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Star in the constellation Auriga From Wikipedia, the free encyclopedia
AE Aurigae (abbreviated as AE Aur) is a runaway star in the constellation Auriga; it lights the Flaming Star Nebula.
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 16m 18.15000s[1] |
| Declination | +34° 18′ 44.3455″[1] |
| Apparent magnitude (V) | 5.96[2] (5.78 - 6.08[3]) |
| Characteristics | |
| Spectral type | O9.5V[4] |
| U−B color index | −0.70[2] |
| B−V color index | +0.22[2] |
| Variable type | Orion variable[3] |
| Astrometry | |
| Radial velocity (Rv) | 56.70±0.6[5] km/s |
| Proper motion (μ) | RA: -4.440[6] mas/yr Dec.: 43.368[6] mas/yr |
| Parallax (π) | 2.4642 ± 0.0660 mas[6] |
| Distance | 1,363±79 ly (418±24 pc)[7] |
| Details[7] | |
| Mass | 19.2±0.3 M☉ |
| Radius | 6.8±0.5 R☉ |
| Luminosity | 50,100+4,800 −4,400 L☉ |
| Surface gravity (log g) | 4.06±0.05 cgs |
| Temperature | 33,200±300 K |
| Rotational velocity (v sin i) | 9±2 km/s |
| Age | 3.98+0.81 −0.70 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
AE Aurigae is a blue O-type main sequence star with a mean apparent magnitude of +6.0. It is classified as an Orion type variable star and its brightness varies irregularly between magnitudes +5.78 and +6.08. It is approximately 1,300 light-years from Earth.
AE Aur is a runaway star that might have been ejected during a collision of two binary star groups. This collision, which also is credited with ejecting Mu Columbae and possibly 53 Arietis, has been traced to the Trapezium cluster in the Orion Nebula two million years ago. The binary Iota Orionis may have been the other half of this collision.[9]
AE Aur is seen to light up the Flaming Star nebula, but it was not formed within it. Instead it is passing through the nebula at high speed and producing a violent bow shock and high energy electromagnetic radiation.[10][11]
Possibly due to its runaway star nature, AE Aurigae has no physical companion stars, although some nearby stars have been erroneously identified as ones. A theoretical companion 1000 AU (0.016 light-years) away from AE Aurigae would have an angular separation of less than 2.5 arcseconds and would probably be lost in the star's glare.[citation needed]
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