HD 97413 is a binary star located in the southern constellation Centaurus. The system has a combined magnitude of 6.27,[2] placing it near the limit for naked eye visibility. Based on parallax measurements from the Gaia spacecraft, the system is located 320 light years away from the Solar System.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 12m 10.18976s[1] |
| Declination | −46° 16′ 00.3202″[1] |
| Apparent magnitude (V) | 6.27±0.01[2] |
| Characteristics | |
| Spectral type | A1 V[3] |
| U−B color index | +0.04[4] |
| B−V color index | +0.15[4] |
| Astrometry | |
| Proper motion (μ) | RA: −46.711 mas/yr[1] Dec.: +9.593 mas/yr[1] |
| Parallax (π) | 10.1866 ± 0.155 mas[1] |
| Distance | 320 ± 5 ly (98 ± 1 pc) |
| Absolute magnitude (MV) | +1.5[5] |
| Details | |
| A | |
| Mass | 1.94±0.11[6] M☉ |
| Radius | 2.18+0.05 −0.08[7] R☉ |
| Luminosity | 19.6[8] L☉ |
| Surface gravity (log g) | 4.07±0.05[6] cgs |
| Temperature | 7,800[8] K |
| Metallicity [Fe/H] | −0.29[9] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
The objects binarity was detected in a Hipparcos survey. The two components can't be distinguished because both stars have an angular separation of 0.01″.[11] Nevertheless, speckle interferometry revealed the components to have a 2.6 magnitude difference.[12] They are located along a position angle of 250°.[11]
The visible component – HD 97413 A – has a stellar classification of A1 V, indicating that it is an ordinary A-type main-sequence star. It has 1.94 times the mass of the Sun[6] and a radius of 2.18 R☉.[7] It radiates 19.6 times the luminosity of the Sun[8] from its photosphere at an effective temperature of 7,800 K,[8] giving it a white hue. However, this is not typical for an A1 star. Parameters determined by Gaia's extinction reveal HD 97413 A to have an iron abundance half of the Sun's,[9] making it metal deficient.
References
edit- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- ^ Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Bibcode:1978mcts.book.....H.
- ^ a b Slawson, Robert W.; Hill, Robert J.; Landstreet, John D. (September 1992). "A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association". The Astrophysical Journal Supplement Series. 82: 117. Bibcode:1992ApJS...82..117S. doi:10.1086/191711. eISSN 1538-4365. ISSN 0067-0049.
- ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ a b c Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. ISSN 0004-6361.
- ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881.
- ^ a b c d McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. eISSN 1365-2966. ISSN 0035-8711.
- ^ a b Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361.
- ^ "HD 97413". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 10, 2022.
- ^ a b Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.
- ^ Tokovinin, Andrei; Mason, Brian D.; Mendez, Rene A.; Horch, Elliott P.; Briceño, Cesar (8 July 2019). "Speckle Interferometry at SOAR in 2018". The Astronomical Journal. 158 (1): 48. arXiv:1905.10436. Bibcode:2019AJ....158...48T. doi:10.3847/1538-3881/ab24e4. eISSN 1538-3881.