DLR: eROSITA – The Hunt for Dark Energy Begins

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DLR: eROSITA – The Hunt for Dark Energy Begins

Post by bystander » Tue Jun 18, 2019 3:46 pm

eROSITA – The Hunt for Dark Energy Begins
German Aerospace Center (DLR) | 2019 Jun 18

The eROSITA X-ray Telescope - On the Hunt for Dark Energy
Credit: DLR - German Aerospace Center

On 21 June 2019 the Spektrum-Röntgen-Gamma (Spektr-RG / SRG) spacecraft will be launched from the Kazakh steppe, marking the start of an exciting journey. SRG will be carrying the German ‘extended ROentgen Survey with an Imaging Telescope Array’ (eROSITA) X-ray telescope and its Russian ART-XC partner instrument. A Proton rocket will carry the spacecraft from the Baikonur Cosmodrome towards its destination – the second Lagrange point of the Sun-Earth system, L2, which is 1.5 million kilometres from Earth. In orbit around this equilibrium point, eROSITA will embark upon the largest ever survey of the hot Universe. The space telescope will use its seven X-ray detectors to observe the entire sky and search for and map hot sources such as galaxy clusters, active black holes, supernova remnants, X-ray binaries and neutron stars. “eROSITA’s X-ray ‘eyes’ are the best that have ever been launched as part of a space telescope. Their unique combination of light-collecting area, field-of-view and resolution makes them approximately 20 times more sensitive than the ROSAT telescope that flew to space in the 1990s. ROSAT also incorporated advanced technology that was ‘made in Germany’. With its enhanced capabilities, eROSITA will help researchers gain a better understanding of the structure and development of the Universe, and also contribute towards investigations into the mystery of Dark Energy,” says Walther Pelzer, Executive Board Member for the Space Administration at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR), which supported the development of eROSITA at the Max Planck Institute for Extraterrestrial Physics (MPE). ...

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MPE: eROSITA Launch Heralds New Era for X-ray Astronomy

Post by bystander » Mon Jul 15, 2019 7:06 pm

eROSITA Launch Heralds New Era for X-ray Astronomy
Max Planck Institute for Extraterrestrial Physics (MPE) | 2019 Jul 13

MPE telescope will revolutionize our view of the evolving hot Universe

Click to play embedded YouTube video.
At 14:31 on 13 July 2019, the Spektrum-Roentgen-Gamma (SRG) space mission successfully lifted off from the Baikonur cosmodrome. On-board is the eROSITA X-ray telescope, which was developed and built by a consortium of German institutes supported by DLR and led by the Max Planck Institute for Extraterrestrial Physics (MPE). Now on its way to an L2 orbit, 1.5 million kilometres from Earth, eROSITA will perform a deep survey of the entire X-ray sky over the next four years, providing the first ever deep imaging survey of the sky at soft and hard X-rays. ...

eROSITA is part of the Russian-German Spektrum-Roentgen-Gamma (SRG) space mission, which also includes the Russian ART-XC telescope. The eROSITA X-ray telescope was developed and built under the leadership of Predehl at the Max Planck Institute for Extraterrestrial Physics (MPE), together with several University partners. It will perform a deep survey of the entire X-ray sky. In the soft X-ray band (0.5-2 keV), this will be more than 20 times more sensitive than the prior ROSAT all sky survey, also led by MPE, while in the hard X-ray band (2-10 keV) it will provide the first ever true imaging survey of the sky at those energies. Over a period of four years eROSITA is expected to find 100,000 X-ray emitting galaxy clusters, several million active black holes in the centres of galaxies, and many rare objects such as isolated neutron stars. In its first year, eROSITA will discover more new X-ray sources than have been seen in the entire 50-plus year history of X-ray astronomy.

“The main scientific goal of eROSITA is to reveal the large scale structure of the Universe and how that structure grows over cosmic time. This might help reveal the properties of the mysterious ‘dark energy’ pulling the Universe apart,” explains Andrea Merloni, the eROSITA Project Scientist. “The clusters of galaxies that mark out that structure are filled with gas at temperatures of a million degrees or more. To see that directly, you have to use an X-ray telescope. With eROSITA covering the whole sky, we can see enough of them to reconstruct their growth history extremely accurately. That in turn tells us something about the amount, and perhaps the nature, of dark energy and dark matter.” ...
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
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