Spectrum of planet around HR 8799 (annotated)

By studying a triple planetary system that resembles a scaled-up version of our own Sun’s family of planets, astronomers have been able to obtain the first direct spectrum of a planet around a star, thus bringing new insights into its formation and composition.The spectrum is that of a giant exoplanet, orbiting around the bright and very young star HR 8799, about 130 light-years away. This spectrum of the star and the planet was obtained with the NACO adaptive optics instrument on ESO’s Very Large Telescope. As the host star is several thousand times brighter than the planet, this is a remarkable achievement, at the border of what is technically possible. According to the scientists it is like trying to see what a candle is made of, by observing it from a distance of two kilometres when it’s next to a blindingly bright 300 Watt lamp. Despite the power of the VLT’s extraordinary adaptive optics system, the spectrum of the planet appears very faint, but still contains enough information for the astronomers to characterise the object. In the spectrum several artefacts from the instrument are seen, such as internal reflections, or “ghosts”, and diffraction rings.

Källa:

ESO/M. Janson

Om bilden

ID:eso1002c
Typ:Simulering
Publiceringsdatum:13 januari 2010 12:00
Relaterade pressmeddelanden:eso1002
Storlek:1980 x 984 px

Om objektet

Namn:HR 8799, Spectrum
Typ:Milky Way : Star : Evolutionary Stage : Young Stellar Object
Avstånd:130 ljusår
Kategori:Stars

Bildformat

Stor jpeg
233,7 kB
Skärmstor jpeg
75,4 kB

Skrivbordsunderlägg

1024x768
114,0 kB
1280x1024
157,8 kB
1600x1200
214,5 kB
1920x1200
257,8 kB
2048x1536
315,1 kB

 

Se även