T Persei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 2h 19m 21.87884s[1] |
| Declination | +58° 57′ 40.3271″[1] |
| Apparent magnitude (V) | 8.34-9.70[2] |
| Characteristics | |
| Spectral type | M2Iab[3] |
| U−B color index | +2.62[4] |
| B−V color index | +2.33[4] |
| Variable type | SRc[2] |
| Astrometry | |
| Radial velocity (Rv) | −40.85[5] km/s |
| Proper motion (μ) | RA: 0.31[1] mas/yr Dec.: −2.42[1] mas/yr |
| Parallax (π) | 2.15 ± 1.24[1] mas |
| Distance | 2,345±55[6] pc |
| Absolute magnitude (MV) | −6.90±0.07[6] |
| Details[6] | |
| Mass | 9-12 M☉ |
| Radius | 510±20 R☉ |
| Luminosity | 45,700+4,400 −4,000 L☉ |
| Surface gravity (log g) | 0.06±0.05 cgs |
| Temperature | 3750±60 K |
| Metallicity [Fe/H] | −0.35 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
T Persei is a red supergiant located in the constellationPerseus. It varies in brightness between magnitudes 8.3 and 9.7 and is considered to be a member of the Double Cluster.
T Persei is a member of the Perseus OB1 association around the h and χ Persei open clusters, around 2 degrees north of the centre of the clusters. It is generally treated as an outlying member of the clusters.[7] It lies half a degree away from S Persei, another red supergiant Double Cluster member.
T Per is a semiregular variable star, whose brightness varies from magnitude 8.34 to 9.7 over a period of 2,430 days.[2] Unlike many red supergiants, it does not appear to have a long secondary period.[3][8]
The Washington Double Star Catalog lists T Persei as having a 9th magnitude companion 0.1 arc-seconds away. This is derived from Hipparcos measurements. However, no other sources report a companion.[9]
References
- 1 2 3 4 5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- 1 2 Kiss, L. L.; Szabó, Gy. M.; Bedding, T. R. (2006). "Variability in red supergiant stars: Pulsations, long secondary periods and convection noise". Monthly Notices of the Royal Astronomical Society. 372 (4): 1721. arXiv:astro-ph/0608438
. Bibcode:2006MNRAS.372.1721K. doi:10.1111/j.1365-2966.2006.10973.x. - 1 2 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ↑ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
- 1 2 3 Baron, F.; Monnier, J. D.; Kiss, L. L.; Neilson, H. R.; Zhao, M.; Anderson, M.; Aarnio, A.; Pedretti, E.; Thureau, N.; Ten Brummelaar, T. A.; Ridgway, S. T.; McAlister, H. A.; Sturmann, J.; Sturmann, L.; Turner, N. (2014). "Chara/mirc Observations of Two M Supergiants in Perseus Ob1: Temperature, Bayesian Modeling, and Compressed Sensing Imaging". The Astrophysical Journal. 785: 46. arXiv:1405.4032. Bibcode:2014ApJ...785...46B. doi:10.1088/0004-637X/785/1/46.
- ↑ Gonzalez, Guillermo; Wallerstein, George (2000). "Elemental Abundances in Evolved Supergiants. II. The Young Clusters H and χ Persei". The Astronomical Journal. 119 (4): 1839. Bibcode:2000AJ....119.1839G. doi:10.1086/301319.
- ↑ Percy, John R.; Sato, Hiromitsu (2009). "Long Secondary Periods in Pulsating Red Supergiant Stars". Journal of the Royal Astronomical Society of Canada. 103: 11. Bibcode:2009JRASC.103...11P.
- ↑ 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.