Star in the constellation Coma Berenices
14 Comae Berenices is a single[ 3] star in the northernconstellation ofComa Berenices , and is the second brightest[ 8] Coma Star Cluster .[ 3] apparent visual magnitude of 4.95.[ 2] Parallax measurements place the star at a distance of about 266 light years .[ 1]
Thespectrum of this star ispeculiar and it has been assigned a number of differentstellar classifications : A5, F0p,F0 III Sr , F0 vp,[ 3] F1 IV: np Sr shell ,[ 5] A9 IV np Sr II ,[ 10] [ 11] A9 V + shell .[ 12] Lambda Boötis star but this was later refuted.[ 10] surface magnetic field has been detected on 14 Comae Bernices.[ 13]
14 Comae Berenices is a well-known[ 12] [ 8] shell star with a high rate of spin, showing aprojected rotational velocity of 226 km/s.[ 7] oblate shape with anequatorial bulge that is 12% larger than the polar radius.[ 4] [ 5] Sun's luminosity from itsphotosphere at aneffective temperature of 7,300 K.[ 8]
^a b c d e f Brown, A. G. A. ; et al. (Gaia collaboration ) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties" .Astronomy & Astrophysics 616 . A1.arXiv :1804.09365 Bibcode :2018A&A...616A...1G doi :10.1051/0004-6361/201833051 Gaia DR2 record for this source atVizieR .^a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".CDS/ADC Collection of Electronic Catalogues .2237 .Bibcode :2002yCat.2237....0D . ^a b c d Abou Elazm, M. S. (October 1993), "The composite spectrum of the A type star 14 Comae",Astrophysics and Space Science ,208 (1):1– 4,Bibcode :1993Ap&SS.208....1A ,doi :10.1007/BF00658127 ,S2CID 123520053 ^a b van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars",The Astronomy and Astrophysics Review ,20 (1): 51,arXiv :1204.2572 Bibcode :2012A&ARv..20...51V ,doi :10.1007/s00159-012-0051-2 ,S2CID 119273474 ^a b c d 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 . ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system".Astronomy Letters .32 (11):759– 771.arXiv :1606.08053 Bibcode :2006AstL...32..759G .doi :10.1134/S1063773706110065 .S2CID 119231169 . ^a b c d Pizzolato, N.; et al. (2000). "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases".Astronomy and Astrophysics .361 : 614.Bibcode :2000A&A...361..614P . ^a b c d e Dominy, J. F.; Smith, M. A. (1977). "A spectroscopic study of 14 Comae and other A-type shell stars".Astrophysical Journal .217 : 494.Bibcode :1977ApJ...217..494D .doi :10.1086/155598 . ^ "14 Com" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2019-01-02 .^a b Murphy, Simon J.; et al. (October 2015), "An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue",Publications of the Astronomical Society of Australia ,32 : 43,arXiv :1508.03633 Bibcode :2015PASA...32...36M ,doi :10.1017/pasa.2015.34 ,S2CID 59405545 , e036 ^ Gray, R. O.; et al. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars".The Astronomical Journal .121 (4): 2148.Bibcode :2001AJ....121.2148G .doi :10.1086/319956 . ^a b Abt, Helmut A.; Willmarth, Daryl W. (August 1999), "Binaries in the Praesepe and Coma Star Clusters and Their Implications for Binary Evolution",The Astrophysical Journal ,521 (2):682– 690,Bibcode :1999ApJ...521..682A ,doi :10.1086/307569 S2CID 119772785 ^ Kudryavtsev, D. O.; et al. (November 2006)."New magnetic chemically peculiar stars" .Monthly Notices of the Royal Astronomical Society .372 (4):1804– 1828.Bibcode :2006MNRAS.372.1804K .doi :10.1111/j.1365-2966.2006.10994.x
