IR image taken with the Keck 2 telescope on Mauna Kea. The star is seen here behind a partly transparent coronagraph mask to help bring out faint companions. Image Credit:  B. Bowler/IFA


Artist's view of the spinning magnetic field of the sun-like star tau Boo. (Credit: Karen Teramura, Institute for Astronomy, University of Hawaii)



Artist's view of the gaseous disk that may have once engulfed and maneuvered the quadruple stellar system into its unusually small orbit. (Credit: Karen Teramura, Institute for Astronomy, University of Hawaii)



Artist's view of the giant exoplanet orbiting Tau Bootis, through the star's magnetic arcs. (credit: David Aguilar, CfA)



Shane Erno's conception of the flare.

 Shane Erno's conception of the flare.

Lowell astronomer, collaborators point the way for exoplanet search (11/12/2012)

Though the search for planets around other stars, or exoplanets, is showing researchers that planets are abundant in our galaxy, it helps a great deal to have directions when searching for as-of-yet undiscovered exoplanets. Lowell astronomer Evgenya Shkolnik and her collaborators have written such  a set of directions, if you will. By looking for markers in spectroscopic data and measuring the motions of the stars, Shkolnik and her collaborators were able to carefully examine the ages of young, nearby stars. Since low-mass stars are small and dim, they are good candidates for directly imaging planets around them. And young stars make it even easier since the young planet is still hot and bright.

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The Spinning Magnet of a Sun-like Star                              (02/12/2008)

An international team of astronomers, which includes University of Hawaii's Evgenya Shkolnik, has just caught a star called tau Bootis flip its north and south magnetic poles. The Sun does this regularly every 11 years, but this is the first time it has been seen on another star. For the sun-like star, tau Bootis, the event likely happens more often than in our Sun, possibly due to its tightly orbiting giant planet speeding up the process.

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Four 's a Crowd: A Rare Quartet of Stars May Unlock Secrets of Stellar Evolution (01/10/2008)

Astronomers using telescopes on Mauna Kea have found an extremely rare quartet of stars that orbit each other within a region smaller than Jupiter's orbit round the Sun. The quartet appears as a speck of light even when viewed with the world's most powerful telescopes but its spectrum reveals not one, but four distinct stars arranged in two pairs. Astronomers are now struggling to work out whether they could have been born that way, or were forced together by a dense disk of gas in their youth.

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Star and Planet Tie the Knot (12/05/2006)

Artist's view of the giant exoplanet orbiting Tau Bootis, through the star's magnetic arcs. (credit: David Aguilar, CfA)

Astronomers using the Canada-France-Hawaii telescope on Mauna Kea have announced the discovery of magnetism in a star 50 light-years away. The magnetic field is 100 times weaker than that of a typical refrigerator magnet.

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Planet Creates a Stellar Storm:

First Evidence of an Extra-Solar Planet with a Magnetic Field


Canadian astronomers announced today the first evidence of a magnetic field on a planet outside of our solar system which is also the first observation of a planet heating its star. The report was presented this morning by Ph.D. candidate Evgenya Shkolnik, Dr. Gordon Walker, both of the University of British Columbia, Vancouver, BC and Dr. David Bohlender of the National Research Council of Canada / Herzberg Institute for Astrophysics, Victoria, BC at the meeting of the American Astronomical Society in Atlanta, Georgia. The result may offer clues about the structure and formation of the giant planet.