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參旗六

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Pi3 Orionis
參旗六在獵戶座中的位置
觀測資料
曆元 J2000.0
星座 獵戶座
星官 毕宿 參旗
赤經 04h 49m 50.41091s[1]
赤緯 +06° 57′ 40.5883″[1]
視星等(V) 3.16[2]
特性
光谱分类F6 V[2]
U−B 色指数+0.00[2]
B−V 色指数+0.46[2]
变星类型疑似變星[3]
天体测定
徑向速度 (Rv)24.1[4] km/s
自行 (μ) 赤经:464.06[1] mas/yr
赤纬:11.21[1] mas/yr
视差 (π)123.94 ± 0.17[1] mas
距离26.32 ± 0.04 ly
(8.07 ± 0.01 pc)
绝对星等 (MV)3.65[5]
詳細資料
質量1.236[6] M
半徑1.323 ± 0.004[7] R
表面重力 (log g)4.4[8]
亮度2.822 ± 0.030[7] L
溫度6,516 ± 19[7] K
金属量 [Fe/H]0.02[8] dex
自轉速度 (v sin i)17[9] km/s
年齡1.4[5] Gyr
其他命名
Tabit, π3 Ori, 1 Ori, BD+06°762, FK5 1134, GCTP 1077.00, Gliese 178, HD 30652, HIP 22449, HR 1543, LTT 11517, SAO 112106.[10]

參旗六,即獵戶座π3Pi3 Orionis、π3 Ori、π3 Orionis),是一顆位於獵戶座的恆星,西方傳統名稱是 Tabit[11]佛蘭斯蒂德命名法將該恆星命名為獵戶座1(1 Orionis)。它的視星等是肉眼可見的3.16[2]。參旗六是獵戶座中代表獅皮(或盾牌)的恆星中最亮的。根據視差量測,它和地球的距離是26.32光年(8.07秒差距[1]。雖然在參旗六旁至今並未發現太陽系外行星,該恆星仍被部分天文學家[谁?]認為它周圍的特定位置允許體積和地球相當的行星存在。

物理性質

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參旗六是一顆光譜類型 F6 V 的主序星,自1943年起它的光譜就是該型恆星的標準光譜[12]。它的質量是太陽的124%[6],半徑比太陽大32%,並且光度幾乎是太陽的3倍[7]。它的外層氣體有效溫度是6,516 K[7],因此屬於黃白色的F-型主序星。參旗六很可能是單一恆星,天球上與它接近的另一顆恆星是光學雙星[13]

雖然參旗六的徑向速度會以73.26日的週期變化,引起變化的原因較可能是恆星本身的活動,而非距離它相當近的行星引起。目前並未偵測到參旗六周圍有次恆星伴星存在,而麦克唐纳天文台的一個團隊則認為在質量0.84到46.7倍木星質量,距離母恆星0.05到5.2天文單位的限制條件下會有一或多顆行星存在[14]。此外,到目前為止即使有類似地球的行星存在,也並未觀測到其重力對母恆星運動造成擾動。

參見

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參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752可免费查阅, doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 2.3 2.4 Johnson, H. L.; Morgan, W. W., Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas, Astrophysical Journal, 1953, 117: 313–352, Bibcode:1953ApJ...117..313J, doi:10.1086/145697. 
  3. ^ Kukarkin, B. V.; et al., Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (Catalogue of suspected variable stars), Moscow: Academy of Sciences USSR Shternberg, 1981, Bibcode:1981NVS...C......0K. 
  4. ^ Evans, D. S., The Revision of the General Catalogue of Radial Velocities, Batten, Alan Henry; Heard, John Frederick (编), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, June 20–24, 1966, Bibcode:1967IAUS...30...57E. 
  5. ^ 5.0 5.1 Holmberg, J.; Nordström, B.; Andersen, J., The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics, Astronomy and Astrophysics, Supplement Series, July 2009, 501 (3): 941−947, Bibcode:2009A&A...501..941H, arXiv:0811.3982可免费查阅, doi:10.1051/0004-6361/200811191.  Note: see VizieR catalogue V/130页面存档备份,存于互联网档案馆).
  6. ^ 6.0 6.1 Takeda, G.; et al., Stellar parameters of nearby cool stars. II. Physical properties of ~1000 cool stars from the SPOCS catalog, Astrophysical Journal Supplement Series, 2007, 168: 297–318, Bibcode:2008yCat..21680297T  Note: see VizieR catalogue J/ApJS/168/297页面存档备份,存于互联网档案馆).
  7. ^ 7.0 7.1 7.2 7.3 7.4 Boyajian, Tabetha S.; et al, Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars, The Astrophysical Journal, February 2012, 746 (1): 101, Bibcode:2012ApJ...746..101B, arXiv:1112.3316可免费查阅, doi:10.1088/0004-637X/746/1/101.  See Table 10.
  8. ^ 8.0 8.1 Kuroczkin, D.; Wiszniewski, A., The problem of iron abundance in the SMR stars., Acta Astronomica, 1997, 27: 145–150, Bibcode:1977AcA....27..145K. 
  9. ^ 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. 
  10. ^ 1 Ori -- Variable Star, SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), [2011-01-07], (原始内容存档于2016-03-12) 
  11. ^ Moore, Patrick; Rees, Robin, Patrick Moore's Data Book of Astronomy 2nd, Cambridge University Press: 460, 2011 [2012-10-15], ISBN 0521899354, (原始内容存档于2020-09-10) 
  12. ^ Garrison, R. F., Anchor Points for the MK System of Spectral Classification, Bulletin of the American Astronomical Society, December 1993, 25: 1319 [2012-02-04], Bibcode:1993AAS...183.1710G, (原始内容存档于2019-06-25) 
  13. ^ Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878可免费查阅, doi:10.1111/j.1365-2966.2008.13596.x. 
  14. ^ Wittenmyer, Robert A.; et al., Detection Limits from the McDonald Observatory Planet Search Program, The Astronomical Journal, July 2006, 132 (1): 177–188, Bibcode:2006AJ....132..177W, arXiv:astro-ph/0604171可免费查阅, doi:10.1086/504942. 

外部連結

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