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New Infrared Instrument Searches for Habitable Planets
by Staff Writers
Tokyo, Japan (SPX) Jul 03, 2018

Test observation of a red dwarf. Comparing the star's spectrum (broken line) to the laser frequency comb (dots) allows researchers to calculate the motion of the star.

A new instrument to search for potentially habitable/inhabited planets has started operation at the Subaru Telescope. This instrument, IRD (InfraRed Doppler), will look for habitable planets around red dwarf stars. Astronomers are hoping that investigating these small but numerous stars will uncover a plethora of new planets.

Red dwarfs are smaller than the Sun and emit most of their energy as infrared (IR) rather than visible light. But because they are smaller, it is easier to find planets around them. Also, in the neighborhood around the Sun there are many late-M-type stars (a type of red dwarf) ripe for investigation. The sheer number of candidates raises the odds of finding potentially habitable or otherwise interesting planets.

But red dwarfs are enough different from the Sun that a new instrument was needed before they could be surveyed for planets. Researchers at NINS Astrobiology Center, National Astronomical Observatory of Japan, University of Tokyo, Tokyo University of Agriculture and Technology, and Tokyo Institute of Technology created IRD to observe the IR light which is emitted strongly by red dwarf stars.

Combined with the large light gathering power of the Subaru Telescope to capture the faint light from red dwarfs, IRD will allow astronomers to survey hundreds of stars looking for planets.

New technology, known as a laser frequency comb, provides a standard ruler for measuring the line-of-sight movement of a star to within a few meters per second. Watching this motion for effects caused by planets around the star reveals not only the presence of a planet, but also its characteristics, like its mass and distance from the star. By comparing this information to models, researchers can choose the most interesting planets for detailed follow up observations.

IRD had successful test observations earlier this year and will be available to the world-wide astronomical community starting from August 2018.


Related Links
National Astronomical Observatory Of Japan
Lands Beyond Beyond - extra solar planets - news and science
Life Beyond Earth


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EXO WORLDS
Astronomers Discover New Way for Giant Planets to Evolve
Preston UK (SPX) Jul 02, 2018
New research into the early stages of planet formation, published in the Monthly Notices of the Royal Astronomical Society, suggests that there may be more giant planets - most at least 10 times as big as Jupiter - orbiting at large distances from their host star than we previously thought. Using supercomputers, researchers at the University of Central Lancashire (UCLan) and Nagoya University in Japan have analysed how young planets interact with their host protoplanetary disc - the rotating disc ... read more

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