32 Virginis
{{short description|Variable star in the constellation Virgo}}
{{Starbox begin}}
{{Starbox image
| image = 250px
| caption = A light curve for FM Virginis, plotted from TESS data. The 103.51 minute period is marked in red.
}}
{{Starbox observe
| epoch = J2000.0
| dec = {{DEC|+07|40|23.9689}}
| constell = Virgo
}}
{{Starbox character
| class = F0 IIIm (primary) + A7V (secondary)
| variable = Delta Scuti
}}
{{Starbox astrometry
| radial_v =
| prop_mo_ra = {{val|-107.527|0.697}}
| prop_mo_dec = {{val|4.915|0.344}}
| parallax = 12.8075
| p_error = 0.3062
}}
{{Starbox orbit
| primary =
| name =
| period_unitless = {{val|38.324|ul=days}}
| eccentricity = {{val|0.074|0.006}}
| axis_unitless =
| inclination =
| node =
| periastron = {{val|2434039.463|0.038}}
| periarg =
| periarg_primary = {{val|210.02|5.1}}
| k1 = {{val|48.05|0.33}}
| k2 =
}}
{{Starbox detail
| component1 = primary (Delta Scuti variable)
| radius =
| luminosity =
| metal_fe =
| age_gyr =
| component2 = secondary
| radius2 =
| luminosity2 =
| temperature2 =
| gravity2 =
| age_gyr2 =
}}
{{Starbox catalog
| names = FM Vir, Bayer designation, HD 110951, BD+08 2639, HIP 62267, HR 4847, SAO 119574, Boss 3323
}}
{{Starbox reference
| Simbad = 32+Vir
}}
{{Starbox end}}
32 Virginis, also known as FM Virginis, is a star located about 250 light years from the Earth, in the constellation Virgo. Its apparent magnitude ranges from 5.20 to 5.28, making it faintly visible to the naked eye of an observer well away from city lights. 32 Virginis is a binary star, and the more massive component of the binary is a Delta Scuti variable star which oscillates with a dominant period of 103.51 minutes.
In 1914, Walter Sydney Adams announced that 32 Virginis is a spectroscopic binary. John Beattie Cannon published the first set of orbital elements for the binary system in 1915. Corrado Bartolini et al. made photometric observations of the star in early 1971, and found that the star showed variability due to pulsations. In 1974, 32 Virginis was given the variable star designation FM Virginis. Donald Kurtz et al. determined that the star was a Delta Scuti variable, in 1976.
The primary star is believed to be an Am star similar to rho Puppis - a pulsating post-main sequence star.
References
{{Reflist|30em|refs=
| title=MAST: Barbara A. Mikulski Archive for Space Telescopes
| url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html
| publisher=Space Telescope Science Institute |access-date=14 January 2023}}
{{cite Gaia DR2|3710456301811923712}}
| bibcode=2017ARep...61...80S
| 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 | year=2017 | volume=61 | issue=1 | page=80
| doi=10.1134/S1063772917010085 | s2cid=125853869 | doi-access= }}
| title=d02 Vir -- delta Sct Variable | access-date=2023-01-15}}
| last1=Douglas | first1=A. V.
| title=Spectroscopic magnitudes of A-type stars
| journal=Astrophysical Journal | date=November 1926 | volume=64 | pages=262–270
| doi=10.1086/143011 | bibcode=1926ApJ....64..262D
| url=https://ui.adsabs.harvard.edu/abs/1926ApJ....64..262D | access-date=16 January 2023}}
| last1=Liakos | first1=Alexios | last2=Niarchos | first2=Panagiotis
| title=Catalogue and properties of δ Scuti stars in binaries
| journal=Monthly Notices of the Royal Astronomical Society |date=February 2017
| volume=465 | issue=1 | pages=1181–1200
| doi=10.1093/mnras/stw2756 | doi-access=free | arxiv=1611.00200 | bibcode=2017MNRAS.465.1181L
}}
| last1=Adams | first1=W. S. | title=Ten Spectroscopic Binaries
| journal=Publications of the Astronomical Society of the Pacific
| date=December 1914 | volume=26 | issue=156 | page=261
| doi=10.1086/122362 | bibcode=1914PASP...26..261A
| s2cid=122672368 | doi-access=free }}
| last1=Cannon | first1=J. B. | title=Orbit of Boss 3323
| journal=Publications of the Dominion Observatory Ottawa
| date=1915 | volume=2 | pages=367–384 | bibcode=1915PDO.....2..367C
| url=https://ui.adsabs.harvard.edu/abs/1915PDO.....2..367C | access-date=16 January 2023}}
| last1=Bartolini | first1=C. | last2=Grilli | first2=F. | last3=Parmeggiani | first3=G.
