monthly Notices of the Royal Astronomical Society, Priestley and Weale, 2016, 0035-8711

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 4.961

RIV identification code

RIV/00216224:14310/16:00094209

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1093/mnras/stw1355

UT WoS

000383272500070

Keywords in English

binaries: spectroscopic; binaries: visual; stars: chemically peculiar; stars: individual: phi Dra; stars: variables: general

Abstract

V originále

The star phi Dra comprises a spectroscopic binary and a third star that together form a visual triple system. It is one of the brightest chemically peculiar stars of the upper main sequence. Despite these facts, no comprehensive study of its multiplicity has been performed yet. In this work, we present a detailed analysis of the triple system based on available measurements. We use radial velocities taken from four sources in the literature in a re-analysis of the inner spectroscopic binary (Aab). An incorrect value of the orbital period of the inner system Aab about 27 d was accepted in literature more than 40 yr. A new solution of orbit with the 128-d period was determined. Relative position measurements of the outer visual binary system (AB) from Washington Double Star Catalog were compared with known orbital models. Furthermore, it was shown that astrometric motion in system AB is well described by the model of Andrade with a 308-yr orbital period. Parameters of A and B components were utilized to estimate individual brightness for all components and their masses from evolutionary tracks. Although we found several facts which support the gravitational bond between them, unbound solution cannot be fully excluded yet.

Links

GA13-10589S, research and development project

Name: Ztráta hmoty horkých hmotných hvězd

Investor: Czech Science Foundation

Citovat

LIŠKA, Jiří. Analysis of the multiple system with chemically peculiar component phi Draconis. Monthly Notices of the Royal Astronomical Society. Priestley and Weale, 2016, vol. 461, No 1, p. 939-947. ISSN 0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stw1355.

@article{1365456,
   author = {Liška, Jiří},
   article_number = {1},
   doi = {http://dx.doi.org/10.1093/mnras/stw1355},
   keywords = {binaries: spectroscopic; binaries: visual; stars: chemically peculiar; stars: individual: phi Dra; stars: variables: general},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Analysis of the multiple system with chemically peculiar component phi Draconis},
   url = {http://mnras.oxfordjournals.org/content/461/1/939.full.pdf},
   volume = {461},
   year = {2016}
}

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ID  - 1365456
AU  - Liška, Jiří
PY  - 2016
TI  - Analysis of the multiple system with chemically peculiar component phi Draconis
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 461
IS  - 1
SP  - 939-947
EP  - 939-947
PB  - Priestley and Weale
SN  - 00358711
KW  - binaries: spectroscopic
KW  - binaries: visual
KW  - stars: chemically peculiar
KW  - stars: individual: phi Dra
KW  - stars: variables: general
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L2  - http://mnras.oxfordjournals.org/content/461/1/939.full.pdf
N2  - The star phi Dra comprises a spectroscopic binary and a third star that together form a visual triple system. It is one of the brightest chemically peculiar stars of the upper main sequence. Despite these facts, no comprehensive study of its multiplicity has been performed yet. In this work, we present a detailed analysis of the triple system based on available measurements. We use radial velocities taken from four sources in the literature in a re-analysis of the inner spectroscopic binary (Aab). An incorrect value of the orbital period of the inner system Aab about 27 d was accepted in literature more than 40 yr. A new solution of orbit with the 128-d period was determined. Relative position measurements of the outer visual binary system (AB) from Washington Double Star Catalog were compared with known orbital models. Furthermore, it was shown that astrometric motion in system AB is well described by the model of Andrade with a 308-yr orbital period. Parameters of A and B components were utilized to estimate individual brightness for all components and their masses from evolutionary tracks. Although we found several facts which support the gravitational bond between them, unbound solution cannot be fully excluded yet.
ER  -

LIŠKA, Jiří. Analysis of the multiple system with chemically peculiar component phi Draconis. \textit{Monthly Notices of the Royal Astronomical Society}. Priestley and Weale, 2016, vol.~461, No~1, p.~939-947. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stw1355.

Detailed Information on Publication Record