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The Hobby-Eberly Telescope Dark Energy Experiment is a blind spectroscopy survey whose goal is to map out the large-scale structure of distant galaxies, in order to trace the evolution of Dark Energy. But since it is a blind survey, it records a spectrum for everything it looks at: stars, nebulae, supernovae, quasars, and everything else falling into its field of view.
The Hobby-Eberly Telescope Dark Energy Experiment is a blind spectroscopy survey whose goal is to map out the large-scale structure of distant galaxies, in order to trace the evolution of Dark Energy. But since it is a blind survey, it records a spectrum for everything it looks at: stars, nebulae, supernovae, quasars, and everything else falling into its field of view.
Click here for more information from the HETDEX public web page.
An example of the data products produced by HETDEX appears below.
M101-HETDEX-540p.mp4HETDEX is a true a multi-purpose survey. For instance, here is a mosaic of VIRUS data cubes of the nearby galaxy M101, which is located in the HETDEX survey area. The animation shows how the brightness of the galaxy depends on wavelength. Even though M101 is relatively face-on, you can see its rotation, and how the emission-line excitation changes over the face of the galaxy.
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