天苑四
註解和參考資料

1 2 3 4 5 6 7 8 9 10 11 12  . SIMBAD. Centre de Données astronomiques de Strasbourg.   [2007-11-29]. [永久]
1 2  Mendoza, E. E.; Gomez, V. T.; Gonzalez, S., , The Astronomical Journal, 1978-06, 83: 606–614, Bibcode:1978AJ.....83..606M, doi:10.1086/112242
1 2  . General Catalog of Variable Stars. Sternberg Astronomical Institute（英语：）, Moscow, Russia.   [2009-05-20]. （原始内容存档于2011-07-24）.
1 2 3 4 5  Staff. . Research Consortium on Nearby Stars. 2007-06-08  [2007-11-29]. （原始内容存档于2012-05-13）.
1 2  Johnson, H. M.; Wright, C. D. . Astrophysical Journal Supplement Series. 1983, 53: 643–711  [2007-11-29]. doi:10.1086/190905. （原始内容存档于2019-03-26）. —see p. 653.
↑  Zhao, G.; Chen, Y. Q.; Qiu, H. M.; Li, Z. W. . The Astronomical Journal. 2002, 124 (4): 2224–2232  [2007-06-01]. doi:10.1086/342862.
1 2 3  Santos, N. C.; Israelian, G.; Mayor, M., , Astronomy and Astrophysics, March 2004, 415 (3): 1153–1166, Bibcode:2004A&A...415.1153S, arXiv:astro-ph/0311541 , doi:10.1051/0004-6361:20034469. —the percentage of iron is given by  {\begin{smallmatrix}10^{-0.13}=0.74\end{smallmatrix}}, or 74%
1 2 3  Di Folco, E.;  et al, , Astronomy and Astrophysics, November 2004, 426 (2): 601–617, Bibcode:2004A&A...426..601D, doi:10.1051/0004-6361:20047189.
1 2  Backman, D.;  et al, , The Astrophysical Journal, 2008, 690 (2): 1522–1538, Bibcode:2009ApJ...690.1522B, arXiv:0810.4564 , doi:10.1088/0004-637X/690/2/1522.
↑  Aguilar, David A.; Pulliam, Christine, , 哈佛-史密松天体物理中心, 2008-10-27  [2008-11-10], （原始内容存档于2008-11-14）.
↑  Data at http://www.solstation.com/stars/eps-erid.htm （页面存档备份，存于）, accessed on November 28, 2008.
↑  Campbell, William Wallace. . New York: The MacMillan Company. 1899.
↑  Narisada, Kohei; Schreuder, Duco, , Light pollution handbook, Astrophysics and Space Science Library (Dordrecht, The Netherlands: Springer), 2004, 322: 118–132, Bibcode:2004ASSL..322.....N, ISBN 1-4020-2665-X, doi:10.1007/978-1-4020-2666-9.
↑  Kanas, Nick. . Springer. 2007. ISBN 0387716688.
↑  坎农, 安妮; 皮克林, 爱德华·查尔斯, , 哈佛大学天文台, 1918, 91: 1–290, Bibcode:1918AnHar..91....1C. —see p. 236
↑  Belkora, Leila. . CRC Press. 2002. ISBN 0750307307.
↑  吉尔, 戴维; Elkin, W. L., , London, UK: The Royal Astronomical Society: 174–180, 1884.
↑  Gill, David. . London: Eyre and Spottiswoode. 1893.
↑  Gill, David. . Nature. 1884, 30: 156–159.
↑  亚当斯, 沃尔特; 乔伊, 阿尔弗雷德·哈里逊, , The Astrophysical Journal, 1917, 46: 313–339, Bibcode:1917ApJ....46..313A, doi:10.1086/142369.
↑  Heidmann, Jean; Dunlop, Storm, , Cambridge, U.K.: Cambridge University Press: 113, 1995, ISBN 0-521-58563-5.
↑  Duquennoy, A.;  et al, , Progress in the Search for Extraterrestrial Life, Astronomical Society of the Pacific Conference Series (Santa Cruz, California: 太平洋天文学会), August 16–20, 1993, 74: 207–218, Bibcode:1995ASPC...74..207H.
↑  Whitehouse, David. . BBC News. 2004-03-25  [2008-07-22]. （原始内容存档于2007-11-18）.
↑  van de Kamp, P. . Astronomical Journal. 1974, 79: 491–492  [2008-07-28]. （原始内容存档于2019-03-27）.
↑  Hatzes, Artie P.;  et al, , The Astrophysical Journal, December 2000, 544 (2): L145–L148, Bibcode:2000ApJ...544L.145H, arXiv:astro-ph/0009423 , doi:10.1086/317319.
↑  Greaves, Jane. . JAC/UCLA. 1998-07-08  [2008-07-28]. （原始内容存档于2006-05-03）.
↑  Benedict, G. Fritz;  et al, , The Astronomical Journal, November 2006, 132 (5): 2206–2218, Bibcode:2006AJ....132.2206B, arXiv:astro-ph/0610247 , doi:10.1086/508323.
