Astronomy:HD 134064
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 15h 07m 20.369s[2] |
| Declination | +18° 26′ 30.57″[2] |
| Apparent magnitude (V) | 6.03[3] |
| Characteristics | |
| Spectral type | A3Vnn[3] |
| U−B color index | +0.06[4] |
| B−V color index | +0.06[4] |
| Astrometry | |
| Radial velocity (Rv) | −7.0[5] km/s |
| Proper motion (μ) | RA: +42.368[2] mas/yr Dec.: −49.682[2] mas/yr |
| Parallax (π) | 13.2096 ± 0.0324[2] mas |
| Distance | 246.9 ± 0.6 ly (75.7 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.74[1] |
| Orbit[6] | |
| Period (P) | 8.0 yr |
| Semi-major axis (a) | 0.10″ |
| Eccentricity (e) | 0.45 |
| Inclination (i) | 122.6° |
| Longitude of the node (Ω) | 41.3° |
| Periastron epoch (T) | B 1939.97 |
| Argument of periastron (ω) (secondary) | 71.4° |
| Details | |
| HD 134064 A | |
| Mass | 2.15[7] M☉ |
| Luminosity | 16[8] L☉ |
| Surface gravity (log g) | 4.25[7] cgs |
| Temperature | 9,732±331[7] K |
| Rotational velocity (v sin i) | 185[7] km/s |
| Age | 160[7] Myr |
| HD 134064 B | |
| Mass | 0.73[9] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 134064 is a triple star system in the northern constellation of Boötes. It is faintly visible to the naked eye with a combined apparent visual magnitude of 6.03.[3] This system is located at a distance of 247 light years from the Sun based on parallax measurements,[2] but is drifting closer with a radial velocity of –7.0 km/s.[5]
HD 134064 can be resolved into two stars 110″ apart. The brighter primary is itself a close binary that has not been resolved into individual stars.
The two inner components of this system are orbiting each other with a period of eight years and a high orbital eccentricity of 0.45.[6] The pair are separated by an orbital distance of around 8,000 astronomical unit|AU.[9] The primary component is a rapidly rotating A-type main sequence star with a stellar classification of A3Vnn.[3] It has 2.15 times the mass of the Sun and is spinning with a projected rotational velocity of 185 km/s.[7] The secondary star has 73% of the Sun's mass.[9] The system is young, with an estimated age of 160 million years.[7]
The fainter resolved component C is magnitude 11.39 and is less massive than the Sun.[11]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 Paunzen, E. et al. (July 2001), "A spectroscopic survey for λ Bootis stars. II. The observational data", Astronomy and Astrophysics 373 (2): 625–632, doi:10.1051/0004-6361:20010630, Bibcode: 2001A&A...373..625P.
- ↑ 4.0 4.1 Osawa, Kiyoteru (July 1959), "Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of a0 V Stars", Astrophysical Journal 130: 159, doi:10.1086/146706, Bibcode: 1959ApJ...130..159O.
- ↑ 5.0 5.1 Kharchenko, N. V. et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten 328 (9): 889–896, doi:10.1002/asna.200710776, Bibcode: 2007AN....328..889K.
- ↑ 6.0 6.1 "Sixth Catalog of Orbits of Visual Binary Stars", United States Naval Observatory, http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6, retrieved 21 May 2017.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ 9.0 9.1 9.2 De Rosa, R. J. et al. (January 2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society 437 (2): 1216–1240, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D.
- ↑ "HD 134064". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+134064.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
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