While supergiants are typically defined as stars with luminosity classesIa, Iab or Ib, other definitions exist, such as those based on stellar evolution.[1] Therefore, stars with other luminosity classes can sometimes be considered supergiants.
↑Using Alpha Aquarii's measured angular diameter at 3.066±0.036milliarcseconds (mas),[53] together with its distance to Earth of 211.9 parsecs (or 691 light-years),[20] its physical size can be calculated. It is divided by 0.0046491 to convert to AU from 2 R☉, and the given value is divided by 2 to convert to the Sun's radius.
↑ 4.04.14.24.3Ducati, J. R. (2002-01-01). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system.". VizieR Online Data Catalog2237. Bibcode: 2002yCat.2237....0D.
↑ 6.06.16.26.3Moravveji, Ehsan; Guinan, Edward F.; Khosroshahi, Habib; Wasatonic, Rick (2013). "THE AGE AND MASS OF THE α HERCULIS TRIPLE-STAR SYSTEM FROM a MESA GRID OF ROTATING STARS WITH 1.3 ⩽ M / M☉⩽ 8.0". The Astronomical Journal146 (6): 148. doi:10.1088/0004-6256/146/6/148.
↑Moravveji, E.; Guinan, E. F.; Sobouti, Y. (2011). "On the Mass and Evolutionary Status of the Bright Red AGB Supergiant α1 Herculis". Why Galaxies Care About Agb Stars Ii: Shining Examples and Common Inhabitants445: 163. Bibcode: 2011ASPC..445..163M.
↑Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R. et al. (2020-01-01). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy and Astrophysics633: A34. doi:10.1051/0004-6361/201936360. ISSN0004-6361. Bibcode: 2020A&A...633A..34C.
↑ 12.012.112.2Neuhäuser, R; Torres, G; Mugrauer, M; Neuhäuser, D L; Chapman, J; Luge, D; Cosci, M (2022-07-29). "Colour evolution of Betelgeuse and Antares over two millennia, derived from historical records, as a new constraint on mass and age". Monthly Notices of the Royal Astronomical Society516 (1): 693–719. doi:10.1093/mnras/stac1969. ISSN0035-8711.
↑ 13.013.113.213.313.4Joyce, Meridith; Leung, Shing-Chi; Molnár, László; Ireland, Michael J.; Kobayashi, Chiaki; Nomoto, Ken'ichi (2020-10-13). "Standing on the shoulders of giants: New mass and distance estimates for Betelgeuse through combined evolutionary, asteroseismic, and hydrodynamical simulations with MESA". The Astrophysical Journal902 (1): 63. doi:10.3847/1538-4357/abb8db. ISSN1538-4357. Bibcode: 2020ApJ...902...63J.
↑Mittag, M.; Schröder, K. -P.; Perdelwitz, V.; Jack, D.; Schmitt, J. H. M. M. (2023-01-01), "Chromospheric activity and photospheric variation of α Ori during the great dimming event in 2020", Astronomy and Astrophysics669: A9, doi:10.1051/0004-6361/202244924, ISSN0004-6361, Bibcode: 2023A&A...669A...9M
↑Nicolet, B. (1978-10-01). "Catalogue of homogeneous data in the UBV photoelectric photometric system.". Astronomy and Astrophysics Supplement Series34: 1–49. ISSN0365-0138. Bibcode: 1978A&AS...34....1N.
↑Wielen, R. et al. (1999). "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions". Veröff. Astron. Rechen-Inst. Heidelb (Astronomisches Rechen-Institut Heidelberg) 35 (35): 1. Bibcode: 1999VeARI..35....1W.
↑ 20.020.120.220.320.420.520.620.7Bailer-Jones, C. A. L.; Rybizki, J.; Fouesneau, M.; Demleitner, M.; Andrae, R. (2021-03-01). "Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3". The Astronomical Journal161 (3): 147. doi:10.3847/1538-3881/abd806. ISSN0004-6256. Bibcode: 2021AJ....161..147B. Data about this star can be seen here.
↑Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022-01-01). "Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs". Astronomy and Astrophysics657: A7. doi:10.1051/0004-6361/202142146. ISSN0004-6361. Bibcode: 2022A&A...657A...7K.
