參旗六
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 | |
參旗六,即獵戶座π3(Pi3 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
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
參考資料
- ^ 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 , doi:10.1051/0004-6361:20078357.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 5.0 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 , 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).
- ^ 6.0 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).
- ^ 7.0 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 , doi:10.1088/0004-637X/746/1/101. See Table 10.
- ^ 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.
- ^ 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.
- ^ 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)
- ^ 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)
- ^ 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)
- ^ 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 , doi:10.1111/j.1365-2966.2008.13596.x.
- ^ 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 , doi:10.1086/504942.
外部連結
- Pi3 Orionis 2?. SolStation. [2008-07-11]. (原始内容存档于2008-07-19).