M40 (雙星)

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梅西耶40
观测数据
曆元 J2000.0      分點 J2000.0
星座 大熊座
A
赤經 12h 22m 12.5272s[1]
赤緯 +58° 4′ 58.549″[1]
視星等 (V) 9.64[2]
B
赤經 12h 22m 18.9992s[3]
赤緯 +58° 5′ 10.366″[3]
視星等 (V) 10.11[2]
特性
光谱分类K0 III[4]
天体测定
A
视差 (π)3.2191 ± 0.0118[1] mas
距离1,013 ± 4 ly
(311 ± 1 pc)
绝对星等 (MV)+0.88[4]
B
视差 (π)6.9328 ± 0.0155[3] mas
距离470.5 ± 0.8 ly
(144.2 ± 0.3 pc)
绝对星等 (MV)+4.0[4]
詳細資料
A
質量1.15[5] M
半徑4.48[6] R
表面重力 (log g)3.16[5]
亮度13[6] L
溫度4,957[5] K
金属量 [Fe/H]−0.164[7] dex
年齡4.1[7] Gyr
B
質量1.00[5] M
半徑1.1[8] R
表面重力 (log g)4.36[5]
亮度1.56[8] L
溫度6,146[5] K
其他命名
M40, WNC 4, BD+56 1372、​CCDM 12223+5805、​WDS J12222+5805
參考資料庫
SIMBAD资料
A
B

梅西耶40(也稱為Winnecke 4WNC 4)是在大熊座的一對雙星,它是在1764年被梅西耶於搜尋星雲中發現的。約翰·赫維留斯曾報告在這個區域內有星雲,但梅西耶沒有發現任何星雲,就以這個雙星來取代。在1863年,弗里德里希·奧古斯特·特奧多爾·溫尼克再度發現這對雙星,並賦與Winnecke 4的編號。

在1991年,這對雙星的主伴兩星相距51".7,比梅西耶發現時分得更開,但一般認為這只是一對光學雙星(假雙星),而不是有物理關聯的系統。


參考資料

  1. ^ 1.0 1.1 1.2 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533可免费查阅. doi:10.1051/0004-6361/202039657可免费查阅.  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. The Tycho-2 catalogue of the 2.5 million brightest stars. Astronomy and Astrophysics. March 2000, 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361. 
  3. ^ 3.0 3.1 3.2 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533可免费查阅. doi:10.1051/0004-6361/202039657可免费查阅.  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  4. ^ 4.0 4.1 4.2 Nugent, Richard L. The Nature of the Double Star M40. Journal of the Royal Astronomical Society of Canada. 2002, 96: 63. Bibcode:2002JRASC..96...63N. 
  5. ^ 5.0 5.1 5.2 5.3 5.4 5.5 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18. Astronomy & Astrophysics. August 2019, 628: A94. Bibcode:2019A&A...628A..94A. ISSN 0004-6361. arXiv:1904.11302可免费查阅. doi:10.1051/0004-6361/201935765可免费查阅. 
  6. ^ 6.0 6.1 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365可免费查阅. doi:10.1051/0004-6361/201833051.  VizieR中此天体在盖亚望远镜第二批数据发布的记录
  7. ^ 7.0 7.1 Sit, Tawny; Ness, M. K. The Age Distribution of Stars in the Milky Way Bulge. The Astrophysical Journal. 2020, 900 (1): 4. Bibcode:2020ApJ...900....4S. S2CID 219179385. arXiv:2006.01158可免费查阅. doi:10.3847/1538-4357/ab9ff6可免费查阅. 
  8. ^ 8.0 8.1 Stassun, Keivan G.; et al. The Revised TESS Input Catalog and Candidate Target List. The Astronomical Journal. 2019-10-01, 158 (4): 138. Bibcode:2019AJ....158..138S. ISSN 0004-6256. S2CID 166227927. arXiv:1905.10694可免费查阅. doi:10.3847/1538-3881/ab3467可免费查阅. hdl:1721.1/124721可免费查阅. 

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