↑ 22.022.1Jorissen, A.; Boffin, H. M. J.; Karinkuzhi, D.; Van Eck, S.; Escorza, A.; Shetye, S.; Van Winckel, H. (2019-06-01). "Barium and related stars, and their white-dwarf companions I. Giant stars". Astronomy & Astrophysics626: A127. doi:10.1051/0004-6361/201834630. ISSN0004-6361. Bibcode: 2019A&A...626A.127J.
↑ 24.024.124.2Evans, Nancy Remage; Schaefer, Gail H.; Gallenne, Alexandre; Torres, Guillermo; Horch, Elliott P.; Anderson, Richard I.; Monnier, John D.; Roettenbacher, Rachael M. et al. (2024-08-01). "The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array". The Astrophysical Journal971 (2): 190. doi:10.3847/1538-4357/ad5e7a. ISSN0004-637X. Bibcode: 2024ApJ...971..190E.
↑Lee, Byeong-Cheol; Mkrtichian, David E.; Han, Inwoo; Park, Myeong-Gu; Kim, Kang-Min (2008-06-01). "Precise Radial Velocities of Polaris: Detection of Amplitude Growth". The Astronomical Journal135 (6): 2240–2244. doi:10.1088/0004-6256/135/6/2240. ISSN0004-6256. Bibcode: 2008AJ....135.2240L.
↑Evans, Nancy Remage; Schaefer, Gail H.; Bond, Howard E.; Bono, Giuseppe; Karovska, Margarita; Nelan, Edmund; Sasselov, Dimitar; Mason, Brian D. (2008-09-01). "Direct Detection of the Close Companion of Polaris with the Hubble Space Telescope". The Astronomical Journal136 (3): 1137–1146. doi:10.1088/0004-6256/136/3/1137. ISSN0004-6256. Bibcode: 2008AJ....136.1137E.
↑ 29.029.1Bang, Tae-Yang; Lee, Byeong-Cheol; Choi, Yeon-Ho; Han, Inwoo; Park, Myeong-Gu (May 2025), "Periodic Low-amplitude Radial Velocity Variations in the Supergiant α Persei" (in en), The Astrophysical Journal985 (2): 176, doi:10.3847/1538-4357/adcc13, ISSN0004-637X, Bibcode: 2025ApJ...985..176B
↑Wade, Gregg; Oksala, Mary; Neiner, Coralie; Boucher, Etienne; Barron, James (2025). Magnetic field monitoring of four massive A-F supergiants.
↑ 31.031.131.231.3Baines, Ellyn K.; Armstrong, J. Thomas; Schmitt, Henrique R.; Zavala, R. T.; Benson, James A.; Hutter, Donald J.; Tycner, Christopher; Belle, Gerard T. van (2017-12-21). "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer". The Astronomical Journal155 (1): 30. doi:10.3847/1538-3881/aa9d8b. ISSN0004-6256. Bibcode: 2018AJ....155...30B.
↑ 32.032.1Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966-01-01). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory4: 99–110. Bibcode: 1966CoLPL...4...99J.
↑ 33.033.133.233.333.4Harper, Graham M.; Bennett, Philip D.; Brown, Alexander; Ayres, Thomas R.; Ohnaka, Keiichi; Griffin, Elizabeth (2022). "HST STIS Observations of ζ Aurigae A's Irradiated Atmosphere". The Astronomical Journal164 (1): 16. doi:10.3847/1538-3881/ac6feb. Bibcode: 2022AJ....164...16H.
↑Ruban, E. V.; Alekseeva, G. A.; Arkharov, A. A.; Hagen-Thorn, E. I.; Galkin, V. D.; Nikanorova, I. N.; Novikov, V. V.; Pakhomov, V. P. et al. (2006-09-01). "Spectrophotometric observations of variable stars". Astronomy Letters32 (9): 604–607. doi:10.1134/S1063773706090052. ISSN1063-7737. Bibcode: 2006AstL...32..604R.
↑Carpenter, Kenneth G. (1998). "The Structure of the Outer Atmosphere and Wind of lambda Vel". Asymptotic Giant Branch Stars191: 206. Bibcode: 1998IAUS..191P.206C.
