http://www.jpl.nasa.gov/news/news.php?release=2017-020&rn=news.xml&rst=6730
A new device on the W.M. Keck Observatory in Hawaii has delivered its first images, showing a ring of planet-forming dust around a star, and separately, a cool, star-like body, called a brown dwarf, lying near its companion star. The device, called a vortex coronagraph, was recently installed inside NIRC2 (Near Infrared Camera 2), the workhorse infrared imaging camera at Keck. It has the potential to image planetary systems and brown dwarfs closer to their host stars than any other instrument in the world.
"The vortex coronagraph allows us to peer into the regions around stars where giant planets like Jupiter and Saturn supposedly form," said Dmitri Mawet, research scientist at NASA's Jet Propulsion Laboratory and Caltech, both in Pasadena. "Before now, we were only able to image gas giants that are born much farther out. With the vortex, we will be able to see planets orbiting as close to their stars as Jupiter is to our sun, or about two to three times closer than what was possible before."
The new vortex results are presented in two papers, both published in the January 2017 issue of The Astronomical Journal.
(Score: 0) by Anonymous Coward on Thursday February 02 2017, @07:49AM
This thing looks like a cross between diffraction grating and a zone plate. It sure looks like the sort of thing that would need to be tuned to one particular color of light. If not, how so?
http://en.wikipedia.org/wiki/Vortex_coronagraph [wikipedia.org]
http://en.wikipedia.org/wiki/Diffraction_grating [wikipedia.org]
http://en.wikipedia.org/wiki/Zone_plate [wikipedia.org]