 A light curve for BF Antliae, plotted from TESS data | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Antlia |
| Right ascension | 09 56 54.09215 |
| Declination | −27° 28′ 30.5575″ |
| Apparent magnitude (V) | 6.32 (+0.01) |
| Characteristics | |
| Spectral type | A4 V |
| B−V color index | 0.173±0.008 |
| Variable type | δ Sct |
| Astrometry | |
| Radial velocity (Rv) | +18.2±0.8 km/s |
| Proper motion (μ) | RA: −72.627 mas/yr Dec.: +23.234 mas/yr |
| Parallax (π) | 6.8977 ± 0.0578 mas |
| Distance | 473 ± 4 ly (145 ± 1 pc) |
| Absolute magnitude (MV) | 0.33 |
| Details | |
| Mass | 2.41±0.05 M☉ |
| Luminosity | 66.8+11.7 −10.0 L☉ |
| Temperature | 7,745+53 −71 K |
| Rotational velocity (v sin i) | 218.9±1.7 km/s |
| Other designations | |
| BF Ant, CD−26° 7551, HD 86301, HIP 48776, HR 3933, SAO 178216 | |
| Database references | |
| SIMBAD | data |
BF Antliae, or HD 86301, is a variable star in the southern constellation of Antlia. It has a baseline apparent visual magnitude of 6.32, which indicates it lies near the lower limit of naked eye visibility for faint stars. The distance to BF Ant, as determined from its annual parallax shift of 6.9 mas, is 473 light years. It is moving further away with a heliocentric radial velocity of +18 km/s.
In 2002, Gerald Handler and Robert R. Shobbrook discovered that the brightness of the star varies. It was given its variable star designation, BF Antliae, in 2006. It is an A-type main-sequence star with a stellar classification of A4 V that is at the end of its main sequence lifespan. It is a Delta Scuti variable that varies by 0.01 of a magnitude. These are short-period (six hours at most) pulsating stars that have been used as standard candles and as subjects to study astroseismology. Handler and Shobbrook noted that the star lies near the "hot luminous border of the δ Scuti instability strip", and it appears "multiperiodic with a time scale of 3.8–6 hours".
BF Antliae is spinning rapidly with a projected rotational velocity of 219 km/s. It has 2.41 times the mass of the Sun and is radiating 67 times the Sun's luminosity from its photosphere at an effective temperature of 7,745 K.
References
- "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ 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.
- ^ Chang, S.-W.; et al. (2013), "Statistical Properties of Galactic δ Scuti Stars: Revisited", The Astronomical Journal, 145 (5): 10, arXiv:1303.1031, Bibcode:2013AJ....145..132C, doi:10.1088/0004-6256/145/5/132, S2CID 118900730, 132.
- ^ 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.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789, A120.
- ^ Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics, 531: A143, arXiv:1012.4858, Bibcode:2011A&A...531A.143D, doi:10.1051/0004-6361/201016386, S2CID 119286673.
- "BF Ant". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 19, 2018.
- ^ Handler, G.; Shobbrook, R. R. (June 2002), "On the relationship between the Delta Scuti and Gamma Doradus pulsators", Monthly Notices of the Royal Astronomical Society, 333 (2): 251–262, arXiv:astro-ph/0202152, Bibcode:2002MNRAS.333..251H, doi:10.1046/j.1365-8711.2002.05401.x, S2CID 119062757.
- Kazarovets, E, V; Samus, N. N.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (August 2006). "The 78th Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 5721: 1. Bibcode:2006IBVS.5721....1K. Retrieved 13 November 2024.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Templeton, Matthew (16 July 2010). "Delta Scuti and the Delta Scuti Variables". Variable Star of the Season. AAVSO (American Association of Variable Star Observers). Retrieved 5 September 2015.
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