mei 022012
 

 

A research team of Japanese astronomers led by Dr. Hideaki Fujiwara (Subaru Telescope) has discovered a main-sequence star that is surrounded by a rare disk of quartz dust.

 Illustration of the HD 15407A System Based on Observations from AKARI and Spitzer.  The dusty quartz disk exists around the star.

Collisions of planetesimals, building blocks for planets, may have produced the dusty quartz ring during planet formation around the star.

Based on observations with the AKARI and Spitzer infrared space telescopes, this recently discovered, intriguing feature of a stellar system named  HD 15407A, may open new doors for research on the mineralogical nature of extrasolar planetary systems.

Source: National Astronomical Observatory of Japan (NAOJ)

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