From Wikipedia, the free encyclopedia
Star in the constellation Virgo
Sigma Virginis (σ Vir, σ Virginis) is a
star in the
zodiac
constellation of
Virgo . It can be faintly seen with the naked eye with a baseline
apparent visual magnitude of 4.86.
[2] Based upon
parallax measurements, the distance to this star is roughly 680
light-years .
A
light curve for Sigma Virginis, plotted from
Hipparcos data
[9]
This is an evolved
red giant star with a
stellar classification of M1 III.
[3] It is a suspected
variable star with a brightness that ranges from magnitude +4.77 to +4.86.
[4] This variation has pulsation periods of 23.4, 24.3, 27.9 and 34.1 days.
[3] The
effective temperature of the
stellar atmosphere is around 3,800 K, and it shines with 1,734 times the
luminosity of the Sun .
[7]
References
^
a
b
c
d
e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664,
arXiv :
0708.1752 ,
Bibcode :
2007A&A...474..653V ,
doi :
10.1051/0004-6361:20078357 ,
S2CID
18759600 .
^
a
b
c
d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data ,
SIMBAD ,
Bibcode :
1986EgUBV........0M .
^
a
b
c Tabur, V.; Bedding, T. R. (2009), "Long-term photometry and periods for 261 nearby pulsating M giants",
Monthly Notices of the Royal Astronomical Society , 400 (4): 1945–61,
arXiv :
0908.3228 ,
Bibcode :
2009MNRAS.400.1945T ,
doi :
10.1111/j.1365-2966.2009.15588.x ,
S2CID
15358380 .
^
a
b Kukarkin, B. V.; et al. (1981), "Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (Catalogue of suspected variable stars)", Nachrichtenblatt der Vereinigung der Sternfreunde , Moscow: Academy of Sciences USSR Shternberg,
Bibcode :
1981NVS...C......0K .
^ Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics , 430 : 165–186,
arXiv :
astro-ph/0409579 ,
Bibcode :
2005A&A...430..165F ,
doi :
10.1051/0004-6361:20041272 ,
S2CID
17804304 .
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331,
arXiv :
1108.4971 ,
Bibcode :
2012AstL...38..331A ,
doi :
10.1134/S1063773712050015 ,
S2CID
119257644 .
^
a
b
c
d
e McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017), "Fundamental parameters and infrared excesses of Tycho-Gaia stars", Monthly Notices of the Royal Astronomical Society , 471 (1): 770,
arXiv :
1706.02208 ,
Bibcode :
2017MNRAS.471..770M ,
doi :
10.1093/mnras/stx1433 ,
S2CID
73594365 .
^
"sig Vir" ,
SIMBAD ,
Centre de données astronomiques de Strasbourg , retrieved 2016-09-16 .
^
"/ftp/cats/more/HIP/cdroms/cats" , Centre de Données astronomiques de Strasbourg , Strasbourg astronomical Data Center, retrieved 15 October 2022 .