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public:news:2013-10-17_2 [2013/10/17 15:52]
mjanson
public:news:2013-10-17_2 [2013/10/17 15:52]
mjanson
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 Consequently,​ Dr. Janson has led a follow-up study of GJ 504 b in order to try to determine the composition of its atmosphere. This has now resulted in a clear detection of methane. Like most molecules, methane interacts strongly with light only at some specific wavelengths. As a result, a planet with methane in its atmosphere will become much darker at those particular wavelengths,​ and can even become completely invisible, if there is a sufficiently large abundance of methane. This is precisely what is observed for GJ 504 b. An image taken in a filter that only lets through light outside of the methane bands shows the planet clearly, but in a simultaneous image with a filter that only lets through light inside of those bands, the planet disappears altogether. Consequently,​ Dr. Janson has led a follow-up study of GJ 504 b in order to try to determine the composition of its atmosphere. This has now resulted in a clear detection of methane. Like most molecules, methane interacts strongly with light only at some specific wavelengths. As a result, a planet with methane in its atmosphere will become much darker at those particular wavelengths,​ and can even become completely invisible, if there is a sufficiently large abundance of methane. This is precisely what is observed for GJ 504 b. An image taken in a filter that only lets through light outside of the methane bands shows the planet clearly, but in a simultaneous image with a filter that only lets through light inside of those bands, the planet disappears altogether.
  
-The discovery of methane in the atmosphere of GJ 504 was made as part of the SEEDS project, which is an international collaboration using the HiCIAO camera at the Subaru telescope, which is run by the National Astronomical Observatory of Japan. The publication describing the results has been accepted for publication in the Astrophysical Journal Letters.+The discovery of methane in the atmosphere of GJ 504 was made as part of the SEEDS project, which is an international collaboration using the HiCIAO camera at the Subaru telescope, which is run by the National Astronomical Observatory of Japan. The publication describing the results has been accepted for publication in the Astrophysical Journal Letters.
  
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public/news/2013-10-17_2.txt · Last modified: 2013/10/17 15:54 by mjanson

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