ケフェウス座デルタ星とは - わかりやすく解説 Weblio辞書

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ケフェウス座デルタ星

出典: フリー百科事典『ウィキペディア（Wikipedia）』 (2021/10/13 15:10 UTC 版)

ケフェウス座δ星（ケフェウスざデルタせい、δ Cephei、δ Cep）は、ケフェウス座の恒星で地球から約797光年離れた位置にある連星系である。この距離では、視線上のガスや塵による星間減光のため、視等級が0.23等暗くなる^[12]。

脚注

注釈

^ ^a ^b パーセクは1 ÷ 年周視差（秒）より計算、光年は1÷年周視差（秒）×3.2615638より計算
^ 視等級 + 5 + 5×log（年周視差（秒））より計算。小数第1位まで表記

出典

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p “del Cep -- Classical Cepheid (delta Cep type)”. SIMBAD. CDS. 2017年8月1日閲覧。
^ ^a ^b Engle, S. G.; et al. (2014-10). “The Secret Lives of Cepheids: Evolutionary Changes and Pulsation-induced Shock Heating in the Prototype Classical Cepheid δ Cep”. Astrophysical Journal 794 (1): 80. arXiv:1409.8628. Bibcode: 2014ApJ...794...80E. doi:10.1088/0004-637X/794/1/80.
^ ^a ^b ^c ^d “GCVS”. Results for del Cep. 2017年8月1日閲覧。
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^ ^a ^b ^c Matthews, L. D.; et al. (2012-01), “New Evidence for Mass Loss from δ Cephei from H I 21 cm Line Observations”, Astrophysical Journal 744 (1): 53, arXiv:1112.0028, Bibcode: 2012ApJ...744...53M, doi:10.1088/0004-637X/744/1/53
^ Caputo, F.; et al. (2005-08), “Pulsation and Evolutionary Masses of Classical Cepheids. I. Milky Way Variables”, Astrophysical Journal 629 (2): 1021-1033, Bibcode: 2005ApJ...629.1021C, doi:10.1086/431641
^ De Medeiros, J. R.; et al. (2014-01), “A catalog of rotational and radial velocities for evolved stars. V. Southern stars”, Astronomy and Astrophysics, Bibcode: 2014A&A...561A.126D, doi:10.1051/0004-6361/201220762
^ James B. Kaler. “DELTA CEP”. STARS. 2017年8月1日閲覧。
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^ ^a ^b 輝星星表第5版
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p “HD 213307 -- Star suspected of Variability”. SIMBAD. CDS. 2017年7月22日閲覧。
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^ ^a ^b Mason, Brian D.; Hartkopf, William I.; Hurowitz, Haley M. (2013-09), “Speckle Interferometry at the U.S. Naval Observatory. XIX”, Astronomical Journal 146 (3): 56, Bibcode: 2013AJ....146...56M, doi:10.1088/0004-6256/146/3/56
^ Evans, Nancy Remage; et al. (2016-05), “Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids”, Astronomical Journal 151 (5): 129, Bibcode: 2016AJ....151..129E, doi:10.3847/0004-6256/151/5/129
^ Evans, Nancy Remage; et al. (2013-10). “Binary Cepheids: Separations and Mass Ratios in 5 M_⊙ Binaries”. Astronomical Journal 146 (4): 93. arXiv:1307.7123. Bibcode: 2013AJ....146...93R. doi:10.1088/0004-6256/146/4/93.
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^ “宇宙のものさしはあてにならない？　ケフェイド変光星の物質放出の証拠”. AstroArts (2011年1月20日). 2017年7月22日閲覧。
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