List of stars with resolved images

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The following is a list of stars whose images have been resolved beyond a point source. Aside from the Sun, stars are tremendously small in apparent size, requiring the use of special high-resolution equipment to image. For example, the first star, other than the Sun, to be directly imaged was Betelgeuse. It has an angular diameter of only 50 milliarcseconds (mas).[1]

List[edit]

An incomplete list is as follows:

Star Angular diameter Radius
(RSun)
Distance Imager
The Sun 30 arcminutes 1 1 au Resolvable with the naked eye.
Also, see solar telescope
Altair 3.2 mas 1.7 16.77 ± 0.08 ly MIRC instrument on the CHARA Array[2]
Betelgeuse 50 mas 630 643 ± 146 ly Aperture Masking Interferometry, Hubble[1]
R Doradus 57 ± 5 mas 370 ± 50 204 ± 9 ly New Technology Telescope[3]
Mira (Omicron Ceti) 50 up to 700 420 ly Hubble[4]
Epsilon Aurigae 2.27 mas (A component) 3.7 ± 0.7 (A component)
5.9 ± 0.1 (B component)
ca. 2000 ly MIRC instrument on the CHARA Array[5]
Beta Cassiopeiae 1.70 ± 0.04 mas 3.8 ± 0.1 54.7 ± 0.3 MIRC instrument on the CHARA Array[6]
Regulus (Alpha Leonis A) 1.24 ± 0.02 mas 4.2 ± 0.1 (equator) 79.3 ± 0.7 MIRC instrument on the CHARA Array[6]

See also[edit]

References[edit]

  1. ^ a b H.Uitenbroek et al.; Dupree, A. K.; Gilliland, R. L. (1998). "Spatially Resolved Hubble Space Telescope Spectra of the Chromosphere of alpha Orionis". Astronomical Journal 116 (5): 2501. Bibcode:1998AJ....116.2501U. doi:10.1086/300596. 
  2. ^ J.D. Monnier et al. (2007). "Imaging the Surface of Altair". Science 317 (5836): 342–5. arXiv:0706.0867. Bibcode:2007Sci...317..342M. doi:10.1126/science.1143205. PMID 17540860. 
  3. ^ "The Biggest Star in the Sky". ESO. March 11, 1997. Retrieved 2010-06-26. 
  4. ^ "Resolving Mira". NASA. October 11, 1998. Retrieved 2012-10-24. 
  5. ^ B. Kloppenborg et al. (2010). "Infrared images of the transiting disk in the Epsilon Aurigae system". Nature 464 (7290): 370–2. arXiv:1004.2464. Bibcode:2010Natur.464..870K. doi:10.1038/nature08968. 
  6. ^ a b X. Che et al. (2011). "Colder And Hotter: Interferometric Imaging Of Beta Cassiopeiae And Αlpha Leonis". The Astrophysical Journal 732: 68. arXiv:1105.0740. Bibcode:2011ApJ...732...68C. doi:10.1088/0004-637X/732/2/68.