File:Algol AB movie imaged with the CHARA interferometer.gif
Algol_AB_movie_imaged_with_the_CHARA_interferometer.gif (340 × 340 pixel, dimensione del file: 405 KB, tipo MIME: image/gif, ciclico, 55 frame, 3,0 s)
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[modifica]DescrizioneAlgol AB movie imaged with the CHARA interferometer.gif |
English: Algol (β Persei) is a triple-star system (Algol A, B, and C) in the constellation Perseus, in which the large and bright primary Algol A is regularly eclipsed by the dimmer Algol B every 2.87 days. The eclipsing binary pair is separated by only 0.062 astronomical units (AU) from each other, so close in fact that Algol A is slowly consuming the less massive Algol B by continually stripping off Algol B's outer layers. This animation was assembled from 55 images of the CHARA interferometer in the near-infrared H-band, sorted according to orbital phase. Because some phases are poorly covered, B jumps at some points along its path. The images vary in quality, but the best have a resolution of 0.5 milliarcseconds, or approximately 200 times better than the Hubble Space Telescope. (A milliarcsecond is about the size of a quarter atop the Eiffel Tower as seen from New York City.) Tidal distortions of Algol B giving it an elongated appearance are readily apparent. Tidal distortions also result in "gravity darkening" effects, whereby in a significant number of images of Algol B, the edge or "limb" of the image is actually brighter than the center. (Baron et al., 2012) |
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Fonte | http://www.oculum.de/newsletter/astro/100/60/2/2-02_algol_movie.gif, http://www.oculum.de/newsletter/astro/100/60/2/162.fa1cn.asp | ||
Autore | Dr Fabien Baron, Dept. of Astronomy, University of Michigan, Ann Arbor, MI 48109-1090 | ||
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This file was selected as the media of the day for 12 March 2014. It was captioned as follows:
English: Algol (β Persei) is a triple-star system (Algol A, B, and C) in the constellation Perseus, in which the large and bright primary Algol A is regularly eclipsed by the dimmer Algol B every 2.87 days. The eclipsing binary pair is separated by only 0.062 astronomical units (AU) from each other, so close in fact that Algol A is slowly consuming the less massive Algol B by continually stripping off Algol B's outer layers. This animation was assembled from 55 images of the CHARA interferometer in the near-infrared H-band, sorted according to orbital phase.
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English: Algol (β Persei) is a triple-star system (Algol A, B, and C) in the constellation Perseus, in which the large and bright primary Algol A is regularly eclipsed by the dimmer Algol B every 2.87 days. The eclipsing binary pair is separated by only 0.062 astronomical units (AU) from each other, so close in fact that Algol A is slowly consuming the less massive Algol B by continually stripping off Algol B's outer layers. This animation was assembled from 55 images of the CHARA interferometer in the near-infrared H-band, sorted according to orbital phase. 中文(简体):大陵五是英仙座的一个三星系统
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Data/Ora | Miniatura | Dimensioni | Utente | Commento | |
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attuale | 08:45, 4 ott 2012 | 340 × 340 (405 KB) | Stigmatella aurantiaca (discussione | contributi) | Decreased file size | |
08:24, 4 ott 2012 | 340 × 340 (2,37 MB) | Stigmatella aurantiaca (discussione | contributi) | {{Information |Description ={{en|1=Algol B orbits Algol A. This animation was assembled from 55 images of the CHARA interferometer in the near-infrared H-band, sorted according to orbital phase. Because some phases are poorly covered, B jumps at som... |
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