↑ 36.036.1Ohnaka, Keiichi; Hofmann, Karl-Heinz; Schertl, Dieter; Weigelt, Gerd; Baffa, Carlo; Chelli, Alain; Petrov, Romain; Robbe-Dubois, Sylvie (July 2013). "High spectral resolution imaging of the dynamical atmosphere of the red supergiant Antares in the CO first overtone lines with VLTI/AMBER". Astronomy & Astrophysics555: A24. doi:10.1051/0004-6361/201321063. ISSN0004-6361. Bibcode: 2013A&A...555A..24O.
↑Mark J. Pecaut; Eric E. Mamajek; Eric J. Bubar (February 2012). "A Revised Age for Upper Scorpius and the Star Formation History among the F-type Members of the Scorpius-Centaurus OB Association". Astrophysical Journal746 (2): 154. doi:10.1088/0004-637X/746/2/154. Bibcode: 2012ApJ...746..154P.
↑Kiss, L. L.; Szabo, Gy M.; Bedding, T. R. (2006-11-11). "Variability in red supergiant stars: pulsations, long secondary periods and convection noise". Monthly Notices of the Royal Astronomical Society372 (4): 1721–1734. doi:10.1111/j.1365-2966.2006.10973.x. ISSN0035-8711. Bibcode: 2006MNRAS.372.1721K.
↑Benedict, G. Fritz; McArthur, Barbara E.; Feast, Michael W.; Barnes, Thomas G.; Harrison, Thomas E.; Bean, Jacob L.; Menzies, John W.; Chaboyer, Brian et al. (2011-12-01). "Distance Scale Zero-Points from Galactic RR Lyrae Star Parallaxes". The Astronomical Journal142 (6): 187. doi:10.1088/0004-6256/142/6/187. ISSN0004-6256. Bibcode: 2011AJ....142..187B.
↑ 41.041.1Pilecki, Bogumił; Gieren, Wolfgang; Pietrzyński, Grzegorz; Thompson, Ian B.; Smolec, Radosław; Graczyk, Dariusz; Taormina, Mónica; Udalski, Andrzej et al. (July 2018). "The Araucaria Project: High-precision Cepheid Astrophysics from the Analysis of Variables in Double-lined Eclipsing Binaries" (in en). The Astrophysical Journal862 (1): 43. doi:10.3847/1538-4357/aacb32. ISSN0004-637X.
↑Balog, Z.; Vinko, J.; Kaszas, G. (1997). "Baade-Wesselink Radius Determination of Type II Cepheids". Astronomical Journal113: 1833. doi:10.1086/118394. Bibcode: 1997AJ....113.1833B.
↑Feast, Michael W.; Laney, Cliford D.; Kinman, Thomas D.; van Leeuwen, Floor; Whitelock, Patricia A. (June 2008). "The Luminosities and Distance Scales of Type II Cepheid and RR Lyrae variables". Monthly Notices of the Royal Astronomical Society386 (4): 2115–2134. doi:10.1111/j.1365-2966.2008.13181.x. ISSN0035-8711. Bibcode: 2008MNRAS.386.2115F.
↑ 46.046.1Haucke, M.; Cidale, L. S.; Venero, R. O. J.; Curé, M.; Kraus, M.; Kanaan, S.; Arcos, C. (2018). "Wind properties of variable B supergiants. Evidence of pulsations connected with mass-loss episodes". Astronomy and Astrophysics614. doi:10.1051/0004-6361/201731678. Bibcode: 2018A&A...614A..91H.
↑Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971-12-01). "Four-color, H-beta and UBV photometry for bright B-type stars in the northern hemisphere.". The Astronomical Journal76: 1058–1071. doi:10.1086/111220. ISSN0004-6256. Bibcode: 1971AJ.....76.1058C.
↑Baines, Ellyn K.; Clark, James H.; Kingsley, Bradley I.; Schmitt, Henrique R.; Stone, Jordan M. (2025-05-07). "Vintage NPOI: New and Updated Angular Diameters for 145 Stars" (in en). The Astronomical Journal169 (6): 293. doi:10.3847/1538-3881/adc930. ISSN1538-3881. Bibcode: 2025AJ....169..293B.
↑ 53.053.153.2Baines, Ellyn K.; Clark, James H., III; Schmitt, Henrique R.; Stone, Jordan M.; von Braun, Kaspar (2023-12-01). "33 New Stellar Angular Diameters from the NPOI, and Nearly 180 NPOI Diameters as an Ensemble". The Astronomical Journal166 (6): 268. doi:10.3847/1538-3881/ad08be. ISSN0004-6256. Bibcode: 2023AJ....166..268B.
