36 Lyncis
{{Short description|Star in the constellation Lynx}}
{{Starbox begin}}
{{Starbox image
| image = 250px
| caption = A light curve for EI Lyncis, plotted from TESS data
}}
{{Starbox observe
| epoch = J2000
| dec = {{DEC|+43|13|04.1940}}
| constell = Lynx
}}
{{Starbox character
| u-b =
| variable = SX Ari
}}
{{Starbox astrometry
| parallax = 5.2687
| p_error = 0.1577
}}
{{Starbox detail
| rotational_velocity = {{Val|49|1}}
| rotation = {{Val|3.83476|0.00004|u=days|fmt=commas}}
| age_myr =
}}
{{Starbox catalog
| names = {{odlist | V=EI Lyn | F=36 Lyn | BD=+43°1893 | FK5=346 | HD=79158 | HIP=45290 | HR=3652 | SAO=42759 }}
}}
{{Starbox reference
| Simbad=36+Lyn
}}
{{Starbox end}}
36 Lyncis is a solitary variable star located around 620 light years away from the Sun in the northern constellation of Lynx. It has the variable star designation of EI Lyncis, while 36 Lyncis is the Flamsteed designation. This object is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.30. It is moving further away from the Earth with a heliocentric radial velocity of 21 km/s.
This is a magnetic, helium-weak Bp star with a stellar classification of B9IVpHgMn, although the spectral peculiarities have led to alternate classifications such as B8 IIImnp. It is sometimes classified as a mercury-manganese star. It is also an 'sn' star, displaying a spectrum with generally sharp lines for most elements in combination with broad, diffuse lines of helium. 36 Lyncis has been classified as an SX Arietis variable with an amplitude of 0.03 in visual magnitude and a rotationally-modulated period of 3.834 days. The star is spinning with a projected rotational velocity of 49 km/s and a rotation rate of 3.83476 days. It has 4.21 times the Sun's radius and is radiating 505 times the luminosity of the Sun from its photosphere at an effective temperature of {{val|13,700|ul=K|fmt=commas}}.
References
{{reflist|30em|refs=
{{cite Gaia DR3|817013387993056640}}
{{cite simbad | title=36 Lyncis | access-date=2019-06-06}}
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| publisher=American Association of Variable Star Observers
| url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=136468
| access-date=21 October 2022}}
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| doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}
| title=UVBY photometry of the magnetic CP stars HD 36668, 36 Lyncis, HD 86592, and HR 8861
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| volume=357 | pages=548–552 | date=May 2000
| bibcode=2000A&A...357..548A }}
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| title=The SN Stars: Magnetically Controlled Stellar Winds Among the Helium-Weak Stars
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| volume=94 | page=737 | date=September 1987
| doi=10.1086/114512 | bibcode=1987AJ.....94..737S | doi-access=free }}
}}
{{Stars of Lynx}}
{{DEFAULTSORT:36 Lyncis}}