HD 79447
{{Short description|Star in the constellation Carina}}
{{about|i Carinae|I Carinae|HD 90589|ι Carinae|Iota Carinae|l Carinae|HD 84810}}
{{Starbox begin}}
{{Starbox observe
| epoch = J2000.0
| constell = Carina
| dec = {{DEC|−62|19|01.1295}}
}}
{{Starbox character
| type =
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|+17.5|2.7}}
| parallax = 6.01
| p_error = 0.12
}}
{{Starbox detail
| source =
| temperature = {{Val|18900|500|fmt=commas}}
| metal_fe =
| rotation =
}}
{{Starbox catalog
| names = {{odlist | B=i Car | CPD=−61°1201 | HD=79447 | HIP=45101 | HR=3663 | SAO=250471 | GC=12707 }}
}}
{{Starbox reference
| Simbad = HD+79447
}}
{{Starbox end}}
HD 79447 is a single star in the southern constellation of Carina. It has the Bayer designation i Carinae, while HD 79447 is the identifier from the Henry Draper catalogue. This star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.96. It is located at a distance of approximately 540 light years from the Sun based on parallax, and has an absolute magnitude of −2.14. The star drifted further away with a radial velocity of +18 km/s. It is a candidate member of the Lower Centaurus–Crux group of the Sco OB2 association.
This object is a B-type main-sequence star with a stellar classification of B3V. A surface magnetic field has been detected with a strength on the order of {{Val|1|ul=kG}}. It has an estimated age of around 39 million years with no measured spin rate. The star has about 5.6 times the radius of the Sun and 7 times the Sun's mass. It is radiating over two thousand times the luminosity of the Sun from its photosphere at an effective temperature of 18,900 K.
References
{{Reflist|refs=
{{cite simbad | title=HD 79447 | access-date=2020-01-25 }}
{{cite XHIP|45101|mode=cs2|postscript=.}}
| last1=van Leeuwen | first1=F. | postscript=.
| title=Validation of the new Hipparcos reduction
| url=https://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html
| journal=Astronomy and Astrophysics | arxiv=0708.1752
| volume=474 | issue=2 | pages=653–664 | year=2007
| bibcode=2007A&A...474..653V | bibcode-access=free
| doi=10.1051/0004-6361:20078357 | doi-access=free }}
| title=Discovery of two new bright magnetic B stars: i Car and Atlas
| last1=Neiner | first1=Coralie | last2=Buysschaert | first2=Bram
| last3=Oksala | first3=Mary E. | last4=Blazère | first4=Aurore
| journal=Monthly Notices of the Royal Astronomical Society: Letters
| volume=454 | issue=1 | pages=L56–L60 | date=November 2015
| doi=10.1093/mnrasl/slv128 | doi-access=free | arxiv=1508.06784 | postscript=.
| bibcode=2015MNRAS.454L..56N | display-authors=1 }}
| last1=Levenhagen | first1=R. S. | last2=Leister | first2=N. V.
| title=Spectroscopic analysis of southern B and Be stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=371 | pages=252–262 | year=2006
| issue=1 | bibcode=2006MNRAS.371..252L | arxiv=astro-ph/0606149
| doi=10.1111/j.1365-2966.2006.10655.x | doi-access=free | s2cid=16492030 | postscript=. }}
| title=A spectroscopic survey on the multiplicity of high-mass stars
| journal=Monthly Notices of the Royal Astronomical Society
| last1=Chini | first1=R. | last2=Hoffmeister | first2=V. H.
| last3=Nasseri | first3=A. | last4=Stahl | first4=O.
| last5=Zinnecker | first5=H. | display-authors=1
| volume=424 | issue=3 | pages=1925–1929 | year=2012
| bibcode=2012MNRAS.424.1925C | arxiv=1205.5238
| doi=10.1111/j.1365-2966.2012.21317.x | doi-access=free
| s2cid=119120749
}}
| 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 | issue=1 | pages=190–200 | date=January 2011
| bibcode=2011MNRAS.410..190T | arxiv=1007.4883
| doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | s2cid=118629873 | postscript=. }}
| display-authors=1 | last1=Pasinetti Fracassini | first1=L. E.
| last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A.
| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)
| edition=Third | journal=Astronomy and Astrophysics
| volume=367 | issue=2 | pages=521–524 | date=February 2001
| bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289
| doi=10.1051/0004-6361:20000451 | s2cid=425754 | postscript=. }}
| last1=Uesugi | first1=Akira | last2=Fukuda | first2=Ichiro
| title=Catalogue of rotational velocities of the stars
| journal=Contributions from the Institute of Astrophysics and Kwasan Observatory
| date=1970 | publisher=University of Kyoto
| bibcode=1970crvs.book.....U | postscript=. }}
}}
{{Stars of Carina}}
{{DEFAULTSORT:HD 79447}}
Category:B-type main-sequence stars
Category:Carina (constellation)