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AE Pictoris

From Wikipedia, the free encyclopedia
AE Pictoris

A light curve for AE Pictoris, adapted from Pedersen et al. (2019)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Pictor
Right ascension 06h 31m 10.63900s[2]
Declination −61° 52′ 46.3515″[2]
Apparent magnitude (V) 6.14[3]
Characteristics
Spectral type B3V[4]
B−V color index −0.147±0.006[5]
Variable type Eclipsing binary[6]
Astrometry
Radial velocity (Rv)34.0±7.4[5] km/s
Proper motion (μ) RA: −9.142[2] mas/yr
Dec.: +12.087[2] mas/yr
Parallax (π)2.2770 ± 0.0678 mas[2]
Distance1,430 ± 40 ly
(440 ± 10 pc)
Absolute magnitude (MV)1.73[5]
Orbit[7]
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
AE Pic A
Mass7.1±0.1[8] M☉
Luminosity (bolometric)2,569[9] L☉
Temperature17,873[10] K
Metallicity [Fe/H]3.93[10] dex
Rotation1.490911 d[11]
Rotational velocity (v sin i)70[10] km/s
Age27.7±1.4[8] Myr
AE Pic B
Temperature11,699[10] K
Metallicity [Fe/H]4.02[10] dex
Rotational velocity (v sin i)42[10] km/s
Other designations
AE Pic, CD−61°1394, HD 46792, HIP 31068, HR 2410, SAO 249572[12]
Database references
SIMBADdata

AE Pictoris is an eclipsing binary[6] 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.[13] The system is located around 1,430 light years away from the Sun based on parallax,[2] and it is receding with a radial velocity of 34 km/s.[14]

This is a 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☉).[7] The secondary star was only recently (in 2023) detected, making it a double-lined spectroscopic binary.[10] It is classed as a probable eclipsing binary variable (EB:), but with some uncertainty regarding the specific type.[6] This is a candidate runaway star system, having a peculiar velocity of 24.9+4.9
−5.1 km/s relative to its neighbors.[8] The visible component is a B-type main-sequence star with a stellar classification of B3V.[4] it is 28 million years old with seven[8] 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.[9]

References

[edit]
  1. ^ Pedersen, May G.; Chowdhury, Sowgata; Johnston, Cole; Bowman, Dominic M.; Aerts, Conny; Handler, Gerald; De Cat, Peter; Neiner, Coralie; David-Uraz, Alexandre; Buzasi, Derek; Tkachenko, Andrew; Simón-Díaz, Sergio; Moravveji, Ehsan; Sikora, James; Mirouh, Giovanni M.; Lovekin, Catherine C.; Cantiello, Matteo; Daszyńska-Daszkiewicz, Jadwiga; Pigulski, Andrzej; Vanderspek, Roland K.; Ricker, George R. (February 2019). "Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample". The Astrophysical Journal Letters. 872 (1): L9. arXiv:1901.07576. Bibcode:2019ApJ...872L...9P. doi:10.3847/2041-8213/ab01e1.
  2. ^ a b c d e f 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.
  3. ^ 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.
  4. ^ a b 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.
  5. ^ a b c 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, S2CID 119257644.
  6. ^ a b c 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, S2CID 125853869.
  7. ^ a b 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.
  8. ^ a b c d 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, S2CID 118629873.
  9. ^ a b 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, S2CID 111387483.
  10. ^ a b c d e f g Kovalev, Mikhail; Straumit, Ilya (2023). "Application of the binary spectral model to high-resolution spectra. First estimation of the fundamental parameters for HD 20784". Monthly Notices of the Royal Astronomical Society. 523 (3): 3741–3748. arXiv:2210.00863. Bibcode:2023MNRAS.523.3741K. doi:10.1093/mnras/stad1667.
  11. ^ Barraza, L. F.; Gomes, R. L.; Messias, Y. S.; Leão, I. C.; Almeida, L. A.; Janot-Pacheco, E.; Brito, A. C.; Brito, F. A. C.; Santana, J. V.; Gonçalves, N. S.; Das Chagas, M. L.; Teixeira, M. A.; De Medeiros, J. R.; Canto Martins, B. L. (2022). "Rotation Signature of TESS B-type Stars. A Comprehensive Analysis". The Astrophysical Journal. 924 (2): 117. arXiv:2202.01022. Bibcode:2022ApJ...924..117B. doi:10.3847/1538-4357/ac3335. S2CID 246030494.
  12. ^ "AE Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-03.
  13. ^ 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.
  14. ^ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication, Bibcode:1953GCRV..C......0W.
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