ZAH@uniheidelberg

@zah_unihd
19 Followers
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11 Posts
Zentrum für Astronomie der Universität Heidelberg (ZAH) - Center for Astronomy of Heidelberg University (ZAH) @uniheidelberg #zah_hd
ZAH Homepagehttps://zah.uni-heidelberg.de/welcome

„First Light“ für neues astronomisches Instrument in Chile – Spektrograph und Software aus Heidelberg: Multi-Objekt-Teleskop 4MOST hat den Betrieb aufgenommen https://www.uni-heidelberg.de/de/newsroom/first-light-fuer-neues-astronomisches-instrument-in-chile
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“First Light” for New Astronomical Instrument in Chile – Spectrograph and software from Heidelberg: Multi-Object Telescope 4MOST has started operations https://www.uni-heidelberg.de/en/newsroom/first-light-for-new-astronomical-instrument-in-chile

#universität #heidelberg #uniheidelberg #astronomie #teleskop #spektrograph #4most #ESO #firstlight

CARMENES-Daten: Erdähnliche Planeten finden sich besonders häufig um massearme Sterne – Untersuchungen zu 15 M-Sternen liefern neue Erkenntnisse zum Vorkommen von Exoplaneten
https://www.uni-heidelberg.de/de/newsroom/carmenes-daten-erdaehnliche-planeten-finden-sich-besonders-haeufig-um-massearme-sterne
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CARMENES Data: Earth-like Planets Especially Common Around Low-mass Stars – Studies of 15 M-stars offer new insights into the presence of exoplanets
https://www.uni-heidelberg.de/en/newsroom/carmenes-data-earth-like-planets-especially-common-around-low-mass-stars

#universität #heidelberg #uniheidelberg #astronomie #exoplaneten #sterne

Congratulations to Professor Michela Mapelli! She has received an ERC Advanced Grant for her project "IMBLACK: Intermediate-Mass Black Holes in the Era of Gravitational-Wave Astronomy" awarded by the European Research Council. IMBLACK aims to study the formation of intermediate-mass black holes with a mass ranging from 100 to 10.000 times the mass of our Sun. See https://zah.uni-heidelberg.de/news/detail/michela-mapelli-structures-professor-of-computational-physics-receives-erc-advanced-grant #science #astrophysics #blackholes #Heidelberg
The findings of a team of astronomers lead by Varsha Ramachandran @zah_unihd reshape our understanding of this iconic cosmic duo. Both the black hole and its companion star are significantly lighter than previously thought. See https://zah.uni-heidelberg.de/news/detail/cygnus-x-1-lighter-black-hole-richer-in-heavy-elements #astrophysics #Heidelberg #blackholes

Daten des James Webb Space Telescope enthüllen frühe Strukturen im Universum – Heidelberger Astrophysiker erstellt in internationaler Zusammenarbeit bislang „tiefsten“ Katalog von Galaxiengruppen
https://www.uni-heidelberg.de/de/newsroom/daten-des-james-webb-space-telescope-enthuellen-fruehe-strukturen-im-universum
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Data from the James Webb Space Telescope Reveals Early Structures in the Universe – Heidelberg astrophysicist creates the “deepest” catalog of galaxy groups to date through international collaboration
https://www.uni-heidelberg.de/en/newsroom/data-from-the-james-webb-space-telescope-reveals-early-structures-in-the-universe

#universität #heidelberg #uniheidelberg #astrophysik #galaxien #jameswebbspacetelescope

Daten des James Webb Space Telescope enthüllen frühe Strukturen im Universum

The hidden patterns of cosmic #turbulence were unveiled in a groundbreaking study mapping the magnetic disorder of the Interstellar Medium (ISM), now published @NatureAstronomy. The international team of researchers, including Ralf Klessen https://klessen.org @zah_unihd, explicitly observed that magnetic fields alter the way energy cascades through the ISM, which offers new key insights into the formation of stars. See https://zah.uni-heidelberg.de/news/detail/hidden-patterns-of-cosmic-turbulence-unveiled #astrophysics #Heidelberg #starformation
Ralf Klessen – – personal website –

Interested in "New Tricks for the Analysis of Stellar Spectra"? Then you might want to follow the presentation by Carlos Allende Prieto from the Instituto de Astrofísica de Canarias tomorrow, May 6, 4:30 p.m. See https://zah.uni-heidelberg.de/hjac for more details and online participation in the Heidelberg Joint Astronomy Colloquium (#HJAC) @uniheidelberg.
Heidelberg Joint Astronomical Colloquium (HJAC)

Zentrum für Astronomie

Weekly Update from the Open Journal of Astrophysics – 26/04/2025

It’s Satuday morning once again, and time for another update of papers published at the Open Journal of Astrophysics. Since the last update we have published two papers, which brings the number in Volume 8 (2025) up to 44 and the total so far published by OJAp up to 279.

The first paper to report is “Approximating non-Gaussian Bayesian partitions with normalising flows: statistics, inference and application to cosmology” by Tobias Röspel, Adrian Schlosser & Björn Malte Schäfer (Universität Heidelberg, Germany) which was published on April 23rd 2025 in the folder Cosmology and NonGalactic Astrophysics. It is an introduction to normalizing flows – a machine learning technique for transforming distributions – and its application to the extraction of cosmological parameters from supernova data.

The overlay is here:

You can find the officially accepted version on arXiv here.

The other paper this week is “Dwarf Galaxies in the TNG50 Field: connecting their Star-formation Rates with their Environments” by Joy Bhattacharyya & Annika H.G. Peter (Ohio State University, USA) and Alexie Leauthaud (UC Santa Cruz, USA).  This one was published on 24th April 2025 in the older Astrophysics of Galaxies and it studies dwarf galaxies with properties similar to the Large and Small Magellanic Clouds that form in different environments in the TNG50 simulation of the IllustrisTNG project.

The overlay is here:

 

and you can find the final accepted version on arXiv here.

 

That’s all for this week. I’ll have another update next Saturday.

#arXiv250101946v2 #arXiv250104791v3 #AstrophysicsOfGalaxies #Cosmology #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #dwarfGalaxies #Illustris #MachineLearning #normalizingFlows #OpenJournalOfAstrophysics #TheOpenJournalOfAstrophysics

The Open Journal of Astrophysics

The Open Journal of Astrophysics is an arXiv overlay journal providing open access to peer-reviewed research in astrophysics and cosmology.

A new study by astronomers @zah_unihd and the #CARMENES project https://carmenes.caha.es/ shows that very low-mass stars with less than a sixth of the mass of the Sun are particularly likely to host #earthlikeplanets. On average, there are about two per star, which could significantly increase the chances of finding life-friendly worlds in our cosmic neighborhood. The results have now been published in Astronomy & Astrophysics https://www.aanda.org/. #astrophysics #Heidelberg #earthlikeplanets
CARMENES • Home

Private webpage of CARMENES at CAHA

A breathtaking dive into the formation of galaxy clusters is now possible with #TNGCluster https://www.tng-project.org/cluster/, a new addition to #IllustrisTNG https://www.tng-project.org/. The unique set of simulation data is provided by researchers @zah_unihd and MPIA https://www.mpia.de/de and simulates the evolution of these most massive structures of the universe. As of today, access to the synthetic universe with hundreds of terabytes of data is public at https://www.tng-project.org/data/. #astrophysics #Heidelberg
IllustrisTNG - TNG-Cluster

The IllustrisTNG project. The next generation of cosmological hydrodynamical simulations of galaxy formation and evolution.