AB Aurigae

AB Aurigae

AB Aurigae and its dust disk.
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 04h 55m 45.8445s
Declination +30° 33′ 04.292″
Apparent magnitude (V) 7.05[1]
Characteristics
Spectral type A0Vpe
U−B color index +0.04[2]
B−V color index +0.11[2]
Variable type Orion
Astrometry
Radial velocity (Rv)8.90 ± 0.9[3] km/s
Proper motion (μ) RA: 2.63[4] mas/yr
Dec.: -24.73[4] mas/yr
Parallax (π)7.18 ± 0.96[4] mas
Distanceapprox. 450 ly
(approx. 140 pc)
Details
Mass2.4[5] M☉
Radius2.5[6] R☉
Luminosity47[5] L☉
Temperature9772[5] K
Other designations
BD+30° 741, HD 31293, HIP 22910, SAO 57506
Database references
SIMBADdata

AB Aurigae is a star in the Auriga constellation. It is known for hosting a dust disk that may harbour a condensing planet or brown dwarf. The star could host a possible substellar companion in wide orbit.

Planetary system

Oppenheimer et al. (2008)[7] observed an annulus feature in AB Aurigae's dust disk between 43 and 302 AU from the star, a region never seen before. An azimuthal gap in an annulus of dust at a radius of 102 AU would suggest the formation of at least one small body at an orbital distance of nearly 100 AU. Such object could turn out either a massive planetary companion or more likely a brown dwarf companion, in both cases located at nearly 100 AU from the bright star. So far the object is unconfirmed.

The AB Aurigae planetary system[7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b (unconfirmed) ≥5–37 MJ 102 ≥800 ? — —


References

  1. ↑ 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.
  2. 1 2 Nicolet, B. (1964). "Catalogue of homogeneous data in the UBV photoelectric photometric system". Astronomy and Astrophysics Supplement Series. 34: 1–49. Bibcode:1978A&AS...34....1N.
  3. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  4. 1 2 3 van Leeuwen, F.; et al. (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.
  5. 1 2 3 Tannirkulam, A.; Monnier, J. D.; Harries, T. J.; Millan‐Gabet, R.; Zhu, Z.; Pedretti, E.; Ireland, M.; Tuthill, P.; Ten Brummelaar, T.; McAlister, H.; Farrington, C.; Goldfinger, P. J.; Sturmann, J.; Sturmann, L.; Turner, N. (2008). "A Tale of Two Herbig Ae Stars, MWC 275 and AB Aurigae: Comprehensive Models for Spectral Energy Distribution and Interferometry". The Astrophysical Journal. 689: 513–531. arXiv:0808.1728. Bibcode:2008ApJ...689..513T. doi:10.1086/592346.
  6. ↑ Li, Dan; Pantin, Eric; Telesco, Charles M.; Zhang, Han; Wright, Christopher M.; Barnes, Peter J.; Packham, Chris; Mariñas, Naibí (2016). "AN ORDERED MAGNETIC FIELD IN THE PROTOPLANETARY DISK OF AB Aur REVEALED BY MID-INFRARED POLARIMETRY". The Astrophysical Journal. 832: 18. arXiv:1609.02493. Bibcode:2016ApJ...832...18L. doi:10.3847/0004-637X/832/1/18.
  7. 1 2 Oppenheimer, Ben R.; et al. (2008). "The Solar-System-Scale Disk around AB Aurigae". The Astrophysical Journal. 679 (2): 1574–1581. arXiv:0803.3629. Bibcode:2008ApJ...679.1574O. doi:10.1086/587778.

Further reading

  • Telleschi, A.; Güdel, M.; Briggs, K. R.; Skinner, S. L.; Audard, M.; Franciosini, E. (2007). "The first high-resolution X-ray spectrum of a Herbig star: AB Aurigae". The Astrophysical Journal. 468 (2): 541–556. arXiv:astro-ph/0610456. Bibcode:2007A&A...468..541T. doi:10.1051/0004-6361:20065422.
  • Oppenheimer, Ben R.; Brenner, Douglas; Hinkley, Sasha; Zimmerman, Neil; Sivaramakrishnan, Anand; Soummer, Remi; et al. (2008). "The Solar-System-Scale Disk around AB Aurigae". The Astrophysical Journal. 679 (2): 1574–1581. arXiv:0803.3629. Bibcode:2008ApJ...679.1574O. doi:10.1086/587778.
  • Bitner, Martin A.; Richter, Matthew J.; Lacy, John H.; Greathouse, Thomas K.; Jaffe, Daniel T.; Blake, Geoffrey A. (2007). "TEXES Observations of Pure Rotational H2 Emission from AB Aurigae". The Astrophysical Journal. 661 (1): L69–L72. arXiv:0704.1481. Bibcode:2007ApJ...661L..69B. doi:10.1086/518717.
  • Fukagawa, Misato; Hayashi, Masahiko; Tamura, Motohide; Itoh, Yoichi; Hayashi, Saeko S.; Oasa, Yumiko; et al. (2004). "Spiral Structure in the Circumstellar Disk around AB Aurigae". The Astrophysical Journal. 605 (1): L53–L56. Bibcode:2004ApJ...605L..53F. doi:10.1086/420699.
  • L. P. Keller; S. Hony; J. P. Bradley; F. J. Molster; L. B. F. M. Waters; J. Bouwman; et al. (2002). "Identification of iron sulphide grains in protoplanetary disks". Nature. 417 (6885): 148–150. Bibcode:2002Natur.417..148K. doi:10.1038/417148a. PMID 12000914.
  • Overbye, Dennis (2008-03-26). "Star's Dust May Hold Clue to New Planet". www.nytimes.com. Archived from the original on December 10, 2008. Retrieved 2008-08-20.
  • "Image AB Aurigae". SIMBAD. Retrieved 2008-08-20.
  • "AB Aurigae: How To Make Planets". NASA. Archived from the original on 29 September 2008. Retrieved 2008-08-20.
  • "AB Aurigae". jumk.de. Retrieved 2008-10-15.
  • "Planet in Progress? Evidence Of A Huge Planet Forming In Star System". Science News. Archived from the original on 10 October 2008. Retrieved 2008-10-15.
  • "Spiral Dance in a Planetary Nursery". Subaru Telescope. Retrieved 2008-10-15.
  • "The Source of Stelar Magnetism". news.softpedia.com. Retrieved 2008-10-16.
  • "XMM-Newton unlocks magnetic mystery". iTWire. Retrieved 2008-10-16.
  • "Silicate Stardust in Meteorites". Planetary science research. Retrieved 2008-10-16.
  • "Image Multimidea Gallary ESA". ESA. Retrieved 2008-10-16.


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