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User:Xterminal1/List of largest known stars 2

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This is the second version of Xterminal1's list of largest known stars above 100 R☉. As of 19 Jun 2024, this list is incomplete, and more stars will be included.

A star is an astronomical object that produces energy via nuclear fusion. White dwarfs, brown dwarfs, sub-brown dwarfs, neutron stars, hypothetical black dwarfs, and other similar hypothetical objects are not listed in this page as they fail to meet the definition of a star.

The solar radius is used to clearly compare the sizes of numerous stars. Roughly speaking, 1 solar radius (R☉) is equal to 695,700 kilometres (~432,287 miles).

The spectral classes for most supergiant stars are derived from the RSGs and Close Stars Catalog, a GitHub repository developed by SNEWS2.0. The catalog adopts a mean spectral type based on various spectral types given from numerous papers, providing a reliable estimation.

Table of the largest known stars (with reliable stellar radii approximations)
Designation Proper Name Radius (R☉) Mean Spectral Type Notes
WOH G64 1,540[1] M5[1] Possibly the largest known star. Located in the Large Magellanic Cloud (LMC), a satellite galaxy of the Milky Way.
VY CMa 1,420[2] M2.5[3] Possibly the largest known star in the Milky Way.
AH Sco 1,411 M5[3]
W26 1,221 M5[4][5][6] Mean spectral type of (<M6I)[4], (M5-6I)[5], and (M2-5I)[6].
alf Ori Betelgeuse 764 M1-M2[3]
alf Sco A Antares 680 M1.5[3]
  1. ^ a b Levesque, Emily M.; Massey, Philip; Plez, Bertrand; Olsen, Knut A. G. (2009-06-01). "The Physical Properties of the Red Supergiant WOH G64: The Largest Star Known?". The Astronomical Journal. 137: 4744–4752. doi:10.1088/0004-6256/137/6/4744. ISSN 0004-6256.
  2. ^ Wittkowski, M.; Hauschildt, P. H.; Arroyo-Torres, B.; Marcaide, J. M. (2012-04-01). "Fundamental properties and atmospheric structure of the red supergiant VY Canis Majoris based on VLTI/AMBER spectro-interferometry". Astronomy and Astrophysics. 540: L12. doi:10.1051/0004-6361/201219126. ISSN 0004-6361.
  3. ^ a b c d "candidate_list/RSG_and_close_stars_catalog_4_11_24.csv at main · SNEWS2/candidate_list". GitHub. Retrieved 2024-06-18.
  4. ^ a b Clark, J. S.; Negueruela, I.; Crowther, P. A.; Goodwin, S. P. (2005-05). "On the massive stellar population of the Super Star Cluster Westerlund 1". Astronomy & Astrophysics. 434 (3): 949–969. doi:10.1051/0004-6361:20042413. ISSN 0004-6361. {{cite journal}}: Check date values in: |date= (help)
  5. ^ a b Mengel, S.; Tacconi-Garman, L. E. (2009-12). "Westerlund 1: bound or unbound?". Astrophysics and Space Science. 324 (2–4): 321–325. doi:10.1007/s10509-009-0106-7. ISSN 0004-640X. {{cite journal}}: Check date values in: |date= (help)
  6. ^ a b Clark, J. S.; Ritchie, B. W.; Negueruela, I. (2020-03-01). "A VLT/FLAMES survey for massive binaries in Westerlund 1 - VII. Cluster census". Astronomy & Astrophysics. 635: A187. doi:10.1051/0004-6361/201935903. ISSN 0004-6361.
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