<templatestyles src="Template:Sky/styles.css" />Coordinates: Sky map 13h 49m 51.95s, −13° 13′ 37.5″

QS Virginis

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Template:Short description

QS Virginis
File:QSVirLightCurve.png
Visual band light curves for QS Virginis, adapted from O’Donoghue et al. (2003).[1] The lowest plot shows two pre-eclipse dips.
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) +14.8
Characteristics
Spectral type DAm / M3.5V
Astrometry
Proper motion (μ) RA: Script error: No such module "val".[2] mas/yr
Dec.: Script error: No such module "val".[2] mas/yr
Parallax (π)19.9632±0.0584 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)11.74 + 11.82[1]
Orbit
Period (P)217.092 min[1]
Semi-major axis (a)0.0056 AU
Eccentricity (e)0.0
Inclination (i)60[1]°
Details[1]
White dwarf
Mass0.78 Template:Solar mass
Radius0.011 Template:Solar radius
Luminosity0.0044[3] Template:Solar luminosity
Surface gravity (log g)8.34 cgs
Temperature14,200 K
Rotational velocity (v sin i)400 km/s
Red dwarf
Mass0.43 Template:Solar mass
Radius0.42 Template:Solar radius
Luminosity0.015[3] Template:Solar luminosity
Temperature3,100 K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Rotational velocity (v sin i)140 km/s
Other designations
GSC 05559-00143, 1RXS J134951.0-131338, WD 1347-129, EC 13471-1258, SBC9 1944[4]
Database references
SIMBADdata

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QS Virginis (abbreviated QS Vir) is an eclipsing binary system approximately 163 light-years away from the Sun,[1][2] forming a cataclysmic variable. The system comprises an eclipsing white dwarf and red dwarf that orbit each other every 3.62 hours.[1]

Variability

The eclipsing binary nature of QS Virginis was discovered in 1997 during the Edinburgh-Cape Blue Object Survey for blue stellar objects in the southern hemisphere.[5]

Possible third body

In 2009 the discovery of an extrasolar planet in orbit around the binary star was announced, detected by variations in the timings of the eclipses of the two stars.[6] The planet was announced to have a minimum mass 6.4 times the mass of Jupiter, in an elliptical orbit 4.2 Astronomical Units away from binary.

Subsequent observations revealed that the timings were not following the pattern predicted by the planetary model. While the observed variations in eclipse times may be caused by a third body, the best fit model orbit is for an object with minimum mass 0.05 solar masses (about 50 times the mass of Jupiter) in a highly eccentric 14-year orbit.[7]

See also

References

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  1. ↑ a b c d e f g Script error: No such module "Citation/CS1".
  2. ↑ a b c d e f Template:Cite DR2
  3. ↑ a b Calculated from the effective temperature and radius
  4. ↑ Template:Cite simbad
  5. ↑ Script error: No such module "Citation/CS1".
  6. ↑ Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "Citation/CS1".

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Template:Stars of Virgo

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