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{{Starbox begin
| name = γ Columbae
}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0 (ICRS)
| constell = Columba
| ra = {{RA|05|57|32.20958}}
| dec = {{DEC|−35|16|59.8153}}
| appmag_v = {{nowrap|4.366 + 12.664}}[3]
}}{{Starbox character
| class = B2.5 IV[4] + G8 V[5]
| b-v = −0.18[6]
| u-b = −0.66[6]
| r-i =
| variable = Candidate SPB[8]
}}{{Starbox astrometry
| radial_v = +24.2[9]
| prop_mo_ra = −3.24
| prop_mo_dec = +10.21
| parallax = 3.75
| p_error = 0.18
| parallax_footnote =
| absmag_v = −2.76[13]
}}{{Starbox detail
| source = [8]
| component1 = γ Col A
| mass = {{Val|5.7|0.3}}
| radius = {{Val|4.8|0.4}}
| luminosity = 2,070[15]
| temperature = 12,904[15]
| gravity = {{Val|3.72|0.20}}
| metal_fe =
| rotational_velocity = {{Val|96|16}}
| rotation =
| age_myr = {{Val|23.6|2.0}}[17]
| component2 = γ Col B
| mass2 = 0.94[3]
| lumonosity2 = 0.55[3]
| temperature2 = 5,367[3]
}}{{Starbox catalog
| names = γ Col, BD−35° 2612, HD 40494, HIP 28199, HR 2106, SAO 196352.[21]
}}{{Starbox reference
| Simbad = gam+Col
}}{{starbox end}}Gamma Columbae, Latinized from γ Columbae, is a possible[3] wide binary star system in the southern constellation of Columba. It is visible to the naked eye with an apparent visual magnitude of 4.36.[6] Based upon an annual parallax shift of 3.75 mas,[ it is located roughly 870 light years from the Sun. For early Arabian astronomers, this star, along with ζ CMa, λ CMa, δ Col, θ Col, κ Col, λ Col, μ Col and ξ Col, formed Al Ḳurūd (ألقرد - al-qird), the Apes.[25]]The primary component is an evolved[8] B-type subgiant star with a stellar classification of B2.5 IV.[4] It is a candidate slowly pulsating B-type star with a mean longitudinal magnetic field strength of {{Val|94|28|ul=G}}.[8] The star has nearly six times the mass of the Sun and close to five times the Sun's girth.[8] It is radiating over 2,000 times the solar luminosity from its outer atmosphere at an effective temperature of 12,904 K.[15] The estimated age of this star is around 24 million years.[17] The visual magnitude 12.664[3] companion is a G-type main sequence star with a classification of G8 V.[5] It lies at an angular separation of 33.8 arc seconds from the primary, which corresponds to a projected physical separation of 8,844 AU.[3] Despite the young age of these stars, there has been no X-ray emission detected.[3] References1. ^1 {{citation | 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 | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
2. ^1 2 3 4 5 6 7 8 {{citation | title=Binary systems with post-T Tauri secondaries | display-authors=1 | last1=Gerbaldi | first1=M. | last2=Faraggiana | first2=R. | last3=Balin | first3=N. | journal=Astronomy and Astrophysics | postscript=. | volume=379 | pages=162–184 | date=November 2001 | doi=10.1051/0004-6361:20011298 | bibcode=2001A&A...379..162G }}
3. ^1 2 {{citation | title=X-ray emission from Lindroos binary systems | display-authors=1 | last1=Huélamo | first1=N. | last2=Neuhäuser | first2=R. | last3=Stelzer | first3=B. | last4=Supper | first4=R. | last5=Zinnecker | first5=H. | journal=Astronomy and Astrophysics | volume=359 | pages=227–241 | date=July 2000 | bibcode=2000A&A...359..227H | postscript=. |arxiv = astro-ph/0005348 }}
4. ^1 2 {{citation | display-authors=1 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | pages=190 | year=2011 | bibcode=2011MNRAS.410..190T | doi=10.1111/j.1365-2966.2010.17434.x | arxiv=1007.4883 | postscript=. }}
5. ^1 2 3 4 5 {{citation | title=New magnetic field measurements of β Cephei stars and slowly pulsating B stars | last1=Hubrig | first1=S. | last2=Briquet | first2=M. | last3=De Cat | first3=P. | last4=Schöller | first4=M. | last5=Morel | first5=T. | last6=Ilyin | first6=I. | journal=Astronomische Nachrichten | display-authors=1 | volume=330 | issue=4 | page=317 | date=April 2009 | doi=10.1002/asna.200811187 | bibcode=2009AN....330..317H | arxiv=0902.1314 | postscript=. }}
6. ^1 2 3 {{cite journal | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
7. ^1 2 {{citation | display-authors=1 | last1=Hiltner | first1=W. A. | last2=Garrison | first2=R. F. | last3=Schild | first3=R. E. | title=MK Spectral Types for Bright Southern OB Stars | journal=Astrophysical Journal | postscript=. | volume=157 | pages=313–326 | date=July 1969 | doi=10.1086/150069 | bibcode=1969ApJ...157..313H }}
8. ^1 {{citation | last=Wilson | first=R. E. | year=1953 | postscript=. | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution for Science | bibcode=1953GCRV..C......0W | lccn=54001336 }}
9. ^1 2 3 {{citation | last=Johnson | first=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Commission Lunar and Planetary Laboratory | date=1999 | volume=4 | pages=99 | bibcode=1966CoLPL...4...99J | postscript=. }}
10. ^1 {{citation | last=Davis Jr. | first=G. A. | title=The Pronunciations, Derivations, and Meanings of a Selected List of Star Names | journal=Popular Astronomy | volume=18 | page=14 |date=October 1944 | bibcode=1944PA.....52....8D | postscript=. }}
11. ^1 {{citation | title=gam Col -- Variable Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=gam+Col | accessdate=2016-12-19 | postscript=. }}
[1][2][3][4][5][6][7][8][9][10][11]
}}External links
| first1=James B. | last1=Kaler | date=January 29, 2016
| title=Gamma Columbae | work=STARS | publisher=University of Illinois
| url=http://stars.astro.illinois.edu/sow/gammacol.html
| accessdate=2016-12-21 | postscript=. }}{{Stars of Columba|state=collapsed}} 8 : B-type subgiants|G-type main-sequence stars|Bayer objects|Columba (constellation)|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |