LS IV −14 ° 116
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Star LS IV −14 ° 116 |
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| AladinLite | |||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Aquarius | ||||
| Right ascension | 20 h 57 m 38.87 s | ||||
| declination | -14 ° 25 ′ 44 ″ | ||||
| Apparent brightness | (13.02) mag | ||||
| Typing | |||||
| B − V color index | (-0.29) | ||||
| U − B color index | (-1.10) | ||||
| Spectral class | sdB0.5VIIHe18 | ||||
| Astrometry | |||||
| parallax | (2,379 ± 0.082) mas | ||||
| distance | (1,370) ly (420) pc |
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| Proper movement | |||||
| Rec. Share: | (7.49) mas / a | ||||
| Dec. portion: | (-127.992) mas / a | ||||
| Physical Properties | |||||
| Effective temperature | (34000 ± 500) K. | ||||
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Other names and catalog entries |
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LS IV −14 ° 116 (also shortened LS IV −14 116 , or V366 Aquarii ) is a star on the border of the constellations Capricorn and Aquarius . It belongs to the class of the helium-rich B-sub- dwarfs (type: V361 Hya) and is about 2000 light-years away from earth , according to Gaia DR2 1370 light-years.
Researchers led by Simon Jeffrey from the Armagh Observatory in Northern Ireland assume that zirconium has formed a sparkling layer of cloud around LS IV −14 ° 116. Researchers used a spectrograph to analyze the chemical composition of the stellar atmosphere. The analysis showed that the old star has around ten thousand times as much zirconium as our sun . Such a high zirconium content has never been measured in any star. The metals strontium , germanium and yttrium are also a thousand times more common there. Presumably, however, these metals are only present in such abundance in the outer layers of the star. The cloud layer contains around four billion tons of zirconium. The zirconium clouds should give the star an iridescent appearance. However, this cannot be observed directly; the old star is over 1000 light years too far away for that.
Web links
- A sparkling zirconium star . Armagh Observatory (English)
- arxiv : 1010.5146 (English)
- Distant Star Enveloped By Ingredients for Fake Diamonds . space.com (English)
- VSX entry
Individual evidence
- ↑ a b c d e f g h Simbad
- ↑ a b c d e f A sparkling zirconium star . ( Memento of the original from December 12, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Armagh Observatory
