14 Persei
 
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 44m 05.16032s[1] |
| Declination | +44° 17′ 49.3422″[1] |
| Apparent magnitude (V) | 5.43[2] |
| Characteristics | |
| Spectral type | G0Ib[2] |
| B−V color index | +0.86[3] |
| Astrometry | |
| Radial velocity (Rv) | −0.70[4] km/s |
| Proper motion (μ) | RA: 2.77[1] mas/yr Dec.: −6.38[1] mas/yr |
| Parallax (π) | 3.32 ± 0.46[1] mas |
| Distance | approx. 1,000 ly (approx. 300 pc) |
| Absolute magnitude (MV) | −1.57[2] |
| Details | |
| Mass | 4.03[5] M☉ |
| Radius | 90[6] R☉ |
| Luminosity | 372[5] L☉ |
| Surface gravity (log g) | 1.42[2] cgs |
| Temperature | 5,624[5] K |
| Metallicity [Fe/H] | 0.00[2] dex |
| Rotational velocity (v sin i) | 8.7[5] km/s |
| Age | 162[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
14 Persei is a star in the constellation Perseus. Its apparent magnitude is 5.45 and it is around 301 parsecs (980 ly) distant.
The spectral classification is as a G0 yellow supergiant, but in other respects it appears to be a giant star.[2] The spectral classification has been given as G0Ib-IICa1CH-1[7] or G0Ib-IIa Ca1,[8] where the abundance suffixes indicate stronger Calcium lines than expected for the class or weaker hydrocarbons. Many other analyses of the spectrum give a class of G0Ib.[2][9]
14 Persei has been calculated to lie within the Cepheid instability strip although it is not considered to be variable. Uncertainty in the absolute magnitude means that the star may actually lie near the instability strip but not on it. Small periodic radial velocity variations are seen, but an order of magnitude or more smaller than for Cepheid variables and with longer periods than would be expected for pulsations. The cause of the radial velocity changes and the difference between variable and non-variable stars within the instability strip is unknown.[10]
References
- 1 2 3 4 5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. - 1 2 3 4 5 6 7 Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (2008). "Stellar Parameters and Elemental Abundances of Late-G Giants". Publications of the Astronomical Society of Japan. 60 (4): 781. arXiv:0805.2434. Bibcode:2008PASJ...60..781T. doi:10.1093/pasj/60.4.781.
- ↑ Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 3 4 5 Takeda, Yoichi; Tajitsu, Akito (2014). "Spectroscopic study on the beryllium abundances of red giant stars". Publications of the Astronomical Society of Japan. 66 (5): 91. arXiv:1406.7066. Bibcode:2014PASJ...66...91T. doi:10.1093/pasj/psu066.
- ↑ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics. 367 (2): 521. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.
- ↑ Keenan, P. C.; Pitts, R. E. (1980). "Revised MK spectral types for G, K, and M stars". Astrophysical Journal Supplement Series. 42: 541. Bibcode:1980ApJS...42..541K. doi:10.1086/190662.
- ↑ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series (ISSN 0067-0049). 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
- ↑ Gray, R. O.; Graham, P. W.; Hoyt, S. R. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. II. Basic Parameters of Program Stars and the Role of Microturbulence". The Astronomical Journal. 121 (4): 2159. Bibcode:2001AJ....121.2159G. doi:10.1086/319957.
- ↑ Butler, R. Paul (1998). "A Precision Velocity Study of Photometrically Stable Stars in the Cepheid Instability Strip". The Astrophysical Journal. 494: 342. Bibcode:1998ApJ...494..342B. doi:10.1086/305195.