}}{{Starbox reference
| Simbad=14+Com
}}{{Starbox end}}14 Comae Berenices is a single[4] star in the northern constellation of Coma Berenices, and is the second brightest[13] member of the Coma Star Cluster.[4] It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.95.[3] Parallax measurements place the star at a distance of about 266 light years.[1]The spectrum of this star is peculiar and it has been assigned a number of different stellar classifications: A5, F0p, {{nowrap|F0 III Sr}}, F0 vp,[4] {{nowrap|F1 IV: np Sr shell}},[6] {{nowrap|A9 IV np Sr II}},[26] F1 IV,[27] and {{nowrap|A9 V + shell}}.[28] Abt & Morrell (1995) designated this a Lambda Boötis star but this was later refuted.[26] No surface magnetic field has been detected on 14 Comae Bernices.[30]
14 Comae Berenices is a well-known[28][13] shell star with a high rate of spin, showing a projected rotational velocity of 226 km/s.[12] This is giving the star an oblate shape with an equatorial bulge that is 12% larger than the polar radius.[5] It is radiating 76[6] times the Sun's luminosity from its photosphere at an effective temperature of 7,300 K.[13]
References
1. ^1 2 3 4 5 6 {{Cite Gaia DR2|4009103588563247104}}
2. ^1 2 3 4 {{cite journal | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | arxiv=1108.4971 | doi=10.1134/S1063773712050015 }}
3. ^1 2 {{citation | last1=van Belle | first1=Gerard T. | title=Interferometric observations of rapidly rotating stars | journal=The Astronomy and Astrophysics Review | volume=20 | issue=1 | page=51 | date=March 2012 | doi=10.1007/s00159-012-0051-2 | bibcode=2012A&ARv..20...51V | arxiv=1204.2572 }}
4. ^1 2 {{citation | title=An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue | last1=Murphy | first1=Simon J. | last2=Corbally | first2=Christopher J. | last3=Gray | first3=Richard O. | last4=Cheng | first4=Kwang-Ping | last5=Neff | first5=James E. | last6=Koen | first6=Chris | last7=Kuehn | first7=Charles A. | last8=Newsome | first8=Ian | last9=Riggs | first9=Quinlin | display-authors=1 | journal=Publications of the Astronomical Society of Australia | volume=32 | id=e036 | pages=43 | date=October 2015 | doi=10.1017/pasa.2015.34 | bibcode=2015PASA...32...36M }}
5. ^1 2 {{citation | title=Binaries in the Praesepe and Coma Star Clusters and Their Implications for Binary Evolution | last1=Abt | first1=Helmut A. | last2=Willmarth | first2=Daryl W. | journal=The Astrophysical Journal | volume=521 | issue=2 | pages=682–690 | date=August 1999 | doi=10.1086/307569 | bibcode=1999ApJ...521..682A }}
6. ^1 2 3 4 {{citation | title=The composite spectrum of the A type star 14 Comae | last1=Abou Elazm | first1=M. S. | journal=Astrophysics and Space Science | volume=208 | issue=1 | pages=1–4 | date=October 1993 | doi=10.1007/BF00658127 | bibcode=1993Ap&SS.208....1A }}
7. ^1 2 3 4 5 {{cite journal | last1=Dominy | first1=J. F. | last2=Smith | first2=M. A. | title=A spectroscopic study of 14 Comae and other A-type shell stars | journal=Astrophysical Journal | volume=217 | page=494 | year=1977 | bibcode=1977ApJ...217..494D | doi=10.1086/155598 }}
8. ^1 2 3 4 {{cite journal | last1=Pizzolato | first1=N. | last2=Maggio | first2=A. | last3=Sciortino | first3=S. | display-authors=1 | title=Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases | journal=Astronomy and Astrophysics | volume=361 | pages=614 | year=2000 | bibcode=2000A&A...361..614P }}
9. ^1 {{cite journal | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32 | issue=11 | pages=759 | year=2006 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | doi=10.1134/S1063773706110065 }}
10. ^1 {{cite journal | last1=Gray | first1=R. O. | last2=Napier | first2=M. G. | last3=Winkler | first3=L. I. | display-authors=1 | title=The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars | journal=The Astronomical Journal | volume=121 | issue=4 | page=2148 | year=2001 | bibcode=2001AJ....121.2148G | doi=10.1086/319956 }}
11. ^1 2 3 {{cite journal | last1=Ducati | first1=J. R. | title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system | journal=CDS/ADC Collection of Electronic Catalogues | volume=2237 | year=2002 | bibcode=2002yCat.2237....0D }}
12. ^1 {{cite journal | display-authors=1 | title=New magnetic chemically peculiar stars | last1=Kudryavtsev | first1=D. O. | last2=Romanyuk | first2=I. I. | last3=Elkin | first3=V. G. | last4=Paunzen | first4=E. | journal=Monthly Notices of the Royal Astronomical Society | volume=372 | issue=4 | pages=1804–1828 | date=November 2006 | doi=10.1111/j.1365-2966.2006.10994.x | bibcode=2006MNRAS.372.1804K }}