↑Cousins, A. W. J. (1984-01-01). "Standardisation of broad band photometry of equatorial standards.". South African Astronomical Observatory Circular8: 59–67. Bibcode: 1984SAAOC...8...59C.
↑De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V. Southern stars". Astronomy & Astrophysics561: A126. doi:10.1051/0004-6361/201220762. ISSN0004-6361. Bibcode: 2014A&A...561A.126D.
↑ 59.059.1Wielen, R.; Schwan, H.; Dettbarn, C.; Lenhardt, H.; Jahreiß, H.; Jährling, R. (1999-01-01). "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions.". Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg35: 1. Bibcode: 1999VeARI..35....1W.
↑Remie, H.; Lamers, H. J. G. L. M. (1982-01-01). "Effective temperatures, and radii of luminous O and B stars : a test for the accuracy of the model atmospheres.". Astronomy and Astrophysics105: 85–97. ISSN0004-6361. Bibcode: 1982A&A...105...85R.
↑Gray, R. O.; Garrison, R. F. (1989-07-01). "The Late A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation". The Astrophysical Journal Supplement Series70: 623. doi:10.1086/191349. ISSN0067-0049. Bibcode: 1989ApJS...70..623G.
↑ 65.065.1Neiner, Coralie; Oksala, Mary E.; Georgy, Cyril; Przybilla, Norbert; Mathis, Stéphane; Wade, Gregg; Kondrak, Matthias; Fossati, Luca et al. (2017-10-01). "Discovery of magnetic A supergiants: the descendants of magnetic main-sequence B stars". Monthly Notices of the Royal Astronomical Society471 (2): 1926–1935. doi:10.1093/mnras/stx1549. ISSN0035-8711. Bibcode: 2017MNRAS.471.1926N.
↑Houk, N. (1982-01-01). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0.. Bibcode: 1982mcts.book.....H.
↑Gutierrez-Moreno, A. (1966). "A system of photometric standards". Publications of the Department of Astronomy University of Chile1. Bibcode: 1966PDAUC...1....1G.
↑De Almeida, E S G.; Hugbart, M.; Domiciano De Souza, A.; Rivet, J-P; Vakili, F.; Siciak, A.; Labeyrie, G.; Garde, O. et al. (2022). "Combined spectroscopy and intensity interferometry to determine the distances of the blue supergiants P Cygni and Rigel". Monthly Notices of the Royal Astronomical Society515 (1): 1–12. doi:10.1093/mnras/stac1617. Bibcode: 2022MNRAS.515....1D.
↑Shultz, M.; Wade, G. A.; Petit, V.; Grunhut, J.; Neiner, C.; Hanes, D.; Collaboration, the MiMeS (2014-02-21). "An Observational Evaluation of Magnetic Confinement in the Winds of BA Supergiants". Monthly Notices of the Royal Astronomical Society438 (2): 1114–1126. doi:10.1093/mnras/stt2260. ISSN0035-8711. Bibcode: 2014MNRAS.438.1114S.
↑Moravveji, Ehsan; Guinan, Edward F.; Shultz, Matt; Williamson, Michael H.; Moya, Andres (2012). "Asteroseismology of the nearby SN-II Progenitor: Rigel. Part I. The MOST High-precision Photometry and Radial Velocity Monitoring". The Astrophysical Journal747 (1): 108–115. doi:10.1088/0004-637X/747/2/108. Bibcode: 2012ApJ...747..108M.
↑Guinan, Edward F.; Eaton, J. A.; Wasatonic, R.; Stewart, H.; Engle, S. G.; McCook, G. P. (2009-11-01). "Times-Series Photometry & Spectroscopy of the Bright Blue Supergiant Rigel: Probing the Atmosphere and Interior of a SN II Progenitor" (in en). Proceedings of the International Astronomical Union5 (H15): 359. doi:10.1017/S1743921310009798. ISSN1743-9221.
↑ 77.077.1Harper, G. M.; Griffin, R. E. M.; Bennett, P. D.; O'Riain, N. (2016-02-01). "Orbitally modulated photoexcited Si I emission in the eclipsing composite-spectrum binary ζ Aurigae". Monthly Notices of the Royal Astronomical Society456 (2): 1346–1358. doi:10.1093/mnras/stv2668. ISSN0035-8711. Bibcode: 2016MNRAS.456.1346H.
