Johannes Buchner
@JohannesBuchner
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I build software telescopes to look closer at how black holes become supermassive. Professional X-ray astronomer.
Joined December 2012
Relating cosmic time and redshift with some context hints. Made this plot during my PhD years.
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Congratulations @boorm. a paper worth reading!
It was close, but we have the newest "Astro Plot of the Week" - congratulations!. And keep them coming - astro plots are the spookiest!
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Here we are trying with telescopes to look at distant space, and they just let space come to them.
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They see two families of particles with different velocities, which can be mapped back to two different origins. One family are cosmic rays from supernova explosions. The second family is the first, but with subsequent interactions with the interstellar medium. (2/3)
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TIL On the international space station elementary particles zooming through space are caught and recorded. And not just protons or electrons, all the way to thousands of iron nuclei. (1/3)
phys.org
Charged cosmic rays, high-energy clusters of particles moving through space, were first described in 1912 by physicist Victor Hess. Since their discovery, they have been the topic of numerous...
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My first 1h telecon while crossing three countries (Italy-Austria-Germany). Wifi worked fine! @unsereOEBB #returntrip #conference #teavel #ricap24.
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TIL the sun reprocesses cosmic rays into gamma rays which are picked up by water tanks in Mexico equipped with detectors. They found that the sun's region changes size over the years. Wild. @HAWC_Obs
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@eROSITA_SRG @thejunaverse @BlackHoleMapper @MilkyWayMapper Rashid Sunyaev retells the making of @eROSITA_SRG and SRG #erosita2024
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@eROSITA_SRG @thejunaverse @BlackHoleMapper @MilkyWayMapper Franz Bauer reviews the last 60 years of AGN X-ray surveys and questions still searching for answers #erosita2024
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@eROSITA_SRG @thejunaverse highlights the 1000-people-strong eROSITA-SDSS collaboration enriching both @BlackHoleMapper @MilkyWayMapper
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@eROSITA_SRG TIL the sun flew into a remnant of a supernova that exploded a few millions years ago. This creates a hot bubble environment we see all around us (talk by Michael Yeung).
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Paul Nandra gives a welcome to the @eROSITA_SRG Universe, next to a freshly printed all-sky globe by Peter Friedrich.
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From the great @Sotiria_F and referees, I learned a lot in the process myself, including the many reviews we point to. We hope it is useful for computer science /astro students and their supervisors! Please share the public access link :).
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Today we published the guide "How to set up your first #MachineLearning project in #Astronomy" in Nature Reviews Physics, containing some common sense tips for leading projects to completion. any advice we forgot?
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From the great @Sotiria_F and referees, I learned a lot in the process myself, including the many.reviews we point to. We hope it is useful for computer science / astro.students and their supervisors. Please share the public access link!.
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