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轩辕增廿二

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轩辕增廿二
轩辕增廿二的位置 (红圈处)
观测数据
历元 J2000.0      分点 J2000.0
星座 巨蟹座
巨蟹座ι A
赤经 08h 46m 41.81988s[1]
赤纬 +28° 45′ 35.6190″[1]
视星等 (V) 4.02[2]
巨蟹座ι B
赤经 08h 46m 39.98118s[1]
赤纬 +28° 45′ 54.1932″[1]
视星等 (V) 6.57[3]
特性
光谱分类G8II-III[4] + A2V[5]
天体测定
巨蟹座ι A
径向速度 (Rv)15.74 ± 0.13[6] km/s
自行 (μ) 赤经:-21.58 ± 0.75[1] mas/yr
赤纬:-45.69 ± 0.56[1] mas/yr
视差 (π)9.85 ± 0.61[1] mas
距离330 ± 20 ly
(102 ± 6 pc)
绝对星等 (MV)-1
巨蟹座ι B
径向速度 (Rv)25.00 ± 1.5[7] km/s
自行 (μ) 赤经:-22.74 ± 3.45[1] mas/yr
赤纬:-46.36 ± 2.56[1] mas/yr
详细资料
巨蟹座ι A
质量3.5 M
半径22 R
亮度260 L
温度4,954[8] K
金属量 [Fe/H]−0.14[6] dex
自转速度 (v sin i)170[9] km/s
巨蟹座ι B
亮度20 L
温度8,786[10] K
年龄263[11] Myr
其他命名
48 Cancri
参考资料库
SIMBAD资料
巨蟹座ι A和B (Jeffrey Fisher)

轩辕增廿二 (ι Cnc/巨蟹座ι) 是一个在巨蟹座双星,距离地球大约330光年

巨蟹座ι的两颗星距离30弧秒,只有缓慢的改变。虽然没有计算出轨道,但两星的自行十分相似,被认为是有引力关系的。[12]

较亮的巨蟹座ι A,是一个黄色的G型亮巨星视星等4.02。它是个钡星,认为是由渐近巨星分支星传输物质给伴星造成的。在巨蟹座ι系统里没有找到这个贡献者,但是推测有一个未看见的白矮星[13]

较暗的巨蟹座ι B,是一个白色的A型主序星视星等6.57。它是个壳层星,被快速自转抛出的物质环绕。[14]

参考资料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ Mermilliod, J.-C. Compilation of Eggen's UBV data, transformed to UBV (unpublished). Catalogue of Eggen's UBV data. 1986. Bibcode:1986EgUBV........0M. 
  3. ^ Ducati, J. R. VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system. CDS/ADC Collection of Electronic Catalogues. 2002, 2237. Bibcode:2002yCat.2237....0D. 
  4. ^ Keenan, Philip C.; McNeil, Raymond C. The Perkins catalog of revised MK types for the cooler stars. Astrophysical Journal Supplement Series. 1989, 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. 
  5. ^ Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS. Astronomy and Astrophysics Supplement. 1999, 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489. 
  6. ^ 6.0 6.1 Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey. Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity. The Astronomical Journal. 2008, 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209. 
  7. ^ Gontcharov, G. A. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system. Astronomy Letters. 2006, 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  8. ^ Kovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios. Monthly Notices of the Royal Astronomical Society. 2010, 408 (3): 1568. Bibcode:2010MNRAS.408.1568K. doi:10.1111/j.1365-2966.2010.17217.x. 
  9. ^ Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i. Astronomy and Astrophysics. 2002, 393 (3): 897. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. 
  10. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. Fundamental parameters and infrared excesses of Hipparcos stars. Monthly Notices of the Royal Astronomical Society. 2012, 427: 343. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. 
  11. ^ Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke. Stellar Parameters and Elemental Abundances of Late-G Giants. Publications of the Astronomical Society of Japan. 2008, 60 (4): 781. Bibcode:2008PASJ...60..781T. doi:10.1093/pasj/60.4.781. 
  12. ^ Eggen, Olin J. Photometry of F-K type bright giants and supergiants. 3: The luminosity, reddening, and heavy element abundance of GK stars. The Astronomical Journal. 1994, 107: 2184. Bibcode:1994AJ....107.2184E. doi:10.1086/117030. 
  13. ^ Eggleton, P. P.; Tokovinin, A. A. A catalogue of multiplicity among bright stellar systems. Monthly Notices of the Royal Astronomical Society. 2008, 389 (2): 869. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. 
  14. ^ Hauck, B.; Jaschek, C. A-shell stars in the Geneva system. Astronomy and Astrophysics. 2000, 354: 157. Bibcode:2000A&A...354..157H.