Betelgeuse (Basque Wikipedia)

Analysis of information sources in references of the Wikipedia article "Betelgeuse" in Basque language version.

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31harvard.edu

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aavso.org

Davis, Kate. (December 2000). Variable Star of the Month: Alpha Orionis. American Association of Variable Star Observers (AAVSO).

abc.net.au

Iorio, Kelsie. (27 December 2019). «Is Betelgeuse, the red giant star in the constellation Orion, going to explode?» ABC News.

astronomerstelegram.org

Guinan, Edward F.; Wasatonic, Richard J.; Calderwood, Thomas J.. (23 December 2019). «ATel #13365 - Updates on the "Fainting" of Betelgeuse» The Astronomer's Telegram. Aipuaren errorea: Invalid <ref> tag; name "AT-20191223" defined multiple times with different content
Guinan, Edward F.; Wasatonic, Richard J.. (1 February 2020). «ATel #13439 Betelgeuse Updates – 1 February 2020; 23:20 UT» The Astronomer's Telegram.
Guinan, Edward; Wasatonic, Richard; Calderwood, Thomas; Carona, Donald. (22 February 2020). «ATel #13512 – The Fall and Rise in Brightness of Betelgeuse» The Astronomer's Telegram.
Gehrz, R.D.. (24 February 2020). «ATel #13518 – Betelgeuse remains steadfast in the infrared» The Astronomer's Telegram.
Sigismondi, Costantino. (31 March 2020). «ATel #13601 – Rapid rising of Betelgeuse's luminosity» The Astronomer's Telegram.
Andrea Dupree; Edward Guinan; William T. Thompson. (28 July 2020). Photometry of Betelgeuse with the STEREO Mission While in the Glare of the Sun from Earth. Astronomer's Telegram.
Sigismondi, Costantino. (30 August 2020). «ATel #13982: Second dust cloud on Betelgeuse» The Astronomer's Telegram.

astronomy.com

Carlson, Erika K.. (27 December 2019). «Betelguese's bizarre dimming has astronomers scratching their heads» Astronomy.

berkeley.edu

Sanders, Robert. (9 June 2009). «Red Giant Star Betelgeuse Mysteriously Shrinking» UC Berkeley News (UC Berkeley).

cnet.com

Erick Mack. (2019-12-27). «Betelgeuse star acting like it's about to explode, even if the odds say it isn't» CNET.

cornell.edu

astro.cornell.edu

Bernat, David. (2008). «Aperture masking interferometry» Ask An Astronomer (Cornell University Astronomy).

