天船四,即英仙座ψ(ψ Persei),是一顆位於英仙座Be星,距離地球約700光年

天船四(英仙座ψ)
ψ Persei
觀測資料
曆元 J2000
星座 英仙座
星官 胃宿 天船
赤經 03h 36m 29.3789s[1]
赤緯 +48° 11′ 33.481″[1]
視星等(V) 4.310[2]
特性
光譜分類B5Ve[3]
U−B 色指數−0.56[4]
B−V 色指數−0.06[4]
變星類型仙后座γ型變星[5]
天體測定
徑向速度 (Rv)−1.1[6] km/s
自行 (μ) 赤經:+21.41[1] mas/yr
赤緯:−27.58[1] mas/yr
視差 (π)4.66 ± 0.73[1] mas
距離approx. 700 ly
(approx. 210 pc)
詳細資料
自轉速度 (v sin i)390[7] km/s
其他命名
37 Persei, BD+47 857, HD 22192, HIP 16826, HR 1087, SAO 38980.[2]

Be星是一種殼層星,在其赤道周圍有氣體的星周盤環繞,天船四有明顯的發射光譜視星等也在變化。[5] 天船四的自轉非常快速,赤道的投影自轉速度(v sin i)至少為390 km/s。[7]

天船四可能是疏散星團英仙座α星團的成員,但它的自行速度明顯高於英仙座α星團的其他恆星。[8]

參考資料

  1. ^ 1.0 1.1 1.2 1.3 1.4 Perryman, M. A. C.; et al. The Hipparcos Catalogue. Astronomy and Astrophysics. 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P. 
  2. ^ 2.0 2.1 psi Per -- Be Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2011-02-24]. (原始內容存檔於2020-11-05). 
  3. ^ Lesh, Janet Rountree. The Kinematics of the Gould Belt: an Expanding Group?. Astrophysical Journal Supplement. December 1968, 17: 371. Bibcode:1968ApJS...17..371L. doi:10.1086/190179. 
  4. ^ 4.0 4.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J. 
  5. ^ 5.0 5.1 Percy, John R.; Ivans, Inese I.; Fried, Robert E.; Paparo, Margit. Short-term photometric variability of Psi Persei and Zeta Tauri. Publications of the Astronomical Society of the Pacific. February 1994, 106 (696): 131–133. Bibcode:1994PASP..106..131P. doi:10.1086/133356. 
  6. ^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (編). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union: 57–63. June 20–24, 1966. Bibcode:1967IAUS...30...57E.  |year=|date=不匹配 (幫助)
  7. ^ 7.0 7.1 Bernacca, P. L.; Perinotto, M. A Catalogue of Stellar Rotational Velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1). Bibcode:1970CoAsi.239....1B. 
  8. ^ Morrell, Nidia; Abt, Helmut A. Spectroscopic binaries in the Alpha Persei cluster. Astrophysical Journal, Part 1. July 10, 1992, 393 (2): 666–673. Bibcode:1992ApJ...393..666M. doi:10.1086/171534.