Psi Persei

Psi Persei
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 36m 29.3789s[1]
Declination +48° 11′ 33.481″[1]
Apparent magnitude (V) 4.310[2]
Characteristics
Spectral type B5Ve[3]
U−B color index −0.56[4]
B−V color index −0.06[4]
Variable type γ Cas[5]
Astrometry
Radial velocity (Rv) −1.1[6] km/s
Proper motion (μ) RA: +21.41[1] mas/yr
Dec.: −27.58[1] mas/yr
Parallax (π) 4.66 ± 0.73[1] mas
Distance approx. 700 ly
(approx. 210 pc)
Details
Rotational velocity (v sin i) 390[7] km/s
Other designations
37 Persei, BD+47 857, HD 22192, HIP 16826, HR 1087, SAO 38980.[2]

Psi Persei (ψ Per) is a Be star in the constellation Perseus. This is a shell star that has a circumstellar disc of gas surrounding the equator. As a result of this disc, the spectrum of this star shows emission lines and the magnitude varies over a period of about a day.[5] The star is rotating rapidly with a projected rotational velocity (v sin i) along the equator of 390 km/s or greater.[7]

This star may be a member of the Alpha Persei Cluster, although its proper motion is high compared to other members.[8]

References

  1. ^ a b c d e Perryman, M. A. C.; et al (1997). "The Hipparcos Catalogue". Astronomy and Astrophysics 323: L49–L52. Bibcode 1997A&A...323L..49P. 
  2. ^ a b "psi Per -- Be Star". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Psi+Persei. Retrieved 2011-02-24. 
  3. ^ Lesh, Janet Rountree (December 1968). "The Kinematics of the Gould Belt: an Expanding Group?". Astrophysical Journal Supplement 17: 371. Bibcode 1968ApJS...17..371L. doi:10.1086/190179. 
  4. ^ a b Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory 4 (99). Bibcode 1966CoLPL...4...99J. 
  5. ^ a b Percy, John R.; Ivans, Inese I.; Fried, Robert E.; Paparo, Margit (February 1994). "Short-term photometric variability of Psi Persei and Zeta Tauri". Publications of the Astronomical Society of the Pacific 106 (696): 131–133. Bibcode 1994PASP..106..131P. doi:10.1086/133356. 
  6. ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick. Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. pp. 57–63. Bibcode 1967IAUS...30...57E. 
  7. ^ a b Bernacca, P. L.; Perinotto, M. (1970). "A Catalogue of Stellar Rotational Velocities". Contributi Osservatorio Astronomico di Padova in Asiago 239 (1). Bibcode 1970CoAsi.239....1B. 
  8. ^ Morrell, Nidia; Abt, Helmut A. (July 10, 1992). "Spectroscopic binaries in the Alpha Persei cluster". Astrophysical Journal, Part 1 393 (2): 666–673. Bibcode 1992ApJ...393..666M. doi:10.1086/171534. 
Stars of Perseus
Bayer
Flamsteed
Nearby
  • GJ 1068
Other