doi.org

dx.doi.org

Lobel, Alex; Dupree, Andrea K.. (2000). «Modeling the Variable Chromosphere of α Orionis» (PDF) The Astrophysical Journal, 545 (1): 454–74. doi:10.1086/317784. Bibcode: 2000ApJ...545..454L..
Harper, Graham M.; Brown, Alexander; Lim, Jeremy. (2001). «A Spatially Resolved, Semiempirical Model for the Extended Atmosphere of α Orionis (M2 Iab)» The Astrophysical Journal, Volume 551, Issue 2, pp. 1073-1098. 551 (2): 1073–1098. doi:10.1086/320215. Bibcode: 2001ApJ...551.1073H..
Ramírez, Solange V.. (2000). «Stellar Iron Abundances at the Galactic Center» (PDF) The Astrophysical Journal, 537 (1): 205–20. doi:10.1086/309022. Bibcode: 2000ApJ...537..205R..
Michelson, A.A.; Pease, F.G.. (1921). «Measurement of the diameter of Alpha Orionis with the interferometer» Astrophysical Journal 53 (5): 249–259. doi:10.1086/142603. Bibcode: 1921ApJ....53..249M..
Bonneau, D.; Labeyrie, A.. (1973). «Speckle interferometry: Color-dependent limb darkening evidenced on Alpha Orionis and Omicron Ceti» Astrophysical Journal 181: L1. doi:10.1086/181171. Bibcode: 1973ApJ...181L...1B..
Sutton, E.C.; Storey, J.W.V.; Betz, A.L.; Townes, C.H.; Spears, D.L.. (1977). «Spatial heterodyne tnterferometry of VY Canis Majoris, Alpha Orionis, Alpha Scorpii, and R Leonis at 11 microns» Astrophysical Journal Letters 217: L97–L100. doi:10.1086/182547. Bibcode: 1977ApJ...217L..97S..
Bernat, A.P.; Lambert, D.L.. (November 1975). «Observations of the circumstellar gas shells around Betelgeuse and Antares» Astrophysical Journal 201: L153–L156. doi:10.1086/181964. Bibcode: 1975ApJ...201L.153B..
Dyck, H.M.; Simon, T.. (February 1975). «Circumstellar dust shell models for Alpha Orionis» Astrophysical Journal 195: 689–693. doi:10.1086/153369. Bibcode: 1975ApJ...195..689D..
Boesgaard, A.M.; Magnan, C.. (June 1975). «The circumstellar shell of alpha Orionis from a study of the Fe II emission lines» Astrophysical Journal 198 (1): 369–371, 373–378. doi:10.1086/153612. Bibcode: 1975ApJ...198..369B..
Wilson, R.W.; Dhillon, V.S.; Haniff, C.A.. (1997). «The changing face of Betelgeuse» Monthly Notices of the Royal Astronomical Society 291 (4): 819. doi:10.1093/mnras/291.4.819. Bibcode: 1997MNRAS.291..819W..
Burns, D.; Baldwin, J.E.; Boysen, R.C.; Haniff, C.A.; Lawson, P.R.; MacKay, C.D.; Rogers, J.; Scott, T.R. et al.. (September 1997). «The surface structure and limb-darkening profile of Betelgeuse» Monthly Notices of the Royal Astronomical Society 290 (1): L11–L16. doi:10.1093/mnras/290.1.l11. Bibcode: 1997MNRAS.290L..11B..
Tuthill P.G.; Haniff, C.A.; Baldwin, J.E.. (March 1997). «Hotspots on late-type supergiants» Monthly Notices of the Royal Astronomical Society 285 (3): 529–39. doi:10.1093/mnras/285.3.529. Bibcode: 1997MNRAS.285..529T..
Schwarzschild, Martin. (1975). «On the scale of Pphotospheric convection in red giants and supergiants» Astrophysical Journal 195 (1): 137–44. doi:10.1086/153313. Bibcode: 1975ApJ...195..137S..
Gilliland, Ronald L.; Dupree, Andrea K.. (May 1996). «First image of the surface of a star with the Hubble Space Telescope» Astrophysical Journal Letters 463 (1): L29. doi:10.1086/310043. Bibcode: 1996ApJ...463L..29G..
Uitenbroek, Han; Dupree, Andrea K.; Gilliland, Ronald L.. (1998). «Spatially Resolved Hubble Space Telescope Spectra of the Chromosphere of α Orionis» The Astronomical Journal 116 (5): 2501–2512. doi:10.1086/300596. Bibcode: 1998AJ....116.2501U..
Weiner, J.; Danchi, W.C.; Hale, D.D.S.; McMahon, J.; Townes, C.H.; Monnier, J.D.; Tuthill, P.G.. (December 2000). «Precision measurements of the diameters of α Orionis and ο Ceti at 11 microns» The Astrophysical Journal 544 (2): 1097–1100. doi:10.1086/317264. Bibcode: 2000ApJ...544.1097W..
Townes, C. H.; Wishnow, E. H.; Hale, D. D. S.; Walp, B.. (2009). «A Systematic Change with Time in the Size of Betelgeuse» The Astrophysical Journal Letters 697 (2): L127–28. doi:10.1088/0004-637X/697/2/L127. Bibcode: 2009ApJ...697L.127T..
Bernat, Andrew P.. (1977). «The circumstellar shells and mass-loss rates of four M supergiants» Astrophysical Journal 213: 756–66. doi:10.1086/155205. Bibcode: 1977ApJ...213..756B..
Kervella, P.; Verhoelst, T.; Ridgway, S.T.; Perrin, G.; Lacour, S.; Cami, J.; Haubois, X.. (September 2009). «The close circumstellar environment of Betelgeuse. Adaptive optics spectro-imaging in the near-IR with VLT/NACO» Astronomy and Astrophysics 504 (1): 115–25. doi:10.1051/0004-6361/200912521. Bibcode: 2009A&A...504..115K..
Dupree, Adrea K.. (13 August 2020). «Spatially resolved ultraviolet spectroscopy of the great dimming of Betelgeuse» The Astrophysical Journal 8991: 68. doi:10.3847/1538-4357/aba516. Bibcode: 2020ApJ...899...68D..
Levesque, Emily M.; Massey, Philip. (24 February 2020). «Betelgeuse just isn't that cool: Effective temperature alone cannot explain the recent dimming of Betelgeuse» The Astrophysical Journal Letters 891 (2) doi:10.3847/2041-8213/ab7935. Bibcode: 2020ApJ...891L..37L..
Dharmawardena, Thavisha E.; Mairs, Steve; Scicluna, Peter; Bell, Graham; McDonald, Iain; Menten, Karl; Weiss, Axel; Zijlstra, Albert. (2020-06-29). «Betelgeuse fainter in the submillimeter too: An analysis of JCMT and APEX monitoring during the recent optical minimum» The Astrophysical Journal 897 (1): L9. doi:10.3847/2041-8213/ab9ca6. ISSN 2041-8213. Bibcode: 2020ApJ...897L...9D..
«A dusty veil shading Betelgeuse during its Great Dimming» Nature 594 (7863): 365–368. 16 June 2021 doi:10.1038/s41586-021-03546-8. PMID 34135524. Bibcode: 2021Natur.594..365M..
«Great Dimming of Betelgeuse explained» Nature 594 (7863): 343–344. 16 June 2021 doi:10.1038/d41586-021-01526-6. PMID 34135515. Bibcode: 2021Natur.594..343L..
(Ingelesez) Alexeeva, Sofya; Zhao, Gang; Gao, Dong-Yang; Du, Junju; Li, Aigen; Li, Kai; Hu, Shaoming. (2021-08-05). «Spectroscopic evidence for a large spot on the dimming Betelgeuse» Nature Communications 12 (1): 4719. doi:10.1038/s41467-021-25018-3. ISSN 2041-1723. OCLC .8342547 PMID 34354072. Bibcode: 2021NatCo..12.4719A..
(Ingelesez) Goldberg, L.. (May 1984). «The variability of alpha Orionis» Publications of the Astronomical Society of the Pacific 96: 366. doi:10.1086/131347. ISSN 0004-6280. Bibcode: 1984PASP...96..366G..

