Senza materia oscura e senza modello standard. Il James Webb non conferma il Modello Standard. Le galassie nell’Universo primordiale sono nate, evolute e cresciute più rapidamente di quello che le attuali teorie ammettono.
Le predizioni fatte dal ‘Lambda- Cold Dark Matter‘, il modello cosmologico teorico più condiviso dalla comunità astronomica, non collimano con le scansioni dell’Universo ...

#ColdDarkMatter‘ #JamesWebb #LambdaCDM #materiaoscura #ModelloStandard‘

https://scienzamagia.eu/scienza-tecnologia/senza-materia-oscura-e-senza-modello-standard/

It’s Saturday so it’s time once again for another roundup of business at the  Open Journal of Astrophysics. After last week’s summer lull, this week I have three papers to announce, which brings the total we have published so far this year (Vol. 7) to 67 and the total published by OJAp to 182.

First one up, published on 7th August 2024, is “Brightest Cluster Galaxy Offsets in Cold Dark Matter” by Jonathan Katz of Washington University (St Louis, Missouri, USA),  a simulation-based study of the distribution of the position of brightest cluster galaxies relative to the dark matter distribution and its possible use as a cosmological probe.  The authors are Cian Roche (MIT), Michael McDonald (MIT), Josh Borrow (MIT), Mark Vogelsberger (MIT), Xuejian Shen (MIT), Volker Springel (MPA Garching), Lars Hernquist (Harvard), Ruediger Pakmor (Harvard), Sownak Bose (Durham, UK) and Rahul Kannan (York U., Canada). This paper is in the folder marked Astrophysics of Galaxies.

Here is a screen grab of the overlay, which includes the abstract:

You can read the paper directly on arXiv here.

The second paper to present is “LAMOST J1010+2358 is not a Pair-Instability Supernova Relic” by five authors based in the USA: Pierre Thibodeaux (Chicago), Alexander P. Ji (Chicago), William Cerny (Yale), Evan N. Kirby (Notre Dame) and Joshua D. Simon (Carnegie Observatories) .  As the title makes clear, the paper presents arguments against previous claims that a particular star is not a pair-instability supernova relic. This paper is in the folder marked Solar and Stellar Astrophysics. It was published on Friday August 9th 2024.

The overlay looks like this:

You can read this paper directly on the arXiv here.

Last, but by no means least, comes  “A Pilot Search for Gravitational Self-Lensing Binaries with the Zwicky Transient Facility“, results of a trial search for signals of gravitational lensing of one component in a binary system by a compact companion, with a discussion of future prospects for larger surveys. This one, which was also published on 9th August, is in the folder marked High-Energy Astrophysical Phenomena. The authors are Allison Crossland & Eric C Bellm (U. Washington), Courtney Klein (UC Irvine), James R. A. Davenport (U. Washington), Thomas Kupfer (Hamburg Observatory) and Steven L. Groom, Russ R. Laher & Reed Riddle (Caltech).

Here is a screengrab of the overlay:

To read the accepted version of this on the arXiv please go here.

That’s it for this week. I hope to post another update next weekend.

https://telescoper.blog/2024/08/10/three-new-publications-at-the-open-journal-of-astrophysics-10/

#arXiv231117862v2 #arXiv240200928v3 #arXiv240417078v2 #AstrophysicsOfGalaxies #binarySystems #BrightestClusterGalaxies #ColdDarkMatter #compactObjects #Cosmology #GravitationalLensing #HighEnergyAstrophysicalPhenomena #LAMOSTJ10102358 #pairInstabilitySupernova #SolarAndStellarAstrophysics #ZwickyTransientFacility

https://zenodo.org/records/8384872

#Meme #Physics #Quantum #Science #ColdDarkMatter #AstroPhysics