WW Aurigae

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Template:Short description

WW Aurigae
File:WWAurLightCurve.png
A light curve for WW Aurigae, plotted from Hiparcos data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.82[3]
Characteristics
Spectral type A4m + A5m[4]
B−V Template:Engvar Template:Val[3]
Variable type EA[5]
Astrometry
Radial velocity (Rv)Template:Val[3] km/s
Proper motion (μ) RA: −26.3507[2] mas/yr
Dec.: −17.343[2] mas/yr
Parallax (π)11.1431±0.0691 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.29[3]
Orbit[6]
Period (P)2.525 d
Eccentricity (e)0.00
Periastron epoch (T)Template:Val
Argument of periastron (ω)
(secondary)		0.00°
Semi-amplitude (K1)
(primary)		115.6 km/s
Semi-amplitude (K2)
(secondary)		127.7 km/s
Details[7]
WW Aur A
MassTemplate:Val Template:Solar mass
RadiusTemplate:Val Template:Solar radius
Luminosity13.5[8] Template:Solar luminosity
Surface gravity (log g)Template:Val cgs
TemperatureTemplate:Val K
Rotational velocity (v sin i)Template:Val km/s
AgeTemplate:Val Myr
WW Aur B
MassTemplate:Val Template:Solar mass
RadiusTemplate:Val Template:Solar radius
Luminosity10.5[8] Template:Solar luminosity
Surface gravity (log g)Template:Val cgs
TemperatureTemplate:Val K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Rotational velocity (v sin i)Template:Val[7] km/s
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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WW Aurigae is an eclipsing binary star system in the northern constellation of Auriga. It has a combined maximum apparent visual magnitude of 5.86,[5] which is bright enough to be dimly visible to the naked eye. Based upon an annual parallax shift of Template:Val,[2] it is located 293 light years from the Earth. The system is moving further away with a heliocentric radial velocity of −9 km/s, having come to within Template:Convert some 3.12 million years ago.[3]

This is a double-lined[4] spectroscopic binary system, having a circular orbit with a period of 2.5 days.[6] It was discovered to be variable independently by Friedrich Schwab[10] and Heinrich Van Solowiew in 1918.[11] It was given its variable star designation in 1919.[12] Both components are metallic-lined, or Am stars, with a spectrum showing a deficiency of calcium and scandium, and an overabundance of heavier elements.[13] Together they form an EA, or Algol-type, eclipsing binary with the primary occultation reducing the net magnitude to a minimum of 6.54 and the secondary eclipse lowering it to 6.43, over a cycle time of 2.52501936 days.[5]

References

Template:Reflist

External links

Template:Stars of Auriga

  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named HipDataAccess
  2. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named dr3
  3. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  4. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named SreedharRao1991
  5. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named gcvs
  6. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Kitamura1976
  7. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Southworth2004
  8. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Southworth2015
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Schwab1918
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Dugan1930
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Hartwig1919
  13. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Pavlovski2008
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