白羊座UX

白羊座UX是在北天的黃道星座白羊座的一個三合星系統。基於來自蓋亞衛星的視差測量，它距離太陽系大約165光年。主星，白羊座UX Aa，是一顆RS CVn型變星。這顆恆星的光度變化被認為是由於冷星斑和溫暖的耀斑組合，與恆星大氣層的基態溫度相對照。這種變化似乎是週期性，週期為8-9年。這顆恆星的亮度從視星等6.35到6.71不等，這意味著在理想的黑暗天空條件下，肉眼可能會間歇性地看到它。 一顆更遠的伴星，成員C，有著共同自行，並且處於相同的距離上。它是另一顆冷矮星，估計光譜等級為K2。任何一種估計的軌道都超過10萬年。 Ulvås, V. Aarum; Henry, G. W. BV photometry of UX Ari in the period 1987–2002. Astronomy & Astrophysics. May 2003, 402 (3): 1033–1041. Bibcode:2003A&A...402.1033A. doi:10.1051/0004-6361:20030304 .  Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 .  已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR. UX Ari. The International Variable Star Index. AAVSO. [28 October 2021]. （原始内容存档于2021-10-29）.  Strassmeier, Klaus G. Starspots. The Astronomy and Astrophysics Review. September 2009, 17 (3): 251–308. Bibcode:2009A&ARv..17..251S. doi:10.1007/s00159-009-0020-6 .  Guetter, H. H.; Hewitt, A. V. Photoelectric UBV photometry for 317 PZT and VZT stars. Publications of the Astronomical Society of the Pacific. June 1984, 96: 441–443. Bibcode:1984PASP...96..441G. doi:10.1086/131362 .  Alekseev, I. Yu. Three-Component Model of Spottedness in the Classical RS CVn System UX Ari. Astrophysics. September 2014, 57 (3): 344–351. Bibcode:2014Ap.....57..344A. S2CID 119963417. doi:10.1007/s10511-014-9339-4.  Karataș, Yüksel; Bilir, Selçuk; Eker, Zeki; Demircan, Osman; Liebert, James; Hawley, Suzanne L.; Fraser, Oliver J.; Covey, Kevin R.; Lowrance, Patrick; Kirkpatrick, J. Davy; Burgasser, Adam J. Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution. Monthly Notices of the Royal Astronomical Society. 2004, 349 (3): 1069–1092. Bibcode:2004MNRAS.349.1069K. S2CID 15290475. arXiv:astro-ph/0404219 . doi:10.1111/j.1365-2966.2004.07588.x.  Anderson, E.; Francis, Ch. XHIP: An extended hipparcos compilation. Astronomy Letters. May 2012, 38 (5): 331–346. Bibcode:2012AstL...38..331A. ISSN 1063-7737. S2CID 119257644. arXiv:1108.4971 . doi:10.1134/S1063773712050015. eISSN 1562-6873.  Hummel, C. A.; et al. Orbital Elements and Stellar Parameters of the Active Binary UX Arietis. The Astrophysical Journal. August 2017, 844 (2): 12. Bibcode:2017ApJ...844..115H. S2CID 43383613. doi:10.3847/1538-4357/aa7b87. hdl:10871/32318 . 115.  Peterson, W. M.; Mutel, R. L.; Lestrade, J. -F.; Güdel, M.; Goss, W. M. Radio Astrometry of the Triple Systems Algol and UX Arietis. The Astrophysical Journal. 2011, 737 (2): 104. Bibcode:2011ApJ...737..104P. S2CID 119229905. arXiv:1104.5005 . doi:10.1088/0004-637X/737/2/104.  Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 .  已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR. Tokovinin, Andrei. The Updated Multiple Star Catalog. The Astrophysical Journal Supplement Series. 2018-03-01, 235 (1): 6. Bibcode:2018ApJS..235....6T. ISSN 0067-0049. S2CID 119047709. arXiv:1712.04750 . doi:10.3847/1538-4365/aaa1a5.  Brinkman, Albert. High-Resolution Spectrum of UX Ari. Chandra Proposal ID #02200030. 2000: 434. Bibcode:2000cxo..prop..434B.  Drake, Stephen. Acis/hetg Spectroscopy of the Active Binaries Algol & UX Ari. Chandra Proposal ID #01200248. 1999: 20. Bibcode:1999cxo..prop...20D.  V. Aarum Ulvås & G. W. Henry. BV photometry of UX Ari in the period 1987-2002. Astronomy and Astrophysics. 2003.  HIP 16042 （页面存档备份，存于互联网档案馆） Image HD 21242 HIP 16042 （页面存档备份，存于互联网档案馆）