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Probable binary star system in the constellation Coma Berenices
13 Comae Berenices is a probable
binary star
[3] system in the northern
constellation of
Coma Berenices . It has an
apparent visual magnitude of 5.17,
[2] which is bright enough to be faintly visible to the naked eye. With an annual
parallax shift of 12.33
mas ,
[1] it is located around 260
light years from the Sun. It is member of the nearby
Coma Star Cluster (Melotte 111).
[7]
Based on measured changes in the star's motion, this is most likely an
astrometric binary system.
[3] The visible component is an
A-type main-sequence star with a
stellar classification of A3 V.
[3] It is catalogued as an
Alpha2 Canum Venaticorum variable
[8] with the
designation GN Com.
[9] Rensom (1990) listed it as a suspected
Am star .
[10] The system is a source of
X-ray emission , which may be coming from the companion.
[11]
References
^
a
b
c
d
e
f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664,
arXiv :
0708.1752 ,
Bibcode :
2007A&A...474..653V ,
doi :
10.1051/0004-6361:20078357 ,
S2CID
18759600 .
^
a
b
c
d
e
f
g Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331,
arXiv :
1108.4971 ,
Bibcode :
2012AstL...38..331A ,
doi :
10.1134/S1063773712050015 ,
S2CID
119257644 .
^
a
b
c
d Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems",
Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879,
arXiv :
0806.2878 ,
Bibcode :
2008MNRAS.389..869E ,
doi :
10.1111/j.1365-2966.2008.13596.x ,
S2CID
14878976 .
^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14,
arXiv :
1208.3048 ,
Bibcode :
2012A&A...546A..61D ,
doi :
10.1051/0004-6361/201219219 ,
S2CID
59451347 , A61.
^
a
b
c
d
e David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal , 804 (2): 146,
arXiv :
1501.03154 ,
Bibcode :
2015ApJ...804..146D ,
doi :
10.1088/0004-637X/804/2/146 ,
S2CID
33401607 .
^
"13 Com" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2018-02-17 .
^ Casewell, S. L.; et al. (January 2006), "New stellar members of the Coma Berenices open star cluster",
Monthly Notices of the Royal Astronomical Society , 365 (2): 447–453,
arXiv :
astro-ph/0510133 ,
Bibcode :
2006MNRAS.365..447C ,
doi :
10.1111/j.1365-2966.2005.09689.x ,
S2CID
17595520 .
^ Hoffleit, D. (October 1982), "Variable stars in the General Catalogue of Trigonometric Parallaxes", Bulletin d'Information du Centre de Données Stellaires , 23 : 53,
Bibcode :
1982BICDS..23...53H . See entry 2855.
^ Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (January 1975), "60th Name-List of Variable Stars", Information Bulletin on Variable Stars , 961 : 1,
Bibcode :
1975IBVS..961....1K .
^ Renson, P. (December 1990), "Liste des étoiles Ap et Am dans les amas ouverts (Edition révisée)", Bulletin d'Information du Centre de Données Stellaires (in French), 38 : 151,
Bibcode :
1990BICDS..38..151R .
^ Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars", Astronomy and Astrophysics , 475 (2): 677−684,
Bibcode :
2007A&A...475..677S ,
doi :
10.1051/0004-6361:20077429 .