↑ 81.081.181.2Rosas-Portilla, F.; Schröder, K.-P.; Jack, D. (2022-04-26). "On the physical nature of the Wilson-Bappu effect: revising the gravity and temperature dependence". Monthly Notices of the Royal Astronomical Society513 (1): 906–924. doi:10.1093/mnras/stac929. ISSN0035-8711.
↑Benedict, G. Fritz; McArthur, B. E.; Fredrick, L. W.; Harrison, T. E.; Slesnick, C. L.; Rhee, J.; Patterson, R. J.; Skrutskie, M. F. et al. (September 2002). "Astrometry with Hubble Space Telescope: A Parallax of the Fundamental Distance Calibrator delta Cephei". The Astronomical Journal124 (3): 1695–1705. doi:10.1086/342014. Bibcode: 2002AJ....124.1695B.
↑Engle, Scott G.; Guinan, Edward F.; Harper, Graham M.; Neilson, Hilding R.; Evans, Nancy Remage (2014-09-25). "The Secret Lives of Cepheids: Evolutionary Changes and Pulsation-Induced Shock Heating in the Prototype Classical Cepheid {\delta} Cep". The Astrophysical Journal794 (1): 80. doi:10.1088/0004-637X/794/1/80. ISSN1538-4357.
↑ 92.092.192.2Baines, Ellyn K.; Armstrong, J. Thomas; Clark III, James H.; Gorney, Jim; Hutter, Donald J.; Jorgensen, Anders M.; Kyte, Casey; Mozurkewich, David et al. (2021-11-01). "Angular Diameters and Fundamental Parameters of Forty-Four Stars from the Navy Precision Optical Interferometer". The Astronomical Journal162 (5): 198. doi:10.3847/1538-3881/ac2431. ISSN0004-6256. Bibcode: 2021AJ....162..198B.
↑Nardetto, N.; Hocdé, V.; Kervella, P.; Gallenne, A.; Gieren, W.; Graczyk, D.; Merand, A.; Rainer, M. et al. (2024-04-01). "The orbital parameters of the δ Cep inner binary system determined using 2019 HARPS-N spectroscopic data". Astronomy and Astrophysics684: L9. doi:10.1051/0004-6361/202449600. ISSN0004-6361. Bibcode: 2024A&A...684L...9N.
↑Machado, L. N.; Abe, K.; Hayato, Y.; Hiraide, K.; Ieki, K.; Ikeda, M.; Kameda, J.; Kanemura, Y. et al. (2022-08-01). "Pre-supernova Alert System for Super-Kamiokande". The Astrophysical Journal935 (1): 40. doi:10.3847/1538-4357/ac7f9c. ISSN0004-637X. Bibcode: 2022ApJ...935...40M.
↑Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (August 2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought". The Astrophysical Journal628 (2): 973–985. doi:10.1086/430901. ISSN0004-637X. Bibcode: 2005ApJ...628..973L.
↑De Medeiros, J. R.; Udry, S.; Burki, G.; Mayor, M. (2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics395: 97–98. doi:10.1051/0004-6361:20021214. Bibcode: 2002A&A...395...97D.
↑McArthur, Barbara E.; Benedict, G. Fritz; Harrison, Thomas E.; van Altena, William (2011-05-01). "Astrometry with the Hubble Space Telescope: Trigonometric Parallaxes of Selected Hyads". The Astronomical Journal141 (5): 172. doi:10.1088/0004-6256/141/5/172. ISSN0004-6256. Bibcode: 2011AJ....141..172M.
↑Turner, David G. (April 2010), "The PL calibration for Milky Way Cepheids and its implications for the distance scale", Astrophysics and Space Science326 (2): 219–231, doi:10.1007/s10509-009-0258-5, Bibcode: 2010Ap&SS.326..219T
↑Sota, A.; Apellániz, J. Maíz; Walborn, N. R.; Alfaro, E. J.; Barbá, R. H.; Morrell, N. I.; Gamen, R. C.; Arias, J. I. (2011-04-01). "The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-Violet at R~2500". The Astrophysical Journal Supplement Series193 (2): 24. doi:10.1088/0067-0049/193/2/24. ISSN0067-0049. Bibcode: 2011ApJS..193...24S.