List of stars with resolved images

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

ListEdit

List of stars with resolved images
Star Image Diameter Distance
(ly)
Imager Notes
Angular (mas) Geometric (Sun = 1)
Sun   2 × 106 1 0.0000158 Various
Proxima Centauri 1.02 ± 0.08 0.141 ± 0.007 4.246 ± 0.006 Very Large Telescope 2nd closest star.
Rigil Kentaurus (Alpha Centauri A) 8.511 ± 0.020 1.224 ± 0.003 4.37 Very Large Telescope - VINCI/VLTI[2]
Toliman (Alpha Centauri B) 6.001 ± 0.034 0.863 ± 0.005
Altair   3.2 1.66 ± 0.01 (polar)
2.02 ± 0.01 (equator)
16.77 ± 0.08 CHARA array - MIRC[3]
Rasalhague (Alpha Ophiuchi A) 1.62 ± 0.03 2.39 ± 0.01 (polar)
2.87 ± 0.02 (equator)
48.6 ± 0.8 CHARA array - MIRC[4]
Alderamin (Alpha Cephei) 1.35 ± 0.02 (polar)
1.75 ± 0.03 (equatorial)
2.20 ± 0.04 (polar)
2.74 ± 0.04 (equator)
48.8 ± 0.36 CHARA array - MIRC[4]
Caph (Beta Cassiopeiae) 1.70 ± 0.04 3.1 ± 0.1 (polar)
3.8 ± 0.1 (equator)
54.7 ± 0.3 CHARA array - MIRC[5]
Regulus (Alpha Leonis A) 1.24 ± 0.02 3.2 ± 0.1 (polar)
4.2 ± 0.1 (equator)
79.3 ± 0.7 CHARA array - MIRC[5]
Algol Aa1 (Beta Persei Aa1)
(stationary object)
  0.88 ± 0.05 4.13 93 ± 2 CHARA array - MIRC[6]
Algol Aa2 (Beta Persei Aa2)
(orbiting object)
1.12 ± 0.07 3
Algol Ab (Beta Persei Ab) 0.56 ± 0.10 0.9 Observed radius of Algol Ab is an instrumental artifact,
caused by bandwidth smearing. Actual radius is 1.73 ± 0.33 R.
Zeta Andromedae Aa 2.502 ± 0.008 15.0 ± 0.8 (polar) 189 ± 3 CHARA array - MIRC[7][8] First direct imaging of starspots on a star outside the Solar System.
R Doradus   57 ± 5 370 ± 50 204 ± 9 New Technology Telescope[9] 2nd largest known star by apparent diameter in Earth's sky,
after the Sun.
Mira (Omicron Ceti)   50 up to 700 420 Hubble - FOC[10]
T Leporis   5.8
15 for molecular layer
100 500 Very Large Telescope - VLTI[11]/AMBER[12]
Pi1 Gruis   18.37[citation needed] 694 530 Very Large Telescope - PIONIER[13] First directly observed granulation patterns on a star's surface
outside the Solar System.
Antares   41.3 ± 0.1 700 620 Very Large Telescope - VLTI/AMBER[14]
Betelgeuse   50 630 643 ± 146
Sheliak A (Beta Lyrae A) 0.46 6 960 ± 50 CHARA array - MIRC[18]
Theta1 Orionis C   0.2 10.6 ± 1.5 1400 Very Large Telescope - AMBER[19],
GRAVITY[20]
Almaaz A (Epsilon Aurigae A) 2.27 3.7 ± 0.7 ca. 2000 CHARA array - MIRC[21]
Almaaz B (Epsilon Aurigae B) 5.9 ± 0.1

See alsoEdit

ReferencesEdit

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  2. ^ P. Kervella, F. Thevenin, D. Segransan, G. Berthomieu, B. Lopez, P. Morel, J. Provost, The diameters of Alpha Centauri A and B - A comparison of the asteroseismic and VINCI/VLTI views, Astronomy and Astrophysics 404 3 (2003) 1087–1097.
  3. ^ 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.
  4. ^ a b M. Zhao; et al. (2009). "Imaging And Modeling Rapidly Rotating Stars: Alpha Cephei And Alpha Ophiuchi". The Astrophysical Journal. 701 (1): 209–224. arXiv:0906.2241. Bibcode:2009ApJ...701..209Z. doi:10.1088/0004-637X/701/1/209.
  5. ^ a b X. Che; et al. (2011). "Colder And Hotter: Interferometric Imaging Of Beta Cassiopeiae And ?lpha Leonis". The Astrophysical Journal. 732 (2): 68. arXiv:1105.0740. Bibcode:2011ApJ...732...68C. doi:10.1088/0004-637X/732/2/68.
  6. ^ Baron, F.; Monnier, J.; Pedretti, E.; Zhao, M.; Schaefer, G.; Parks, R.; Che, X.; Thureau, N.; ten Brummelaar, T. A.; McAlister, H. A.; Ridgway, S. T.; Farrington, C.; Sturmann, J.; Sturmann, L.; Turner, N. (2012). "Imaging the Algol Triple System in the H Band with the CHARA Interferometer". The Astrophysical Journal. 752 (1): 20. arXiv:1205.0754. Bibcode:2012ApJ...752...20B. doi:10.1088/0004-637X/752/1/20.
  7. ^ Kővári, Zs.; Bartus, J.; Strassmeier, K. G.; Oláh, K.; Weber, M.; Rice, J. B.; Washuettl, A. (2007). "Doppler imaging of stellar surface structure. XXIII. The ellipsoidal K giant binary ζ Andromedae". Astronomy and Astrophysics. 463 (3): 1071. arXiv:1301.0445. Bibcode:2007A&A...463.1071K. doi:10.1051/0004-6361:20065982.
  8. ^ Roettenbacher, R.M.; Monnier, J.D.; Korhonen, H.; Aarnio, A.N.; Baron, F.; Che, X.; Harmon, R.O.; Kővári, Zs.; Kraus, S.; Schaefer, G.H.; Torres, G.; Zhao, M.; Ten Brummelaar, T.A.; Sturmann, J.; Sturmann, L. (2016). "No Sun-like dynamo on the active star ζ Andromedae from starspot asymmetry". Nature. 533 (7602): 217–220. arXiv:1709.10107. Bibcode:2016Natur.533..217R. doi:10.1038/nature17444. PMID 27144357.
  9. ^ "The Biggest Star in the Sky". ESO. March 11, 1997. Retrieved 2010-06-26.
  10. ^ "Hubble Separates Stars in the Mira Binary System". HubbleSite. 6 August 1997. Retrieved 26 June 2017.
  11. ^ "Hundred metre virtual telescope captures unique detailed colour image". European Southern Observatory. 18 February 2009. Retrieved 26 June 2017.
  12. ^ J.-B. Le Bouquin, S. Lacour, S. Renard, E. Thiébaut, A. Merand, T. Verhoelst, Pre-maximum spectro-imaging of the Mira star T Leporis with AMBER/VLTI, Astronomy and Astrophysics Volume 496, Number 1, March II 2009, L1-L4.
  13. ^ "Giant Bubbles on Red Giant Star's Surface". www.eso.org. Retrieved 22 December 2017.
  14. ^ "Astronomers Capture Best-Ever Image of Alien Star". Scientific American. 24 August 2017. Retrieved 27 August 2017.
  15. ^ "Betelgeuse captured by ALMA". European Southern Observatory. 26 June 2017. Retrieved 26 June 2017.
  16. ^ "Sharpest views of Betelgeuse reveal how supergiant stars lose mass". European Southern Observatory. 29 July 2009. Retrieved 26 June 2017.
  17. ^ "The Flames of Betelgeuse". European Southern Observatory. 23 June 2011. Retrieved 26 June 2017.
  18. ^ M. Zhao; et al. (2008). "First Resolved Images Of The Eclipsing And Interacting Binary Beta Lyrae". The Astrophysical Journal. 684 (2): L95–L98. arXiv:0808.0932. Bibcode:2008ApJ...684L..95Z. doi:10.1086/592146.
  19. ^ "The orbit of Theta1 Orionis C". European Southern Observatory. 18 February 2009. Retrieved 26 June 2017.
  20. ^ "GRAVITY discovers new double star in Orion Trapezium cluster". European Southern Observatory. 13 January 2016. Retrieved 26 June 2017.
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