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

Základní údaje

Originální název

Analysis of the multiple system with chemically peculiar component phi Draconis

Autoři

LIŠKA, Jiří (203 Česká republika, garant, domácí)

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.961

Kód RIV

RIV/00216224:14310/16:00094209

Organizační jednotka

Přírodovědecká fakulta

DOI

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

UT WoS

000383272500070

Klíčová slova anglicky

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

Štítky

AKR, rivok

Změněno: 11. 5. 2017 18:58, Ing. Andrea Mikešková

Anotace

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.

Návaznosti

GA13-10589S, projekt VaV

Název: Ztráta hmoty horkých hmotných hvězd

Investor: Grantová agentura ČR, Ztráta hmoty horkých hmotných hvězd

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, roč. 461, č. 1, s. 939-947. ISSN 0035-8711. Dostupné z: 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}
}

TY  - JOUR
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
UR  - http://mnras.oxfordjournals.org/content/461/1/939.full.pdf
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, roč.~461, č.~1, s.~939-947. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stw1355.

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