earthsky.org

Byrd, Deborah. (2019-12-23). «Betelgeuse is 'fainting' but (probably) not about to explode» Earth & Sky. Aipuaren errorea: Invalid <ref> tag; name "earthsky" defined multiple times with different content

forbes.com

Bruce Dorminey. (17 February 2020). «Betelgeuse Has Finally Stopped Dimming, Says Astronomer» Forbes.

harvard.edu

adsabs.harvard.edu

Nicolet, B.. (1978). «Catalogue of homogeneous data in the UBV photoelectric photometric system» Astronomy and Astrophysics 34: 1–49. Bibcode: 1978A&AS...34....1N..
Lobel, Alex; Dupree, Andrea K.. (2000). «Modeling the Variable Chromosphere of α Orionis» (PDF) The Astrophysical Journal, 545 (1): 454–74. doi:10.1086/317784. Bibcode: 2000ApJ...545..454L..
Harper, Graham M.; Brown, Alexander; Lim, Jeremy. (2001). «A Spatially Resolved, Semiempirical Model for the Extended Atmosphere of α Orionis (M2 Iab)» The Astrophysical Journal, Volume 551, Issue 2, pp. 1073-1098. 551 (2): 1073–1098. doi:10.1086/320215. Bibcode: 2001ApJ...551.1073H..
Ramírez, Solange V.. (2000). «Stellar Iron Abundances at the Galactic Center» (PDF) The Astrophysical Journal, 537 (1): 205–20. doi:10.1086/309022. Bibcode: 2000ApJ...537..205R..
Wilk, Stephen R.. (1999). «Further Mythological Evidence for Ancient Knowledge of Variable Stars» The Journal of the American Association of Variable Star Observers 27 (2): 171–74. Bibcode: 1999JAVSO..27..171W..
Michelson, A.A.; Pease, F.G.. (1921). «Measurement of the diameter of Alpha Orionis with the interferometer» Astrophysical Journal 53 (5): 249–259. doi:10.1086/142603. Bibcode: 1921ApJ....53..249M..
Labeyrie, A.. (May 1970). «Attainment of diffraction-limited resolution in large telescopes by Fourier analysing speckle patterns in star images» Astronomy and Astrophysics 6: 85. Bibcode: 1970A&A.....6...85L..
Bonneau, D.; Labeyrie, A.. (1973). «Speckle interferometry: Color-dependent limb darkening evidenced on Alpha Orionis and Omicron Ceti» Astrophysical Journal 181: L1. doi:10.1086/181171. Bibcode: 1973ApJ...181L...1B..
Sutton, E.C.; Storey, J.W.V.; Betz, A.L.; Townes, C.H.; Spears, D.L.. (1977). «Spatial heterodyne tnterferometry of VY Canis Majoris, Alpha Orionis, Alpha Scorpii, and R Leonis at 11 microns» Astrophysical Journal Letters 217: L97–L100. doi:10.1086/182547. Bibcode: 1977ApJ...217L..97S..
Bernat, A.P.; Lambert, D.L.. (November 1975). «Observations of the circumstellar gas shells around Betelgeuse and Antares» Astrophysical Journal 201: L153–L156. doi:10.1086/181964. Bibcode: 1975ApJ...201L.153B..
Dyck, H.M.; Simon, T.. (February 1975). «Circumstellar dust shell models for Alpha Orionis» Astrophysical Journal 195: 689–693. doi:10.1086/153369. Bibcode: 1975ApJ...195..689D..
Boesgaard, A.M.; Magnan, C.. (June 1975). «The circumstellar shell of alpha Orionis from a study of the Fe II emission lines» Astrophysical Journal 198 (1): 369–371, 373–378. doi:10.1086/153612. Bibcode: 1975ApJ...198..369B..
Buscher, D.F.; Baldwin, J.E.; Warner, P.J.; Haniff, C.A.. (1990). «Detection of a bright feature on the surface of Betelgeuse» Monthly Notices of the Royal Astronomical Society 245: 7. Bibcode: 1990MNRAS.245P...7B..
Wilson, R.W.; Dhillon, V.S.; Haniff, C.A.. (1997). «The changing face of Betelgeuse» Monthly Notices of the Royal Astronomical Society 291 (4): 819. doi:10.1093/mnras/291.4.819. Bibcode: 1997MNRAS.291..819W..
Burns, D.; Baldwin, J.E.; Boysen, R.C.; Haniff, C.A.; Lawson, P.R.; MacKay, C.D.; Rogers, J.; Scott, T.R. et al.. (September 1997). «The surface structure and limb-darkening profile of Betelgeuse» Monthly Notices of the Royal Astronomical Society 290 (1): L11–L16. doi:10.1093/mnras/290.1.l11. Bibcode: 1997MNRAS.290L..11B..
