DT Vir, BD+13° 2618, GJ 494, HIP 63510, LHS 2665, LTT 13752, Ross 458, Wolf 462[10]
Database references
SIMBAD
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ARICNS
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DT Virginis, also known as Ross 458, is a binary star system in the constellation of Virgo. It has an apparent visual magnitude of 9.79[2] and is located at a distance of 37.6 light-years from the Sun. Both of the stars are low-mass red dwarfs with at least one of them being a flare star. This binary system has a circumbinary sub-stellar companion.
A light curve for DT Virginis. The main plot, adapted from Shakhovskaya (1969),[11] shows the intensity of a flare relative to the star's quiescent intensity. The inset plot, adapted from Kiraga (2012),[12] shows the periodic variation.
This star was mentioned as a suspected variable by M. Petit in 1957.[13] In 1960, O. J. Eggen classified it as a member of the Hyades moving group based on the system's space motion;[14] it is now considered a likely member of the Carina Near Moving Group.[5] Two flares were reported from this star in 1969 by N. I. Shakhovskaya, confirming it as a flare star.[11] It was identified as an astrometric binary in 1994 by W. D. Heintz, who found a period of 14.5 years.[4] The pair were resolved using adaptive optics in 1999.[4] Early mass estimates placed the companion near the substellar limit, and it was initially proposed as a brown dwarf[15] but is now considered late-type red dwarf.[3]
The primary member, component A, is an M-type main-sequence star with a stellar classification of M0.5.[3] It is young, magnetically very active star with a high rate of rotation[15] and strong Hα emission.[3] The star experiences star spots that cover 10–15% of the surface[2] It is smaller and less massive than the Sun. The star is radiating just 4.4%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 3,484 K.[5]
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^ abcdeCite error: The named reference Manjavacas_et_al_2019 was invoked but never defined (see the help page).
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^Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
^Cite error: The named reference Simbad was invoked but never defined (see the help page).
^ abCite error: The named reference Shakhovskaya1969 was invoked but never defined (see the help page).
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^ abCite error: The named reference Beuzit_et_al_2004 was invoked but never defined (see the help page).
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