QS Virginis

Coordinates: Sky map 13h 49m 51.95s, −13° 13′ 37.5″
Source: Wikipedia, the free encyclopedia.
QS Virginis

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 13h 49m 52.0032s[2]
Declination −13° 13′ 37.0019″[2]
Apparent magnitude (V) +14.8
Characteristics
Spectral type DAm / M3.5V
Distance
163.4 ± 0.5 ly
(50.1 ± 0.1 pc)
Absolute magnitude (MV)11.74 + 11.82[1]
Inclination (i)
60[1]°
Details
Rotational velocity
(v sin i)		140 km/s
GSC 05559-00143, 1RXS J134951.0-131338, WD 1347-129, EC 13471-1258, SBC9 1944[4]
Database references
Exoplanet Archive
data

QS Virginis (abbreviated QS Vir) is an

cataclysmic variable. The system comprises an eclipsing white dwarf and red dwarf that orbit each other every 3.37 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.

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

  1. ^
    S2CID 17408072
    .
  2. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  3. ^ a b Calculated from the effective temperature and radius
  4. ^ "QS Vir". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-16.
  5. doi:10.1093/mnras/287.4.867
    .
  6. doi:10.1111/j.1745-3933.2009.00780.x
    .
  7. S2CID 96441672
    .


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