HD 15524
(Redirected from HR 728)
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 30m 32.3544s[1] |
| Declination | +25° 14′ 06.107″[1] |
| Apparent magnitude (V) | 5.90[2] (5.97 / 10.4)[3] |
| Characteristics | |
| HD 15524 A | |
| Spectral type | F6 IV[4] or F4 V[5] |
| B−V color index | 0.412±0.006[6] |
| Astrometry | |
| Radial velocity (Rv) | −9.60±1.5[7] km/s |
| Proper motion (μ) | RA: +62.407±0.027[1] mas/yr Dec.: −75.827±0.026[1] mas/yr |
| Parallax (π) | 19.32 ± 0.44 mas[8] |
| Distance | 169 ± 4 ly (52 ± 1 pc) |
| Absolute magnitude (MV) | 2.44[6] |
| Details | |
| HD 15524 A | |
| Mass | 1.31[9] M☉ |
| Luminosity | 10.01[10] L☉ |
| Surface gravity (log g) | 3.92±0.14[9] cgs |
| Temperature | 6,665±227[9] K |
| Metallicity [Fe/H] | 0.11±0.05[11] dex |
| Rotational velocity (v sin i) | 59.8±3.0[6] km/s |
| Age | 1.633[9] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 15524 is a wide binary star[3] in the northern zodiac constellation of Aries. Located approximately 51.76 parsecs (168.8 ly) away,[8] the primary, a yellow-white subgiant[4] or main sequence[5] star has an apparent magnitude of 5.97, meaning that it can be viewed with the naked eye under good conditions. The secondary, separated from the primary by 12.4 arcseconds, has an apparent magnitude of 10.4.[3]
This system is the likely source of X-ray emission coming from these coordinates.[12]
References
[edit]- ^ a b c d Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.
- ^ a b "HD 15524". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-26.
- ^ a b c Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ^ a b Harlan, E. A. (September 1969). "Mk classifications for F and G-type stars". Astronomical Journal. 74: 916. Bibcode:1969AJ.....74..916H. doi:10.1086/110881.
- ^ a b Abt, H. A (1985). "Visual multiples. VIII - 1000 MK types". Astrophysical Journal Supplement Series. 59: 95. Bibcode:1985ApJS...59...95A. doi:10.1086/191064.
- ^ a b c Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
- ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- ^ a b c d 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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ 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.
- ^ Ramírez, I.; et al. (September 2012), "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets", The Astrophysical Journal, 756 (1): 46, arXiv:1207.0499, Bibcode:2012ApJ...756...46R, doi:10.1088/0004-637X/756/1/46, S2CID 119199829.
- ^ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009). "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources". The Astrophysical Journal Supplement. 184 (1): 138–151. arXiv:0910.3229. Bibcode:2009ApJS..184..138H. doi:10.1088/0067-0049/184/1/138. S2CID 119267456.
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