Tuthill P.G.; Haniff, C.A.; Baldwin, J.E.. (March 1997). «Hotspots on late-type supergiants» Monthly Notices of the Royal Astronomical Society 285 (3): 529–39. doi:10.1093/mnras/285.3.529. Bibcode: 1997MNRAS.285..529T..
Schwarzschild, Martin. (1975). «On the scale of Pphotospheric convection in red giants and supergiants» Astrophysical Journal 195 (1): 137–44. doi:10.1086/153313. Bibcode: 1975ApJ...195..137S..
Gilliland, Ronald L.; Dupree, Andrea K.. (May 1996). «First image of the surface of a star with the Hubble Space Telescope» Astrophysical Journal Letters 463 (1): L29. doi:10.1086/310043. Bibcode: 1996ApJ...463L..29G..
Uitenbroek, Han; Dupree, Andrea K.; Gilliland, Ronald L.. (1998). «Spatially Resolved Hubble Space Telescope Spectra of the Chromosphere of α Orionis» The Astronomical Journal 116 (5): 2501–2512. doi:10.1086/300596. Bibcode: 1998AJ....116.2501U..
Weiner, J.; Danchi, W.C.; Hale, D.D.S.; McMahon, J.; Townes, C.H.; Monnier, J.D.; Tuthill, P.G.. (December 2000). «Precision measurements of the diameters of α Orionis and ο Ceti at 11 microns» The Astrophysical Journal 544 (2): 1097–1100. doi:10.1086/317264. Bibcode: 2000ApJ...544.1097W..
Townes, C. H.; Wishnow, E. H.; Hale, D. D. S.; Walp, B.. (2009). «A Systematic Change with Time in the Size of Betelgeuse» The Astrophysical Journal Letters 697 (2): L127–28. doi:10.1088/0004-637X/697/2/L127. Bibcode: 2009ApJ...697L.127T..
Ravi, V.; Wishnow, E.; Lockwood, S.; Townes, C.. (December 2011). «The many faces of Betelgeuse» Astronomical Society of the Pacific 448: 1025. Bibcode: 2011ASPC..448.1025R..
Bernat, Andrew P.. (1977). «The circumstellar shells and mass-loss rates of four M supergiants» Astrophysical Journal 213: 756–66. doi:10.1086/155205. Bibcode: 1977ApJ...213..756B..
Kervella, P.; Verhoelst, T.; Ridgway, S.T.; Perrin, G.; Lacour, S.; Cami, J.; Haubois, X.. (September 2009). «The close circumstellar environment of Betelgeuse. Adaptive optics spectro-imaging in the near-IR with VLT/NACO» Astronomy and Astrophysics 504 (1): 115–25. doi:10.1051/0004-6361/200912521. Bibcode: 2009A&A...504..115K..
Dupree, Adrea K.. (13 August 2020). «Spatially resolved ultraviolet spectroscopy of the great dimming of Betelgeuse» The Astrophysical Journal 8991: 68. doi:10.3847/1538-4357/aba516. Bibcode: 2020ApJ...899...68D..
Levesque, Emily M.; Massey, Philip. (24 February 2020). «Betelgeuse just isn't that cool: Effective temperature alone cannot explain the recent dimming of Betelgeuse» The Astrophysical Journal Letters 891 (2) doi:10.3847/2041-8213/ab7935. Bibcode: 2020ApJ...891L..37L..
Dharmawardena, Thavisha E.; Mairs, Steve; Scicluna, Peter; Bell, Graham; McDonald, Iain; Menten, Karl; Weiss, Axel; Zijlstra, Albert. (2020-06-29). «Betelgeuse fainter in the submillimeter too: An analysis of JCMT and APEX monitoring during the recent optical minimum» The Astrophysical Journal 897 (1): L9. doi:10.3847/2041-8213/ab9ca6. ISSN 2041-8213. Bibcode: 2020ApJ...897L...9D..
«A dusty veil shading Betelgeuse during its Great Dimming» Nature 594 (7863): 365–368. 16 June 2021 doi:10.1038/s41586-021-03546-8. PMID 34135524. Bibcode: 2021Natur.594..365M..
«Great Dimming of Betelgeuse explained» Nature 594 (7863): 343–344. 16 June 2021 doi:10.1038/d41586-021-01526-6. PMID 34135515. Bibcode: 2021Natur.594..343L..
(Ingelesez) Alexeeva, Sofya; Zhao, Gang; Gao, Dong-Yang; Du, Junju; Li, Aigen; Li, Kai; Hu, Shaoming. (2021-08-05). «Spectroscopic evidence for a large spot on the dimming Betelgeuse» Nature Communications 12 (1): 4719. doi:10.1038/s41467-021-25018-3. ISSN 2041-1723. OCLC .8342547 PMID 34354072. Bibcode: 2021NatCo..12.4719A..
(Ingelesez) Goldberg, L.. (May 1984). «The variability of alpha Orionis» Publications of the Astronomical Society of the Pacific 96: 366. doi:10.1086/131347. ISSN 0004-6280. Bibcode: 1984PASP...96..366G..

