27 Lyncis
{{Short description|Star in the constellation Lynx}}
{{Starbox begin}}
{{Starbox observe
| epoch = J2000
| constell = Lynx
| dec = {{DEC|+51|30|24.0055}}
}}
{{Starbox character
| type = main sequence
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|+11.0|4.2}}
| parallax = 13.04
| p_error = 0.31
}}
{{Starbox detail
| source =
| radius =
| temperature = {{Val|10014|340|fmt=commas}}
| metal_fe =
}}
{{Starbox catalog
| names = {{odlist | F=27 Lyn | BD=+51°1391 | FK5=307 | HD=67006 | HIP=39847 | HR=3173 | SAO=26687 | WDS=J08085+5130A }}
}}
{{Starbox reference
| Simbad = 27+Lyn
}}
{{Starbox end}}
27 Lyncis is a single star in the northern constellation of Lynx. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.78. This object is located around 250 light years away from the Sun, as determine from parallax measurements. It is moving further from the Sun with a heliocentric radial velocity of +11 km/s.
This is an ordinary A-type main-sequence star with a stellar classification of A2 V, which indicates it is generating energy through hydrogen fusion at its core. It is 157 million years old and is spinning with a projected rotational velocity of 183. The star has 2.24 times the mass of the Sun and is radiating 65 times the Sun's luminosity from its photosphere at an effective temperature of 10,014 K. X-ray emission is being detected near these coordinates, which may be coming from an undetected companion or a background source.
References
{{reflist|refs=
{{cite simbad | title=27 Lyn | accessdate=2019-06-06}}
| title=Validation of the new Hipparcos reduction
| last1=van Leeuwen | first1=F.
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664 | date=2007
| arxiv=0708.1752 | bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}
| 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 | s2cid=119257644 | postscript=. }}
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
| title=A catalogue of multiplicity among bright stellar systems
| journal=Monthly Notices of the Royal Astronomical Society
| volume=389 | issue=2 | pages=869–879 | date=September 2008
| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E
| arxiv=0806.2878 | s2cid=14878976 | postscript=. }}
| last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A.
| title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets
| journal=The Astrophysical Journal
| volume=804 | issue=2 | pages=146 | year=2015
| bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146
| arxiv=1501.03154 | s2cid=33401607 | postscript=. }}
| last1=Cowley | first1=A. | last2=Cowley | first2=C.
| last3=Jaschek | first3=M. | last4=Jaschek | first4=C.
| title=A study of the bright A stars. I. A catalogue of spectral classifications
| display-authors=1 | journal=Astronomical Journal
| volume=74 | pages=375–406 | date=April 1969
| doi=10.1086/110819 | bibcode=1969AJ.....74..375C }}
| display-authors=1 | last1=De Rosa | first1=R. J.
| last2=Bulger | first2=J. | last3=Patience | first3=J.
| last4=Leland | first4=B. | last5=Macintosh | first5=B.
| last6=Schneider | first6=A. | last7=Song | first7=I.
| last8=Marois | first8=C. | last9=Graham | first9=J. R.
| last10=Bessell | first10=M. | last11=Doyon | first11=R.
| title=The Volume-limited A-Star (VAST) survey - I. Companions and the unexpected X-ray detection of B6-A7 stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=415 | issue=1 | pages=854–866 | date=July 2011
| doi=10.1111/j.1365-2966.2011.18765.x | doi-access=free | bibcode=2011MNRAS.415..854D
| postscript=. | arxiv=1103.4363 | s2cid=84181878 }}
}}
{{Stars of Lynx}}
{{DEFAULTSORT:27 Lyncis}}
Category:A-type main-sequence stars