Kappa Cassiopeiae
| Stern κ Cassiopeiae | |||||
|---|---|---|---|---|---|
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| κ Cassiopeiae und seine Bugstoßwelle, Infrarotaufnahme des Spitzer-Weltraumteleskops in Falschfarben | |||||
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| AladinLite | |||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||
| Sternbild | Kassiopeia | ||||
| Rektaszension | 00h 32m 59,3s | ||||
| Deklination | +62° 56′ 7″ | ||||
| Helligkeiten | |||||
| Spektrum und Indices | |||||
| Astrometrie | |||||
| Physikalische Eigenschaften | |||||
| Andere Bezeichnungen und Katalogeinträge | |||||
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κ Cassiopeiae (kappa Cassiopeiae, kurz κ Cas) ist ein Stern im Sternbild Kassiopeia. Er bewegt sich relativ zum Interstellaren Medium mit sehr hoher Geschwindigkeit (Schnellläufer), wodurch vier Lichtjahre vor dem Stern eine Bugstoßwelle entsteht.[1]
Einzelnachweise
- ↑ The Shocking Behavior of a Speedy Star. 14. Februar 2020, abgerufen am 6. September 2021 (englisch).
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Kappa Cassiopeiae.jpg
Kappa Cassiopeiae, or HD 2905 to astronomers, is a runaway star—a massive, hot supergiant gone rogue. What really makes the star stand out in this image is the surrounding, streaky red glow of material in its path. Such structures are called bow shocks, and they can often be seen in front of the fastest, most massive stars in the galaxy.
Kappa Cassiopeiae, or HD 2905 to astronomers, is a runaway star—a massive, hot supergiant gone rogue. What really makes the star stand out in this image is the surrounding, streaky red glow of material in its path. Such structures are called bow shocks, and they can often be seen in front of the fastest, most massive stars in the galaxy.
Bow shocks form where the magnetic fields and wind of particles flowing off a star collide with the diffuse, and usually invisible, gas and dust that fill the space between stars. How these shocks light up tells astronomers about the conditions around the star and in space. Slow-moving stars like our sun have bow shocks that are nearly invisible at all wavelengths of light, but fast stars like Kappa Cassiopeiae create shocks that can be seen by Spitzer’s infrared detectors.
Incredibly, this shock is created about 4 light-years ahead of Kappa Cassiopeiae, showing what a sizable impact this star has on its surroundings.
Cassiopeia IAU.svg
Autor/Urheber: IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg), Lizenz: CC BY 3.0
IAU Cassiopeia chart.
Autor/Urheber: IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg), Lizenz: CC BY 3.0
IAU Cassiopeia chart.