↑  Valenti, Jeff A.; Marcy, Geoffrey W.; Basri, Gibor, , The Astrophysical Journal, February 1995, 439 (2): 939–956, Bibcode:1995ApJ...439..939V, doi:10.1086/175231.
1 2  Gray, David F.; Baliunas, Sallie L., , The Astrophysical Journal, March 1995, 441 (1): 436–442, Bibcode:1995ApJ...441..436G, doi:10.1086/175368.
↑  Froehlich, H.-E. . Astronomische Nachrichten. 2007, 328: 1037  [2008-07-25]. （原始内容存档于2017-01-18）.
↑  Drake, Jeremy J.; Smith, Geoffrey, , The Astrophysical Journal, August 1993, 412 (2): 797–809, Bibcode:1993ApJ...412..797D, doi:10.1086/172962.
↑  Gai, Ning; Bi, Shao-Lan; Tang, Yan-Ke, , Chinese Journal of Astronomy and Astrophysics, October 2008, 8 (5): 591–602, Bibcode:2008ChJAA...8..591G, arXiv:0806.1811 , doi:10.1088/1009-9271/8/5/10.
↑  Wood, Brian E.; Müller, Hans-Reinhard; Zank, Gary P.; Linsky, Jeffrey L., , The Astrophysical Journal, July 2002, 574 (1): 1–2, Bibcode:2002ApJ...574..412W, arXiv:astro-ph/0203437 , doi:10.1086/340797.  See p. 10.
↑  de Mello, G. F. Porto; del Peloso, E. F.; Ghezzi, Luan, , Astrobiology（英语：）, 2005, 6 (2): 308–331, Bibcode:2006AsBio...6..308P, PMID 16689649, arXiv:astro-ph/0511180 , doi:10.1089/ast.2006.6.308.
↑  Deltorn, J.-M.; Greene, P., Jayawardhana, Ray; Greene, Thoas , 编, , Young Stars Near Earth: Progress and Prospects 244 (San Francisco, CA: Astronomical Society of the Pacific), 2001-05-16, 244: 227–232, Bibcode:2001ASPC..244.....J, ISBN 1-58381-082-X, arXiv:astro-ph/0105284 .
↑  García-Sánchez, J.;  et al, , Astronomy and Astrophysics, November 2001, 379 (2): 634–659, Bibcode:2001A&A...379..634G, doi:10.1051/0004-6361:20011330.
1 2  . NASA/JPL-Caltech.   [2008-10-27]. （原始内容存档于2009-01-05）.
↑  Janson, M.;  et al, , Astronomy and Astrophysics, September 2008, 488 (2): 771–780, Bibcode:2008A&A...488..771J, arXiv:0807.0301 , doi:10.1051/0004-6361:200809984.
↑  Dole, Stephen H.,  1st, New York, N.Y.: Blaisdell Publishing Company: 110 & 113, 1964  [2008-07-22], ISBN 0-444-00092-5, （原始内容存档于2008-07-04）.
↑  Underwood, David R.; Jones, Barrie W.; Sleep, P. Nick, , International Journal of Astrobiology（英语：）, 2003, 2 (4): 289–299, Bibcode:2003IJAsB...2..289U, arXiv:astro-ph/0312522 , doi:10.1017/S1473550404001715.
↑  Jones, Barrie W.; Underwood, David R.; Sleep, P. Nick, , Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets (Heidelberg, Germany: Dordrecht, D. Reidel（英语：） Publishing Co), April 22–25, 2003, 539: 625–630, Bibcode:2003ESASP.539..625J, ISBN 92-9092-849-2, arXiv:astro-ph/0305500 .
1 2  Davis, G. R.;  et al, , The Astrophysical Journal, February 2005, 619 (2): L187–L190, Bibcode:2005ApJ...619L.187G, arXiv:astro-ph/0208279 , doi:10.1086/428348.
↑  McCarthy, Chris. . Exoplanets Group, San Francisco State University. 2008  [2008-07-22]. （原始内容存档于2007-08-10）.
↑  Greaves, J. S.;  et al, , The Astrophysical Journal, October 1998, 506 (2): L133–L137, Bibcode:1998ApJ...506L.133G, arXiv:astro-ph/9808224 , doi:10.1086/311652.
↑  Ozernoy, Leonid M.; Gorkavyi, Nick N.; Mather, John C.; Taidakova, Tanya A., , The Astrophysical Journal Letters, July 2000, 537 (2): L147–L151, Bibcode:2000ApJ...537L.147O, arXiv:astro-ph/0007014 , doi:10.1086/312779.
↑  Quillen, A. C.; Thorndike, Stephen, , The Astrophysical Journal, October 2002, 578 (2): L149–L142, Bibcode:2002ApJ...578L.149Q, arXiv:astro-ph/0208279 , doi:10.1086/344708.