List of stars with resolved images
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
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 | 1.66 ± 0.01 (polar) 2.02 ± 0.01 (equator) |
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 mas | 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 | 3.1 ± 0.1 (polar) 3.8 ± 0.1 (equator) |
54.7 ± 0.3 ly | MIRC instrument on the CHARA Array[6] |
| Regulus (Alpha Leonis A) | 1.24 ± 0.02 mas | 3.2 ± 0.1 (polar) 4.2 ± 0.1 (equator) |
79.3 ± 0.7 ly | MIRC instrument on the CHARA Array[6] |
| Algol (Beta Persei ABC) | 0.88 ± 0.05 mas (A component) 1.12 ± 0.07 mas (B component) 0.56 ± 0.10 mas (C component) |
4.13 (A component) 3 (B component) 0.9 (C component) |
93 ± 2 ly | MIRC instrument on the CHARA Array[7] |
| Alderamin (Alpha Cephei) | 1.35 ± 0.02 mas (polar) 1.75 ± 0.03 mas (equatorial) |
2.20 ± 0.04 (polar) 2.74 ± 0.04 (equator) |
48.8 ± 0.36 ly | MIRC instrument on the CHARA Array[8] |
| Rasalhague (Alpha Ophiuchi A) | 2.39 ± 0.01 (polar) 2.87 ± 0.02 (equator) |
48.6 ± 0.8 ly | MIRC instrument on the CHARA Array[8] | |
| Beta Lyrae | 0.46 mas (A component) | 6 (A component) | 960 ± 50 ly | MIRC instrument on the CHARA Array[9] |
- This list is incomplete; you can help by expanding it.
See also
- Doppler imaging which produces maps of the surfaces of stars
- Zeeman–Doppler imaging which maps the magnetic fields of stars
References
- 1 2 H.Uitenbroek; 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.
- ↑ 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.
- ↑ "The Biggest Star in the Sky". ESO. March 11, 1997. Retrieved 2010-06-26.
- ↑ "Resolving Mira". NASA. October 11, 1998. Retrieved 2012-10-24.
- ↑ 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.
- 1 2 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.
- ↑ 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. Retrieved 18 February 2015.
- 1 2 M. Zhao; et al. (2009). "Imaging And Modeling Rapidly Rotating Stars: Alpha Cephei And Alpha Ophiuchi". The Astrophysical Journal 701: 209. doi:10.1088/0004-637X/701/1/209.
- ↑ M. Zhao; et al. (2008). "First Resolved Images Of The Eclipsing And Interacting Binary Beta Lyrae". The Astrophysical Journal 684: L95. doi:10.1086/592146.
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