ianridpath.com

Ridpath, Ian. «Orion: the meaning of Betelgeuse» Star Tales.

iau.org

IAU Working Group on Star Names (WGSN). International Astronomical Union (IAU).

independent.co.uk

Andrew Griffin. (29 December 2019). «Betelgeuse: Star Is Behaving Strangely And Could Be About To Explode Into A Supernova, Say Astronomers» The Independent.

iop.org

iopscience.iop.org

Lobel, Alex; Dupree, Andrea K.. (2000). «Modeling the Variable Chromosphere of α Orionis» (PDF) The Astrophysical Journal, 545 (1): 454–74. doi:10.1086/317784. Bibcode: 2000ApJ...545..454L..
Ramírez, Solange V.. (2000). «Stellar Iron Abundances at the Galactic Center» (PDF) The Astrophysical Journal, 537 (1): 205–20. doi:10.1086/309022. Bibcode: 2000ApJ...537..205R..

nasa.gov

Garner, Rob. (2020-08-13). «Hubble Finds Betelgeuse's Mysterious Dimming Due to Traumatic Outburst» NASA.

nationalgeographic.com

Drake, Nadia. (26 December 2019). «A giant star is acting strange, and astronomers are buzzing» National Geographic Society.

nature.com

astronomycommunity.nature.com

«Imaging the Great Dimming of Betelgeuse» Nature 16 June 2021.

