AE Pictoris

AE Pictoris is an eclipsing binary[5] star system in the southern constellation of Pictor. This dim, blue-white hued point of light is just barely visible to the naked eye; it has an apparent visual magnitude of 6.09, which drops to magnitude 6.14 during an eclipse.[10] The system is located around 1,430 light years away from the Sun based on parallax,[1] and it is receding with a radial velocity of 34 km/s.[11]

AE Pictoris
Observation data
Epoch J2000      Equinox J2000
Constellation Pictor
Right ascension  06h 31m 10.63900s[1]
Declination −61° 52′ 46.3515″[1]
Apparent magnitude (V) 6.14[2]
Characteristics
Spectral type B3V[3]
B−V color index −0.147±0.006[4]
Variable type Eclipsing binary[5]
Astrometry
Radial velocity (Rv)34.0±7.4[4] km/s
Proper motion (μ) RA: −9.142[1] mas/yr
Dec.: +12.087[1] mas/yr
Parallax (π)2.2770 ± 0.0678[1] mas
Distance1,430 ± 40 ly
(440 ± 10 pc)
Absolute magnitude (MV)1.73[4]
Orbit[6]
Period (P)2.9723 d
Eccentricity (e)0.10
Periastron epoch (T)2,431,998.871 JD
Argument of periastron (ω)
(secondary)		39.0°
Semi-amplitude (K1)
(primary)		119.0 km/s
Details
Mass7.1±0.1[7] M☉
Luminosity (bolometric)2,569[8] L☉
Temperature18,700[8] K
Age27.7±1.4[7] Myr
Other designations
AE Pic, CD−61°1394, HD 46792, HIP 31068, HR 2410, SAO 249572[9]
Database references
SIMBADdata

This is a single-lined spectroscopic binary system with an orbital period of 2.97 days and an eccentricity of 0.10. The minimum value of the semimajor axis for the pair is 4.8 Gm (6.9 R☉).[6] It is classed as a probable eclipsing binary variable (EB:), but with some uncertainty regarding the specific type.[5] This is a candidate runaway star system, having a peculiar velocity of 24.9+4.9
−5.1 km/s relative to its neighbors.[7] The visible component is a B-type main-sequence star with a stellar classification of B3V.[3] it is 28 million years old with seven[7] times the mass of the Sun. The star is radiating 2,569 times the luminosity of the Sun from its photosphere at an effective temperature of 18,700 K.[8]

References
  1. 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. Gaia DR2 record for this source at VizieR.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27, Bibcode:2000A&A...355L..27H.
  3. Hiltner, W. A.; et al. (July 1969), "MK Spectral Types for Bright Southern OB Stars", Astrophysical Journal, 157: 313–326, Bibcode:1969ApJ...157..313H, doi:10.1086/150069.
  4. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  5. Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085.
  6. Sahade, J.; Landi Dessy, J. (January 1950), "The Spectroscopic Binary CPD -61°669", Astrophysical Journal, 111: 191, Bibcode:1950ApJ...111..191S, doi:10.1086/145251.
  7. Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x.
  8. Hohle, M. M.; et al. (2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355.
  9. "AE Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-03.
  10. Avvakumova, E. A.; et al. (October 2013), "Eclipsing variables: Catalogue and classification", Astronomische Nachrichten, 334 (8): 860, Bibcode:2013AN....334..860A, doi:10.1002/asna.201311942, hdl:10995/27061.
  11. Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication, Bibcode:1953GCRV..C......0W.
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