室宿一

室宿一 (飛馬座α ，縮寫為Alpha Peg或α Peg)，在西方的傳統名稱是, Markab /ˈmɑːrkæb/,，是飛馬座的第三亮星，但因為是秋季四邊形(飛馬座四邊形)這個星群的成員，因此拜耳在命名時，將它命名為飛馬座α星。 室宿一的恆星分類為A0IV，表明它是一顆已經耗盡其核心氫氣的A型次巨星，並且在演化上已經超越了主序帶。它的光譜也曾經被歸類為B9V 和B9.5III。 它旋轉的速度很快，投影自轉速度約為130Km/S，給出了沿恒星赤道方位速度的下限。光球層的有效溫度大約是10,000K，且恆星半徑已經膨脹至太陽半徑的五倍，釋放出的能量是太陽的165倍。 室宿一的英文名Markab源自于阿拉伯语مركب markab，意为“马鞍”；或者可能是Mankib的误写，源于阿拉伯语منكب الفرس Mankib al-Faras，意为“马肩上（的恒星）”。 在2016年，國際天文學聯合會組織了一個恒星名稱工作組（英语：IAU Working Group on Star Names）（WGSN）對恒星的專有名稱進行編目和標準化。WGSN於2016年7月發佈的第一份公告包括由WGSN核定的前兩批恆星名稱表，其中就包括室宿一的固有名稱"Markab"。 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.  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.  Abt, Helmut A.; Morrell, Nidia I. The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars. Astrophysical Journal Supplement. 1995, 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182.  Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1. Bibcode:2009yCat....102025S.  Wielen, R.; et al. Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions. Veröff. Astron. Rechen-Inst. Heidelb (Astronomisches Rechen-Institut Heidelberg). 1999, 35 (35): 1. Bibcode:1999VeARI..35....1W.  Katz, D.; Soubiran, C.; Cayrel, R.; Barbuy, B.; Friel, E.; Bienaymé, O.; Perrin, M. -N. Probing the Galactic thick disc vertical properties and interfaces. Astronomy and Astrophysics. 2011, 525: A90. Bibcode:2011A&A...525A..90K. doi:10.1051/0004-6361/201014840 .  De Rosa, R. J.; et al. The VAST Survey - III. The multiplicity of A-type stars within 75 pc. Monthly Notices of the Royal Astronomical Society. January 2014, 437 (2): 1216–1240. Bibcode:2014MNRAS.437.1216D. S2CID 88503488. arXiv:1311.7141 . doi:10.1093/mnras/stt1932.  Gordon, Kathryn D.; Gies, Douglas R.; Schaefer, Gail H.; Huber, Daniel; Ireland, Michael. Angular Sizes, Radii, and Effective Temperatures of B-type Stars from Optical Interferometry with the CHARA Array. The Astrophysical Journal. 2019, 873 (1): 91. Bibcode:2019ApJ...873...91G. doi:10.3847/1538-4357/ab04b2.  McDonald, I.; Zijlstra, A. A.; Watson, R. A. Fundamental parameters and infrared excesses of Tycho–Gaia stars. Monthly Notices of the Royal Astronomical Society. 2017, 471 (1): 770–791. Bibcode:2017MNRAS.471..770M. arXiv:1706.02208 . doi:10.1093/mnras/stx1433.  Gáspár, András; et al. The Correlation between Metallicity and Debris Disk Mass. The Astrophysical Journal. 2016, 826 (2): 171. Bibcode:2016ApJ...826..171G. S2CID 119241004. arXiv:1604.07403 . doi:10.3847/0004-637X/826/2/171.  Kunitzsch, Paul; Smart, Tim. A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations 2nd rev. Cambridge, Massachusetts: Sky Pub. 2006. ISBN 978-1-931559-44-7.  IAU Catalog of Star Names. [2016-07-28]. （原始内容存档于2018-07-07）.  Hoffleit, D; Warren, W. H. VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991). VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 1995, 5050. Bibcode:1995yCat.5050....0H.  Osawa, Kiyoteru. Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of A0 V Stars. Astrophysical Journal. 1959, 130: 159. Bibcode:1959ApJ...130..159O. doi:10.1086/146706.  IAU Working Group on Star Names (WGSN). [2016-05-22]. （原始内容存档于2020-05-13）.  Bulletin of the IAU Working Group on Star Names, No. 1 (PDF). [2016-07-28]. （原始内容存档 (PDF)于2018-04-17）.  https://web.archive.org/web/20070113023402/http://www.winshop.com.au/annew/Markab.html https://web.archive.org/web/20050310090255/http://einstein.stcloudstate.edu/Dome/clicks/markab.html