跳转到内容

蜀增一

维基百科,自由的百科全书
蜀增一(巨蛇座λ)
圖顯示巨蛇座和其周圍空間恆星的位置和邊界線。
蜀增一的位置(紅色圈)
觀測資料
曆元 J2000
星座 巨蛇座
星官
赤經 15h 46m 26.614s[1]
赤緯 +07° 21′ 11.04″[1]
視星等(V) 4.43[2]
特性
光谱分类G0 V[3]
U−B 色指数+0.11[2]
B−V 色指数+0.60[2]
变星类型可疑的
天体测定
徑向速度 (Rv)−66.4[4] km/s
自行 (μ) 赤经:-224.00 ± 0.29[1] mas/yr
赤纬:-70.64 ± 0.27[1] mas/yr
视差 (π)83.921 ± 0.32[1] mas
距离38.9 ± 0.1 ly
(11.92 ± 0.05 pc)
绝对星等 (MV)4.01[5]
詳細資料
質量1.14[6] M
半徑1.060 ± 0.152[7] R
表面重力 (log g)4.09[8]
亮度1.94[6] L
溫度5,884 ± 4.4[9] K
金属量 [Fe/H]−0.03[8] dex
自轉速度 (v sin i)3[10] km/s
年齡3.8–6.7[11] Gyr
其他命名
27 Serpentis, BD +7°3023, HD 141004, HIP 77257, HR 5868, SAO 121186.[3]
參考資料庫
SIMBAD资料

蜀增一 (巨蛇座λ,λ Ser)是在巨蛇座這個星座頭部的一顆恆星。它的視星等為4.43等[2],使它成為肉眼可見的恆星。依據依巴谷衛星測量的視差,估計這顆恆星與地球的距離大約是39.5光年(12.1秒差距[1]。僅管它與太陽有相似的恆星分類,但它比太陽更大,質量也更重[3]。它的光度幾乎是太陽的兩倍,這些能量是來自這顆恆星的外層大氣層在有效溫度5,884K的輻射[9]

蜀增一的徑向速度方向是朝向太陽,其值為66.4Kms−1[4]。大約再166,000年,這個系統將接近太陽至7.371正負0.258光年(2.260正負0.079秒差距)的距離,之後再遠離而去[12]

Morbey和Griffith(1887年)懷疑它有1837(5.03年)的週期變化[13],但它可能是有限的恆星活動。然而麥克唐納天文台的團隊已經假設它可能有一或多顆行星存在[13],設定行星的質量在0.16至2木星質量,在0.05和5.2天文單位的距離環繞著蜀增一。

相關條目

[编辑]

參考資料

[编辑]
  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. 2007, 474 (2): 653–664 [2018-06-15]. Bibcode:2007A&A...474..653V. arXiv:0708.1752可免费查阅. doi:10.1051/0004-6361:20078357. (原始内容存档于2019-12-07).  Vizier catalog entry 页面存档备份,存于互联网档案馆
  2. ^ 2.0 2.1 2.2 2.3 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. ^ 3.0 3.1 3.2 lam Ser -- Spectroscopic binary. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-12-15]. (原始内容存档于2020-11-05). 
  4. ^ 4.0 4.1 Wilson, Ralph Elmer. General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. 1953. Bibcode:1953GCRV..C......0W. 
  5. ^ Holmberg, J.; et al, The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics, Astronomy and Astrophysics, 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. 
  6. ^ 6.0 6.1 Valenti, J. A.; Fishcer, D. A. Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs. Astrophysical Journal Supplement Series. 2005, 159 (1): 141–166. Bibcode:2005ApJS..159..141V. doi:10.1086/430500. 
  7. ^ van Belle, Gerard T.; von Braun, Kaspar. Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars. The Astrophysical Journal. 2009, 694 (2): 1085–1098 [2018-06-15]. Bibcode:2009ApJ...694.1085V. arXiv:0901.1206可免费查阅. doi:10.1088/0004-637X/694/2/1085. (原始内容存档于2020-05-25). 
  8. ^ 8.0 8.1 Fuhrmann, Klaus. Nearby stars of the Galactic disk and halo. Astronomy and Astrophysics. October 1998, 338: 161–183. Bibcode:1998A&A...338..161F. 
  9. ^ 9.0 9.1 Kovtyukh; Soubiran, C.; Belik, S. I.; Gorlova, N. I. High precision effective temperatures for 181 F-K dwarfs from line-depth ratios. Astronomy and Astrophysics. 2003, 411 (3): 559–564 [2018-06-15]. Bibcode:2003A&A...411..559K. arXiv:astro-ph/0308429可免费查阅. doi:10.1051/0004-6361:20031378. (原始内容存档于2019-05-16). 
  10. ^ 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. 
  11. ^ Mamajek, Eric E.; Hillenbrand, Lynne A. Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics. The Astrophysical Journal. November 2008, 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. arXiv:0807.1686可免费查阅. doi:10.1086/591785. 
  12. ^ Dybczyński, P. A., Simulating observable comets. III. Real stellar perturbers of the Oort cloud and their output, Astronomy and Astrophysics, April 2006, 449 (3): 1233–1242, Bibcode:2006A&A...449.1233D, doi:10.1051/0004-6361:20054284 
  13. ^ 13.0 13.1 Morbey, C. L.; Griffith, R. F. On the reality of certain spectroscopic orbits. Astrophysical Journal. 1987, 317 (1): 343–352. Bibcode:1987ApJ...317..343M. doi:10.1086/165281. 

進階讀物

[编辑]
pFad - Phonifier reborn

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


Alternative Proxies:

Alternative Proxy

pFad Proxy

pFad v3 Proxy

pFad v4 Proxy