IRAS 08544−4431
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Double star IRAS 08544−4431 |
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| Interferometric false color recording with the VLTI in the infrared range: the blue channel shows the wavelength 2 µm, red 10 µm; the image has an extension of 60 AU . The position of the central star is indicated by a cross. | |||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| AladinLite | |||||||||||
| Constellation | Sails of the ship | ||||||||||
| Right ascension | 08 h 56 m 14.2 s | ||||||||||
| declination | -44 ° 43 ′ 11 ″ | ||||||||||
| Apparent brightness | 9.2 mag; RV Tauri variable with an amplitude of 0.18 mag |
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| Astrometry | |||||||||||
| distance | 2600 ly (800 pc ) |
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| orbit | |||||||||||
| period | 499 ± 3 d | ||||||||||
| eccentricity | 0.14 ± 0.02 | ||||||||||
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| Names | A; B. | ||||||||||
| Other names and catalog entries |
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IRAS 08544-4431 ( V390 Velorum ) is a variable star in the constellation Vela at the southern sky , which is about 800 parsecs (2,600 light years) from the sun away. It is a double star system with a Post-AGB star .
properties
The main star of IRAS 08544−4431 is currently evolving from the red giant to the white dwarf , a transition in which a large amount of gas and dust is repelled, later forming a planetary nebula . Interferometric observations revealed that the star is surrounded by a circumstellar disk that extends from 9 to several hundred AU and also includes the companion.
Web links
- ESO : VLTI discovers a disk around an aging star that resembles a disk around a young star (+ photos, map & animation) March 9, 2016
- astronews.com: The dust disk around an aging star March 9, 2016