AE Aurigae

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AE Aurigae
Auriga constellation map.svg
Red circle.svg
Location of AE Aur (circled)
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 1,320 ± 40  ly
(410 ± 10  pc)
Details [7]
Mass 23  M☉
Radius 7.47  R☉
Luminosity 59,000  L☉
Surface gravity (log g)4.0  cgs
Temperature 33,000  K
Rotational velocity (v sin i)25 [7]  km/s
Other designations
AG+34°542, BD+34°980, GC  6429, HD  34078, HIP  24575, HR  1712, SAO  57816, ADS  3843, CCDM J05163+3419, WDS J05163+3419, GCRV  3123, IRAS 05130+3415
Database references
SIMBAD data

AE Aurigae (abbreviated as AE Aur) is a runaway star in the constellation Auriga; it lights the Flaming Star Nebula.

Contents

Description

Hipparcos light curves for AE Aurigae. The main plot shows the long-term variation, and the inset plot shows the variation folded over a period of 213.7 days. Adapted from Marchenko et al. (1998) AEAurLightCurve.png
Hipparcos light curves for AE Aurigae. The main plot shows the long-term variation, and the inset plot shows the variation folded over a period of 213.7 days. Adapted from Marchenko et al. (1998)

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]

Nebula IC 405 around AE Aurigae IC405 Flaming Star Nebula from the Mount Lemmon SkyCenter Schulman Telescope courtesy Adam Block.jpg
Nebula IC 405 around AE Aurigae

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]

Companions

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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References

  1. 1 2 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600.
  2. 1 2 3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. 1 2 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  4. ↑ Sota, A.; Maíz Apellániz, J.; Walborn, N. R.; Alfaro, E. J.; Barbá, R. H.; Morrell, N. I.; Gamen, R. C.; Arias, J. I. (2011). "The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-violet at R ~ 2500". The Astrophysical Journal Supplement. 193 (2): 24. arXiv: 1101.4002 . Bibcode:2011ApJS..193...24S. doi:10.1088/0067-0049/193/2/24. S2CID   119248206.
  5. ↑ Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv: 0705.0878 . Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID   119323941.
  6. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 .
  7. 1 2 Martins, F.; Hervé, A.; Bouret, J.-C.; Marcolino, W.; Wade, G. A.; Neiner, C.; Alecian, E.; Grunhut, J.; Petit, V. (2015). "The MiMeS survey of magnetism in massive stars: CNO surface abundances of Galactic O stars". Astronomy & Astrophysics. 575: A34. arXiv: 1411.4420 . Bibcode:2015A&A...575A..34M. doi:10.1051/0004-6361/201425173. S2CID   119258285.
  8. ↑ Marchenko, S. V.; Moffat, A. F. J.; van der Hucht, K. A.; Seggewiss, W.; Schrijver, H.; Stenholm, B.; Lundström, I.; Setia Gunawan, D. Y. A.; Sutantyo, W.; van den Heuvel, E. P. J.; De Cuyper, J. P.; Gómez, A. E. (March 1998). "Wolf-Rayet stars and O-star runaways with HIPPARCOS II. Photometry". Astronomy & Astrophysics. 331: 1022–1036. Bibcode:1998A&A...331.1022M . Retrieved 29 October 2021.
  9. ↑ Hoogerwerf, R.; De Bruijne, J. H. J.; De Zeeuw, P. T. (2001). "On the origin of the O and B-type stars with high velocities. II. Runaway stars and pulsars ejected from the nearby young stellar groups". Astronomy and Astrophysics. 365 (2): 49. arXiv: astro-ph/0010057 . Bibcode:2001A&A...365...49H. doi:10.1051/0004-6361:20000014. S2CID   18970167.
  10. ↑ López-Santiago, J.; Miceli, M.; Del Valle, M. V.; Romero, G. E.; Bonito, R.; Albacete-Colombo, J. F.; Pereira, V.; De Castro, E.; Damiani, F. (2012). "AE Aurigae: First Detection of Non-thermal X-Ray Emission from a Bow Shock Produced by a Runaway Star". The Astrophysical Journal Letters. 757 (1): L6. arXiv: 1208.6511 . Bibcode:2012ApJ...757L...6L. doi:10.1088/2041-8205/757/1/L6. S2CID   37792833.
  11. ↑ France, Kevin; McCandliss, Stephan R.; Lupu, Roxana E. (2007). "A Cometary Bow Shock and Mid-Infrared Emission Variations Revealed in Spitzer Observations of HD 34078 and IC 405". The Astrophysical Journal. 655 (2): 920–939. arXiv: astro-ph/0610953 . Bibcode:2007ApJ...655..920F. doi:10.1086/510481. S2CID   16963366.
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