HD 132563
HD 132563 is a triple star system in the constellation Boötes. The two resolvable components of this system are designated HD 132563A and HD 132563B. The primary star, HD 132563A, is actually a spectroscopic binary with a period of more than 15 years and an orbital eccentricity of greater than 0.65. The smaller member of this tightly orbiting pair has about 55% the mass of the Sun.[5]
Stellar system
[edit]| Aa | |||||||||||||
| Period 47 yr | |||||||||||||
| Ab | |||||||||||||
| Separation 400 AU | |||||||||||||
| B | |||||||||||||
Hierarchy of orbits in the system
HD 132563 can be resolved into two stars with a separation of 4.1″ and magnitudes of 9.0 and 9.5.[6] These two stars have almost identical distances and proper motions and are widely accepted to form a binary system with a separation of about 400 au.[5]
The primary, component A, consists of a star slightly more massive and hotter than the sun and an unseen companion with a mass of about 0.6 M☉. These two stars circle each other in a highly eccentric orbit with separations varying between 2.1 au and 27.5 au[6] Based on evolutionary modelling and isochrone fitting, the primary is right at the end of its main sequence life]] and starting to expand into a subgiant.[5]
Component B is too far from the primary for orbital motion to have been observed, but it is estimated that an orbit would take about 5,000 years. It is main sequence star very similar to the Sun.[5]
A further 9th-magnitude star 65" from the primary is listed as component C in the Washington Double Star Catalog,[10] but is much further away from us than the triple system.[11]
Planetary system
[edit]Based upon radial velocity variations of HD 132563B, the presence of an ordinary giant planet has been inferred by S. Desidera et al. (2011). This object is orbiting the star with a period of 1,544 days, at a distance of about 2.6 AU, and with an orbital eccentricity of 0.22.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.49±0.09 MJ | 2.62±0.04 | 1,544±34 | 0.22±0.09 | — | — |
References
[edit]- ^ a b 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.
- ^ 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 c d e f g h i Desidera, S.; et al. (June 2004). "Abundance difference between components of wide binaries". Astronomy and Astrophysics. 420 (2): 683–697. arXiv:astro-ph/0403051. Bibcode:2004A&A...420..683D. doi:10.1051/0004-6361:20041242. S2CID 56391176.
- ^ 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 c d e f g h i j k l m n o Desidera, S.; et al. (July 5, 2011). "A giant planet in the triple system HD132563". Astronomy & Astrophysics. 533: A90. arXiv:1107.0918. Bibcode:2011A&A...533A..90D. doi:10.1051/0004-6361/201117191. S2CID 54938087.
- ^ a b c d Tokovinin, Andrei (2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5.
- ^ a b c d Stassun, Keivan G.; et al. (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.
- ^ a b Sissa, E.; Gratton, R.; Desidera, S.; Martinez Fiorenzano, A. F.; Bonfanti, A.; Carolo, E.; Vassallo, D.; Claudi, R. U.; Endl, M.; Cosentino, R. (2016). "Hα-activity and ages for stars in the SARG survey". Astronomy and Astrophysics. 596. arXiv:1609.04660. Bibcode:2016A&A...596A..76S. doi:10.1051/0004-6361/201628531.
- ^ "IDS 14548+4427". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2011-07-14.
- ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
- ^ 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.
External links
[edit]- Voisey, Jon (July 14, 2011). "New planet discovered in Trinary star system". PhysOrg. Retrieved 2011-07-14.
