Astronomy:40 Persei
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 42m 22.64555s[1] |
| Declination | 33° 57′ 54.0893″[1] |
| Apparent magnitude (V) | 4.97[2] |
| Characteristics | |
| Spectral type | B0.5V[3] + A1Vn[4] |
| U−B color index | −0.84[5] |
| B−V color index | +0.00[5] |
| Astrometry | |
| Radial velocity (Rv) | +22.00[6] km/s |
| Proper motion (μ) | RA: +2.71[1] mas/yr Dec.: −5.91[1] mas/yr |
| Parallax (π) | 3.09 ± 0.21[1] mas |
| Distance | 1,060 ± 70 ly (320 ± 20 pc) |
| Absolute magnitude (MV) | −2.26[2] |
| Details | |
| 40 Per A | |
| Mass | 12.5[7] M☉ |
| Luminosity | 936[2] L☉ |
| Surface gravity (log g) | 4.36[8] cgs |
| Temperature | 29,330[9] K |
| Metallicity [Fe/H] | −0.43[2] dex |
| Rotational velocity (v sin i) | 10[10] km/s |
| Age | 7.2[11] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
40 Persei is a wide binary star[13] system in the northern constellation of Perseus. It has the Bayer designation ο Persei, while 40 Persei is the Flamsteed designation. The system is visible to the naked eye as a faint, blue-white hued point of light with an apparent visual magnitude of 4.97.[2] It is located approximately 1060 light years away from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +22 km/s.[6] The system is a member of the Perseus OB2 association of co-moving stars.[14]
The primary component is a massive B-type main-sequence star with a stellar classification of B0.5V.[3] It is about 7.2[11] million years old and has a very low projected rotational velocity for an early B-type star,[15] measured at 10 km/s.[10] This star has 12.5[7] times the mass of the Sun and is radiating 936[2] times the Sun's luminosity from its photosphere at an effective temperature of 29,330 K.[9] The companion is magnitude 10.04, A-type main-sequence star with a class of A1Vn, and is located at an angular separation of 19.8″ from the primary.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. Vizier catalog entry
- ↑ 3.0 3.1 Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H.
- ↑ 4.0 4.1 Mason, Brian D. et al. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. Vizier catalog entry
- ↑ 5.0 5.1 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode: 2014JAVSO..42..443M.Vizier catalog entry
- ↑ 6.0 6.1 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 7.0 7.1 Tetzlaff, N. et al. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society 410 (1): 190–200. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode: 2011MNRAS.410..190T. Vizier catalog entry
- ↑ Soubiran, Caroline et al. (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics 591: A118. doi:10.1051/0004-6361/201628497. Bibcode: 2016A&A...591A.118S.
- ↑ 9.0 9.1 Zorec, J. et al. (2009). "Fundamental parameters of B supergiants from the BCD system". Astronomy and Astrophysics 501 (1): 297–320. doi:10.1051/0004-6361/200811147. Bibcode: 2009A&A...501..297Z.
- ↑ 10.0 10.1 Abt, Helmut A. et al. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal 573 (1): 359–365. doi:10.1086/340590. Bibcode: 2002ApJ...573..359A.
- ↑ 11.0 11.1 Seyfert, C. K. et al. (July 1960). "A Study of the II Persei Association". Astrophysical Journal 132: 58. doi:10.1086/146900. Bibcode: 1960ApJ...132...58S.
- ↑ "40 Per". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=40+Per.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
- ↑ Lesh, J. R. (September 1969). "Internal motions in the associations II Per and I Lac.". Astronomical Journal 74: 891–898. doi:10.1086/110878. Bibcode: 1969AJ.....74..891L.
- ↑ Guthrie, B. N. G. (September 1984). "The rotation of early B-type stars and the problem of star formation". Monthly Notices of the Royal Astronomical Society 210: 159–171. doi:10.1093/mnras/210.1.159. Bibcode: 1984MNRAS.210..159G.
 |  |