| title=32 Virginis: a pulsating Am star | journal=Information Bulletin on Variable Stars
| date=August 1972 | volume=704 | issue=1 | page=1 | bibcode=1972IBVS..704....1B
| url=https://ui.adsabs.harvard.edu/abs/1972IBVS..704....1B | access-date=16 January 2023}}
| last1=Kukarkin | first1=B. V. | last2=Kholopov | first2=P. N. | last3=Kukarkina | first3=N. P.
| last4=Perova | first4=N. B. | title=60th Name-List of Variable Stars
| journal=Information Bulletin on Variable Stars
| date=January 1975 |volume=961 | issue=1 | page=1 | bibcode=1975IBVS..961....1K
| url=https://ui.adsabs.harvard.edu/abs/1975IBVS..961....1K | access-date=16 January 2023}}
| last1=Kurtz | first1=D. W. | last2=Breger | first2=M.
| last3=Evans | first3=S. W. | last4=Sandmann | first4=W. H.
| title=Metallicism, pulsation, and the nature of 32 Virginis
| journal=Astrophysical Journal | date=July 1976 | volume=207 | pages=181–189
| doi=10.1086/154482 | bibcode=1976ApJ...207..181K
| doi-access=free }}
| last1=Pyper | first1=Diane M. | last2=Adelman | first2=Saul J.
| title=Light Curve Changes and Possible Precession in mCP Stars
| journal=Publications of the Astronomical Society of the Pacific
| date=August 2021 | volume=133 | issue=1026
| page=084203 | doi=10.1088/1538-3873/ac1ac0 | bibcode=2021PASP..133h4203P
| s2cid=237301384 | doi-access=free }}
| last1=Bertiau | first1=F. C.
| title=The Orbits of the Spectroscopic Binaries Rho Orionis, Eta Bootis, and 32 Virginis
| journal=Astrophysical Journal | date=May 1957 | volume=125 | page=696
| doi=10.1086/146343 | bibcode=1957ApJ...125..696B
| url=https://articles.adsabs.harvard.edu/pdf/1957ApJ...125..696B | access-date=16 January 2023| doi-access=free }}
| last1=Mitton | first1=J. | last2=Stickland | first2=D. J.
| title=The nature of the components of the spectroscopic binary, 32 Virginis
| journal=Monthly Notices of the Royal Astronomical Society
| date=January 1979 | volume=186 | issue=2 | pages=189–195
| doi=10.1093/mnras/186.2.189 | doi-access=free | bibcode=1979MNRAS.186..189M
| url=https://academic.oup.com/mnras/article/186/2/189/993968 | access-date=16 January 2023| url-access=subscription }}
| last1=Renson | first1=P. | last2=Manfroid | first2=J.
| title=Catalogue of Ap, HgMn and Am stars | journal=Astronomy and Astrophysics
| date=May 2009 | volume=498 | issue=3 | pages=961–966
| doi=10.1051/0004-6361/200810788 | bibcode=2009A&A...498..961R
| url=https://www.aanda.org/articles/aa/pdf/2009/18/aa10788-08.pdf | access-date=16 January 2023}}
| last1=Aurière | first1=M. | last2=Wade | first2=G. A. | last3=Lignières | first3=F.
| last4=Hui-Bon-Hoa | first4=A. | last5=Landstreet | first5=J. D. | last6=Iliev
| first6=I. Kh. | last7=Donati | first7=J. F. | last8=Petit | first8=P.
| last9=Roudier | first9=T. | last10=Théado | first10=S.
| title=No detection of large-scale magnetic fields at the surfaces of Am and HgMn stars
| journal=Astronomy and Astrophysics | date=November 2010 | volume=523
| pages=A40 | doi=10.1051/0004-6361/201014848 | arxiv=1008.3086 | bibcode=2010A&A...523A..40A
| s2cid=118643022 | url=https://www.aanda.org/articles/aa/pdf/2010/15/aa14848-10.pdf | access-date=16 January 2023}}
}}
{{Stars of Virgo}}
{{DEFAULTSORT:32 Virginis}}
Category:Delta Scuti variables
Category:Virgo (constellation)