GZ Velorum
{{Short description|Star in the constellation Vela}}
{{Starbox begin
| name = GZ Velorum
}}
{{Starbox image
| image = 250px
| caption = An R band light curve for GZ Velorum, adapted from Kallinger (2019)
}}
{{Starbox observe
| epoch = J2000
| constell = Vela
| dec = {{DEC|−55|01|45.4852}}
}}
{{Starbox character
| type =
| u-b =
| variable = LC
}}
{{Starbox astrometry
| radial_v = {{Val|+12.9|0.8}}
| parallax = 2.4256
| p_error = 0.1938
}}
{{Starbox detail
| source =
}}
{{Starbox catalog
| names={{odlist | V=GZ Vel | CD=−54° 3415 | FK5=2830 | HD=89682 | HIP=50555 | HR=4063 | SAO=237916 }}
}}
{{Starbox reference
| Simbad = HD+89682
}}
{{Starbox end}}
GZ Velorum is a single, orange-hued star in the southern constellation of Vela. It is a faint star but visible to the naked eye, having an apparent visual magnitude of 4.58. The star is located around 1,300 light years from Earth, as determined from its annual parallax shift of {{Val|2.4|ul=mas}}. It is moving further away with a heliocentric radial velocity of +13 km/s.
This is a bright giant star with a stellar classification of K2.5 II. It is a slow irregular variable of type LC with a frequency of 0.16585 cycles per day. In the R (red) band, the magnitude of the star ranges from 3.43 down to 3.81. The measured angular diameter of this star, after correction for limb darkening, is {{Val|3.17|0.04|u=mas}}. At the estimated distance of GZ Vel, this yields a physical size of about 140 times the radius of the Sun.
GZ Vel is 30 million years old with 9 times the mass of the Sun. It is radiating 9,241 times the Sun's luminosity from its photosphere at an effective temperature of 4,140 K.
References
{{reflist|refs=
{{cite simbad | title=HD 89682 | access-date=16 August 2018 }}
{{Cite Gaia DR2|5355253335378307968}}
| title=XHIP: An extended hipparcos compilation
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| journal=Astronomy Letters
| volume=38 | issue=5 | page=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}
| 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
| doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | bibcode=2011MNRAS.410..190T
| arxiv=1007.4883 | s2cid=118629873 }}
| display-authors=1 | last1=Hohle | first1=M.M.
| last2=Neuhäuser | first2=R. | last3=Schutz | first3=B.F.
| title=Masses and luminosities of O- and B-type stars and red supergiants
| journal=Astronomische Nachrichten
| volume=331 | issue=4 | page=349 | year=2010
| bibcode=2010AN....331..349H | doi=10.1002/asna.200911355
| arxiv=1003.2335 | s2cid=111387483 | postscript=. }}
| title=Multiplicity among Solar-type Stars
| journal=The Astrophysical Journal
| volume=836 | page=139 | year=2017
| display-authors=1 | postscript=.
| last1=Fuhrmann | first1=K. | last2=Chini | first2=R.
| last3=Kaderhandt | first3=L. | last4=Chen | first4=Z.
| issue=1
| bibcode=2017ApJ...836..139F | doi=10.3847/1538-4357/836/1/139 | doi-access=free }}
| display-authors=1 | postscript=.
| last1=Lèbre | first1=A. | last2=de Laverny | first2=P.
| last3=Do Nascimento | first3=J. D. Jr. | last4=de Medeiros | first4=J. R.
| title=Lithium abundances and rotational behavior for bright giant stars
| journal=Astronomy and Astrophysics
| volume=450 | issue=3 | pages=1173–1179 | date=May 2006
| doi=10.1051/0004-6361:20053485 | bibcode=2006A&A...450.1173L | doi-access=free | url=https://repositorio.ufrn.br/bitstream/123456789/29002/1/LithiumAbundancesAndRotationalBehavior_2006.pdf }}
| last1=Koen | first1=Chris | last2=Eyer | first2=Laurent
| title=New periodic variables from the Hipparcos epoch photometry
| journal=Monthly Notices of the Royal Astronomical Society
| volume=331 | issue=1 | pages=45–59 | date=March 2002
| doi=10.1046/j.1365-8711.2002.05150.x | doi-access=free | bibcode=2002MNRAS.331...45K
| arxiv=astro-ph/0112194 | s2cid=10505995 | postscript=. }}
| title=General catalogue of variable stars: Version GCVS 5.1
| last1=Samus' | first1=N. N | last2=Kazarovets | first2=E. V
| last3=Durlevich | first3=O. V | last4=Kireeva | first4=N. N
| last5=Pastukhova | first5=E. N | journal=Astronomy Reports
| volume=61 | pages=80–88 | year=2017 | issue=1 | postscript=.
| doi=10.1134/S1063772917010085 | bibcode=2017ARep...61...80S | s2cid=125853869 }}
| display-authors=1 | last1=Richichi | first1=A.
| last2=Percheron | first2=I. | last3=Khristoforova | first3=M.
| title=CHARM2: An updated Catalog of High Angular Resolution Measurements
| journal=Astronomy and Astrophysics | postscript=.
| volume=431 | pages=773–777 | date=February 2005
| issue=2 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | doi-access=free }}
| first1=Kenneth R. | last1=Lang
| title=Astrophysical formulae | volume=1
| series=Astronomy and astrophysics library
| edition=3rd | publisher=Birkhäuser
| date=2006 | isbn=3-540-29692-1
| url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41
}}. The radius (R*) is given by:
:
& = \frac{(412\cdot 3.17\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
& \approx 281\cdot R_{\bigodot}
\end{align}
| title=The Perkins catalog of revised MK types for the cooler stars
| last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C.
| journal=Astrophysical Journal Supplement Series
| volume=71 | page=245 | year=1989 | postscript=.
| doi=10.1086/191373 | bibcode=1989ApJS...71..245K | s2cid=123149047 }}
| last1=Gontcharov | first1=G. A.
| title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system
| journal=Astronomy Letters
| volume=32| issue=11| pages=759–771| date=November 2006
| doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G
| arxiv=1606.08053 | s2cid=119231169
| postscript=. }}
}}
{{Stars of Vela}}
{{DEFAULTSORT:GZ Velorum}}