Tootfinder

»Social Media: Welche Plattformen nutzt ihr und was macht das mit euch?
Soziale Netzwerke und Medien sind ein beliebter Streitpunkt: Die einen richten ihr Leben nach ihnen und finden einen Quell schier unerschöpflicher Unterhaltung, die anderen verteufeln sie und sehen die Wurzel allen Übels der modernen Welt […]«
Ich nutze nur das Fediverse um mich über die anderen Social-Media's zu beschweren!1!
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Social Media: Welche Plattformen nutzt ihr und was macht das mit euch?
Auf welchen Social-Media-Plattformen seid ihr wie lang und wieso unterwegs? Und welche positiven oder negativen Emotionen löst das aus?

X-ray Halos of Early-Type Galaxies with AGN Feedback and Accretion from a Circumgalactic Medium: models and observations
Silvia Pellegrini (Dept. of Physics and Astronomy, Bologna University, Italy), Luca Ciotti (Dept. of Physics and Astronomy, Bologna University, Italy), Zhaoming Gan (New Mexico Consortium, Los Alamos, NM, USA), Dong-Woo Kim (Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA), Jeremiah P. Ostriker (Dept. of Astronomy, Columbia University, NY, USA)

X-ray Halos of Early-Type Galaxies with AGN Feedback and Accretion from a Circumgalactic Medium: models and observations
The knowledge of the X-ray properties of the hot gas halos of early-type galaxies has significantly advanced in the past years, for large and homogeneously investigated samples. We compare these results with the X-ray properties of an exploratory set of gas evolution models in realistic early-type galaxies, produced with our high-resolution 2D hydrodynamical code MACER that includes AGN feedback and accretion from a circumgalactic medium. The model X-ray emission and absorption are integrated a…

This https://arxiv.org/abs/2407.16876 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Associations Between Scattering Screens and Interstellar Medium Filaments
Pulsar scintillation can be used to measure small scale structure in the Galaxy, but little is known about the specific interstellar medium features that cause scintillation. We searched for interstellar medium counterparts to all scintillation screens for which absolute distances and scattering orientations have been measured - a sample of 12 pulsars and 22 screens. For one pulsar, PSR J0737-3039A, we re-analyze its scintillation screen and find evidence for a highly anisotropic screen. Among …

Klitschko mit Menschenrechtspreis geehrt
Der Bürgermeister der ukrainischen Hauptstadt Kiew und frühere Boxweltmeister Vitali Klitschko ist in der Frankfurter Paulskirche mit dem Franz-Werfel-Menschenrechtspreis 2025 geehrt worden. Klitschko erhalte die Auszeichnung für "seinen unermüdlichen Einsatz für Freiheit, Demokratie und Menschenrechte", begründete die Stiftung "Zentrum gegen Vertreibungen" d…
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"Heldenhafter Mut": Klitschko in Frankfurter Paulskirche geehrt
Als Bürgermeister von Kiew trägt Vitali Klitschko seit Beginn des russischen Angriffskriegs Verantwortung für eine Stadt im Ausnahmezustand. Jetzt wurde er in der Frankfurter Paulskirche für seinen Einsatz für Demokratie und Menschenrechte ausgezeichnet.

The environment of TeV halo progenitors
Lioni-Moana Bourguinat, Carmelo Evoli, Pierrick Martin, Sarah Recchia
https://arxiv.org/abs/2507.01495 https://

The environment of TeV halo progenitors
TeV halos are extended very-high-energy gamma-ray sources found around some middle-aged pulsars. The emission spanning several tens of parsecs suggests an efficient confinement of the ultra-relativistic lepton pairs produced by pulsars in their vicinity. The physical mechanism responsible for this suppressed transport has not yet been identified. In some scenarios, pair confinement may be linked to the medium the pulsars are located in. We aim at understanding which type of medium pulsars are p…

Ma monture Skywatcher neq6. Ça faisait des mois qu'elle faisait tactactac, inutilisable. Ce matin avec mon voisin on a bricolé dedans (enfin surtout lui, j'y connais rien).
Depuis elle tourne comme une horloge. Ça sert aussi Š ça, les rencontres astronomiques, Š retrouver les copains, et les coups de mains!
Mise en station Š l'arrache, au pif, résultat, le soleil est toujours centré après plusieurs heures de suivi.

Scintillation Properties of PSR B1133 16 Measured with Very Long Baseline Interferometry
Ashley M. Stock, Fardin Syed, Marten H. van Kerkwijk, Rebecca Lin, Franz Kirsten, Ue-Li Pen
https://arxiv.org/abs/2506.02165

Scintillation Properties of PSR B1133+16 Measured with Very Long Baseline Interferometry
The scintillation of pulsars reveals small-scale structure of the interstellar medium. A powerful technique for characterizing the scintillating structures (screens) combines analysis of scintillation arcs and very long baseline interferometry (VLBI). We present the results of a VLBI analysis of the scintillation arcs of PSR B1133+16 from simultaneous observations with Arecibo, VLA, Jodrell Bank, Effelsberg, and Westerbork. Three arcs appear in the data set, all of which appear consistent…

This https://arxiv.org/abs/2411.04869 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Modelling of the atomic lines' emission of fast moving pulsar nebulae
Bow shocks generated by pulsars moving through weakly ionized interstellar medium (ISM) produce emission dominated by non-equilibrium atomic transitions. These bow shocks are primarily observed as H$_α$ nebulae. We developed a package, named Shu, that calculates non-LTE intensity maps in more than 150 spectral lines, taking into account geometrical properties of the pulsars' motion and lines of sight. We argue here that atomic (CI, NI, OI) and ionic (SII, NII, OIII, NeIV) transitions can be us…

Towards Modelling AR Sco: Calibration -- Reproducing High-Energy Pulsar Emission and Testing Convergence to Aristotelian Electrodynamics
Louis Du Plessis, Christo Venter, Alice K. Harding, Zorawar Wadiasingh, Constantinos Kalapotharakos
https://arxiv.org/abs/2506.18917

Towards Modelling AR Sco: Calibration -- Reproducing High-Energy Pulsar Emission and Testing Convergence to Aristotelian Electrodynamics
In recent years, kinetic simulations have been crucial to further our understanding of pulsar electrodynamics. Yet, due to the large-scale separation between the gyro-period vs the stellar rotation period, resolving the particle gyration has been computationally unfeasible for realistic pulsar parameters. The main aim of this work is comparing our gyro-phase-resolved model with a gyro-centric pulsar model, where our model solves the general equations of motion with included radiation reaction u…

The Northern Cross Fast Radio Burst project: V. Search for transient radio emission from Galactic magnetars
A. Geminardi, P. Esposito, G. Bernardi, M. Pilia, D. Pelliciari, G. Naldi, D. Dallacasa, R. Turolla, L. Stella, F. Perini, F. Verrecchia, C. Casentini, M. Trudu, R. Lulli, A. Maccaferri, A. Magro, A. Mattana, G. Bianchi, G. Pupillo, C. Bortolotti, M. Tavani, M. Roma, M. Schiaffino, G. Setti

The Northern Cross Fast Radio Burst project: V. Search for transient radio emission from Galactic magnetars
Context. The radio emission from magnetars is poorly understood and poorly characterized observationally, in particular for what concerns single pulses and sporadic events. The interest in it was boosted by the detection in 2020 of an extremely bright ms radio signal from the Galactic magnetar designated Soft Gamma Repeater (SGR) SGR J1935+2154, which occurred almost simultaneously with a typical magnetar short burst of X-rays. As of now, this event remains the Galactic radio pulse that is the …