天苑增三

天爐座α（α Fornacis, α For）是天爐座最亮的恆星，但只比4等星亮一點。中國傳統名天苑增三，它在西洋的固有名稱是Dalim （出自皮亞齊的星表Palermo Catalogue（英语：Palermo Catalogue））和Fornacis（在Burritt（英语：Elijah Hinsdale Burritt）的星圖）。這顆恆星最初的名稱是 波江座12。 天爐座α的光譜類型是F8IV，其中的IV表示它的亮度是在演化上已經離開主序星的次巨星。它的質量比太陽重約33%，年齡是29億歲。天爐座α是一對聯星 ，有著高自行運動。這個系統顯示出紅外過量，暗示可能有類似岩屑盤的拱星盤 第二顆恆星已經被確認是顆藍掉隊星，它可能是合併了之前存在的第三顆恆星，或是累積了它的物質。它是個強X射線源，質量約為太陽的78% 。 這顆恆星的空間速度元件是（U、 V、 W） = （–35，+ 20，+ 30）km/s。大約35萬年前，天爐座α星曾於A型主序星的時鐘座ν有過一次親密的接觸。估計曾互相接近至0.265 ly（0.081 pc）的距離，使這兩顆恆星都有岩屑盤。 Perryman, M. A. C.; et al. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.  LHS 1515 -- High proper-motion Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-05-10]. （原始内容存档于2016-04-13）.  Favata, F.; Micela, G.; Sciortino, S. The [Fe/H] distribution of a volume limited sample of solar-type stars and its implications for galactic chemical evolution.. Astronomy and Astrophysics. July 1997, 323: 809–818. Bibcode:1997A&A...323..809F.  Rakos, K. D.; et al. Photometric and astrometric observations of close visual binaries. Astronomy and Astrophysics Supplement Series. February 1982, 47: 221–235. Bibcode:1982A&AS...47..221R.  Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. June 20–24, 1966 [2009-09-10]. Bibcode:1967IAUS...30...57E. （原始内容存档于2019-06-26）.  Santos, N. C.; Israelian, G.; Mayor, M. The metal-rich nature of stars with planets. Astronomy and Astrophysics. July 2001, 373 (3): 1019–1031. Bibcode:2001A&A...373.1019S. arXiv:astro-ph/0105216 . doi:10.1051/0004-6361:20010648.  Bruntt, H.; et al, Accurate fundamental parameters for 23 bright solar-type stars, Monthly Notices of the Royal Astronomical Society, July 2010, 405 (3): 1907–1923, Bibcode:2010MNRAS.405.1907B, arXiv:1002.4268 , doi:10.1111/j.1365-2966.2010.16575.x  Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs. Astronomy and Astrophysics. May 2004, 418 (3): 989–1019. Bibcode:2004A&A...418..989N. arXiv:astro-ph/0405198 . doi:10.1051/0004-6361:20035959.  See VizierR catalogue V/130 （页面存档备份，存于互联网档案馆）. 伊世同 《中西对照恒星图表》 Piazzi, G (编). Praecipuarum Stellarum Inerrantium Positiones Mediae Ineunte Saeculo XIX: ex Observationibus Habitis in Specula Panormitana ab anno 1792 ad annum 1813. Palermo. 1814: 21.  Kunitzsch, P. Arabische Sternnamen in Europa. Wiesbaden: Otto Harrassowitz. 1959: 155.  Laffitte, R. Héritages arabes: Des noms arabes pour les étoiles 2éme revue et corrigée. Paris: Librairie Orientaliste Paul Geunthner / Les Cahiers de l'Orient. 2005: 229.  Burritt, E. H. Atlas, Designed to Illustrate the Geography of the Heavens new. New York: F. J. Huntington. 1835.  plate III. Lopez, Bruno; Schneider, Jean; Danchi, William C. Can Life Develop in the Expanded Habitable Zones around Red Giant Stars?. The Astrophysical Journal. July 2005, 627 (2): 974–985. Bibcode:2005ApJ...627..974L. arXiv:astro-ph/0503520 . doi:10.1086/430416.  Söderhjelm, Staffan. Visual binary orbits and masses POST HIPPARCOS. Astronomy and Astrophysics. January 1999, 341: 121–140. Bibcode:1999A&A...341..121S.  Oudmaijer, Rene D.; et al. SAO stars with infrared excess in the IRAS Point Source Catalog. Astronomy and Astrophysics Supplement Series. December 1992, 96 (3): 625–643. Bibcode:1992A&AS...96..625O.  Fuhrmann, K.; Chini, R., Multiplicity among F-type Stars. II, The Astrophysical Journal, August 2015, 809 (1): 19, Bibcode:2015ApJ...809..107F, doi:10.1088/0004-637X/809/1/107, 107.  Gliese, W. Catalogue of Nearby Stars. Veröffentlichungen des Astronomischen Rechen-Instituts Heidelberg. 1969. Bibcode:1969VeARI..22....1G.  Deltorn, J.-M.; Kalas, P. Search for Nemesis Encounters with Vega, ε Eridani, and Fomalhaut. Ray Jayawardhana; Thomas Greene (编). Young Stars Near Earth: Progress and Prospects. ASP Conference Series 244. San Francisco: Astronomical Society of the Pacific: 227. 2001. Bibcode:2001ASPC..244..227D. ISBN 1-58381-082-X.  α For (Dalim)（页面存档备份，存于互联网档案馆） - SKY-MAP.ORG（页面存档备份，存于互联网档案馆） LHL Digital Collections（页面存档备份，存于互联网档案馆） - Linda Hall library（页面存档备份，存于互联网档案馆）