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Star’s baffling magnetic flips

tau boötis tau boo magnetic field exoplanets hot jupiters

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#1    Waspie_Dwarf

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Posted 04 July 2013 - 02:42 PM

Star Tau Boo’s baffling magnetic flips


Royal Astronomical Society said:

The first observations of the complete magnetic cycle of a star other than the Sun are proving a puzzle to astronomers. Tau Boötis, known as Tau Boo (τ Boo), is a yellowish star that is a little brighter than our Sun.  It is located 51 light years away in the constellation of Boötes.  It is host to a giant exoplanet about six times the mass of Jupiter, which orbits Tau Boo every 3.3 days.

In 2007, the magnetic field of Tau Boo was seen to flip: the first time this was observed to happen in a star other than the Sun. Since then the team has observed four reversals in polarity and is now able to confirm that the star has a rapid magnetic cycle of no more than two years – compared to 22 years for the Sun.   This cycle will subject the orbiting hot-Jupiter to very fast changes in its surrounding environment.  Dr Rim Fares will present findings at the National Astronomy Meeting in St Andrews on Thursday 4 July.

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#2    lightly

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Posted 04 July 2013 - 03:21 PM

Fascinating.   I'm glad they are baffled.. as that may lead to new discoveries.

Important:  The above may contain errors, inaccuracies, omissions, and other limitations.




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