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- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "AE Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-03.
- ^ 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.
- ^ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication, Bibcode:1953GCRV..C......0W.