九卿一(Rho Virginis、ρ Vir、ρ Virginis)是星座室女座中的一顆恆星,拜耳名稱為室女座ρ。它的視星等為 +4.9[2],這使得從都市地區用肉眼觀看是一個挑戰(根據波特爾暗空分類法)。到這顆恆星的距離是用視差方法直接量測的,這使其118.3光年(36.3秒差距)有大約一光年的誤差範圍[1]。
九卿一是一顆A型主序星,恆星分類為A0V[3]。它的半徑比太陽大60%[6],質量大約是太陽的兩倍。因此,它以比太陽更高的速度產生能量,光度超過太陽的14倍[6]。外層大氣的有效溫度為8,930 K[6],這就是它發出A型恆星白色光芒的原因。它被歸類為盾牌座δ型變星,亮度在0.5到2.4小時內變化0.02等。
這顆恆星已被確定為牧夫座λ型星,顯示出鐵峰元素的低豐度。它顯示出紅外發射過量,但尚不清楚這是由星周岩屑盤引起的,還是由恆星穿過並加熱擴散的星際塵埃雲引起的。很可能是前者[6],在這種情況下,塵埃盤的半徑約為37AU,平均溫度為90K[9]。
參考資料[编辑]
- ^ 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. S2CID 18759600. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 Wielen, R.; et al, Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions, Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg (Astronomisches Rechen-Institut Heidelberg), 1999, 35 (35): 1, Bibcode:1999VeARI..35....1W.
- ^ 3.0 3.1 Cowley, A.; et al, A study of the bright A stars. I. A catalogue of spectral classifications, Astronomical Journal, April 1969, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ 4.0 4.1 Johnson, H. L.; et al, UBVRIJKL photometry of the bright stars, Communications of the Lunar and Planetary Laboratory, 1966, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
- ^ Paunzen, E.; et al, The status of Galactic field λ Bootis stars in the post-Hipparcos era, Monthly Notices of the Royal Astronomical Society, November 2002, 336 (3): 1030–1042, Bibcode:2002MNRAS.336.1030P, S2CID 2389489, arXiv:astro-ph/0207488 , doi:10.1046/j.1365-8711.2002.05865.x.
- ^ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Martínez-Galarza, J. R.; et al, Infrared Emission by Dust Around λ Bootis Stars: Debris Disks or Thermally Emitting Nebulae?, The Astrophysical Journal, March 2009, 694 (1): 165–173, Bibcode:2009ApJ...694..165M, S2CID 14298654, arXiv:0812.2198 , doi:10.1088/0004-637X/694/1/165.
- ^ 7.0 7.1 Sturenburg, S., Abundance Analysis of Lambda-Bootis Stars, Astronomy and Astrophysics, September 1993, 277 (1): 139, Bibcode:1993A&A...277..139S.
- ^ Royer, F.; Zorec, J.; Gómez, A. E., Rotational velocities of A-type stars. III. Velocity distributions, Astronomy and Astrophysics, February 2007, 463 (2): 671–682, Bibcode:2007A&A...463..671R, S2CID 18475298, arXiv:astro-ph/0610785 , doi:10.1051/0004-6361:20065224.
- ^ Zuckerman, B.; Song, Inseok, Dusty Debris Disks as Signposts of Planets: Implications for Spitzer Space Telescope, The Astrophysical Journal, March 2004, 603 (2): 738–743, Bibcode:2004ApJ...603..738Z, S2CID 3456817, arXiv:astro-ph/0311546 , doi:10.1086/381700.
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| 恒星 | 拜耳 | |
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| 佛氏命名 |
- 1 (ω)
- 2 (ξ)
- 3 (ν)
- 4 (A1)
- 5 (β, Zavijava)
- 6 (A2)
- 7 (b)
- 8 (π)
- 9 (ο)
- 10
- 11
- 12
- 13
- 14
- 15 (η, Zaniah)
- 16 (c)
- 17
- 20
- 21 (q)
- 25 (f)
- 26 (χ)
- 27
- 28
- 29 (γ, Porrima)
- 30 (ρ)
- 31 (d1)
- 32 (d2)
- 33
- 34
- 35
- 37
- 38
- 40 (ψ)
- 41
- 43 (δ, Auva)
- 44
- 46
- 47 (ε, Vindemiatrix)
- 48
- 49
- 50
- 51 (θ)
- 53
- 54
- 55
- 56
- 57
- 59 (e)
- 60 (σ)
- 61
- 62
- 63
- 64
- 65
- 66
- 67 (α, Spica)
- 68 (i)
- 69
- 70
- 71
- 72
- 73
- 74 (l, "el")
- 75
- 76 (h)
- 77
- 78 (o, small Latin "o")
- 79 (ζ, Heze)
- 80
- 82 (m)
- 83
- 84
- 85
- 86
- 87
- 89
- 90 (p)
- 92
- 93 (τ)
- 94
- 95
- 96
- 98 (κ)
- 99 (ι, Syrma)
- 100 (λ, Khambalia)
- 102 (υ)
- 104
- 105 (φ)
- 106
- 107 (μ, Rijl al Awwa)
- 108
- 109
- 110
- 巨蛇座1 (M)
- 巨蛇座2
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