nih.gov

ncbi.nlm.nih.gov

«A dusty veil shading Betelgeuse during its Great Dimming» Nature 594 (7863): 365–368. 16 June 2021 doi:10.1038/s41586-021-03546-8. PMID 34135524. Bibcode: 2021Natur.594..365M..
«Great Dimming of Betelgeuse explained» Nature 594 (7863): 343–344. 16 June 2021 doi:10.1038/d41586-021-01526-6. PMID 34135515. Bibcode: 2021Natur.594..343L..
(Ingelesez) Alexeeva, Sofya; Zhao, Gang; Gao, Dong-Yang; Du, Junju; Li, Aigen; Li, Kai; Hu, Shaoming. (2021-08-05). «Spectroscopic evidence for a large spot on the dimming Betelgeuse» Nature Communications 12 (1): 4719. doi:10.1038/s41467-021-25018-3. ISSN 2041-1723. OCLC .8342547 PMID 34354072. Bibcode: 2021NatCo..12.4719A..

pubmedcentral.nih.gov

Allen, Richard Hinckley. (1963). Star names : their lore and meaning. (Dover ed. argitaraldia) Dover Publications ISBN 0-486-21079-0. PMC 637940. (Noiz kontsultatua: 2022-10-29).

nypost.com

Sparks, Hannah. (26 December 2019). «Massive 'Betelgeuse' star in Orion constellation due for explosive supernova» New York Post.

nytimes.com

Overbye, Dennis. (14 August 2020). «This star looked like it would explode. Maybe it just sneezed» The New York Times.
Overbye, Dennis. (17 June 2021). «Betelgeuse Merely Burped, Astronomers Conclude – The dramatic dimming of the red supergiant in 2019 was the product of dust, not a prelude to destruction, a new study has found.» The New York Times.

physicsworld.com

(Ingelesez) Harris, Margaret. (2021-08-06). «New evidence supports dark-spot theory for Betelgeuse's 'Great Dimming'» Physics World.
(Ingelesez) «How Betelgeuse blew its top and lost its rhythm» Physics World 2022-08-22.

rochester.edu

pas.rochester.edu

sonoma.edu

phys-astro.sonoma.edu

Tenn, Joseph S.. (June 2009). Martin Schwarzschild 1965. Astronomical Society of the Pacific (ASP).

thewalrus.ca

Boutsalis, Kelly. (10 August 2020). «Teaching Indigenous Star Stories» The Walrus (The Walrus).

washingtonpost.com

Kaplan, Sarah. (27 December 2019v). «Is Betelgeuse, one of the sky's brightest stars, on the brink of a supernova?» The Washington Post.

wolframalpha.com

{{erreferentzia |izenburua=Betelgeuse |egilea=Wolfram Alpha |url=http://www.wolframalpha.com/input/?i=betelgeuse |data=2009-5-18

worldcat.org

Allen, Richard Hinckley. (1963). Star names : their lore and meaning. (Dover ed. argitaraldia) Dover Publications ISBN 0-486-21079-0. PMC 637940. (Noiz kontsultatua: 2022-10-29).
Dharmawardena, Thavisha E.; Mairs, Steve; Scicluna, Peter; Bell, Graham; McDonald, Iain; Menten, Karl; Weiss, Axel; Zijlstra, Albert. (2020-06-29). «Betelgeuse fainter in the submillimeter too: An analysis of JCMT and APEX monitoring during the recent optical minimum» The Astrophysical Journal 897 (1): L9. doi:10.3847/2041-8213/ab9ca6. ISSN 2041-8213. Bibcode: 2020ApJ...897L...9D..
(Ingelesez) Alexeeva, Sofya; Zhao, Gang; Gao, Dong-Yang; Du, Junju; Li, Aigen; Li, Kai; Hu, Shaoming. (2021-08-05). «Spectroscopic evidence for a large spot on the dimming Betelgeuse» Nature Communications 12 (1): 4719. doi:10.1038/s41467-021-25018-3. ISSN 2041-1723. OCLC .8342547 PMID 34354072. Bibcode: 2021NatCo..12.4719A..
(Ingelesez) Goldberg, L.. (May 1984). «The variability of alpha Orionis» Publications of the Astronomical Society of the Pacific 96: 366. doi:10.1086/131347. ISSN 0004-6280. Bibcode: 1984PASP...96..366G..