Tootfinder

The debris of the ‘last major merger’ is dynamically young: #MilkyWay’s last major collision was surprisingly recent: https://www.esa.int/Science_Exploration/Space_Science/Gaia/Gaia_Milky_Way_s_last_major_collision_was_surprisingly_recent

Most nearby young star clusters formed in three massive complexes: #StarClusters Originate from Only Three "Families": #AAS244 presser gone open access only belatedly. Presser #3 came only with the press releases https://natsci.msu.edu/news/2024-06-flares-and-echoes-from-the-milk-ways-monster-black-hole.aspx and https://greenbankobservatory.org/front-page-news/while-aiming-for-massive-gas-cloud-astronomers-spot-differences-in-thickness-of-milky-way-galaxy/ and no papers).

This https://arxiv.org/abs/2403.09343 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Sensitivity to sub-GeV dark matter from cosmic-ray scattering with very-high-energy gamma-ray observatories
Huge efforts have been deployed to detect dark matter (DM) in the GeV-TeV mass range involving various detection techniques, and led to strong constraints in the available parameter space. We compute here the sensitivity to sub-GeV DM that can be probed from the inevitable cosmic-ray scattering onto DM particles populating the Milky Way halo. Inelastic scattering of energetic cosmic rays off DM would produce high-energy gamma rays in the final state, providing a new avenue to probe the poorly-c…

Self-interacting #DarkMatter Interpretation of Crater II: https://iopscience.iop.org/article/10.3847/2041-8213/ad50cd -> How did a satellite galaxy of the Milky Way come to be? https://news.ucr.edu/articles/2024/06/11/how-did-satellite-galaxy-milky-way-come-be

Shiva and Shakti - Presumed Proto-Galactic Fragments in the Inner #MilkyWay: https://iopscience.iop.org/article/10.3847/1538-4357/ad1885 -> How the Webb and Gaia missions bring a new perspective on galaxy formation: https://arstechnica.com/science/2024/06/how-the-webb-and-gaia-missions-bring-a-new-perspective-on-galaxy-formation/

Polarization Properties of 128 Nonrepeating #FastRadioBursts from the First CHIME/FRB Baseband Catalog: https://iopscience.iop.org/article/10.3847/1538-4357/ad40aa -> Study detailing the properties of polarized light from 128 non-repeating FRBs reveals mysterious cosmic explosions originate in far-away galaxies like our own Milky Way: https://www.eurekalert.org/news-releases/1047594 -> Polarized light yields fresh insight into mysterious fast radio bursts: https://arstechnica.com/science/2024/06/polarized-light-yields-fresh-insight-into-mysterious-fast-radio-bursts/

This https://arxiv.org/abs/2404.02874 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Planck dust polarization power spectra are consistent with strongly supersonic turbulence
The polarization of the Cosmic Microwave Background (CMB) is rich in information but obscured by foreground emission from the Milky Way's interstellar medium (ISM). To uncover relationships between the underlying turbulent ISM and the foreground power spectra, we simulated a suite of driven, magnetized, turbulent models of the ISM, varying the fluid properties via the sonic Mach number, $\mathcal{M_S}$ and magnetic (Alfvén) Mach number,$\mathcal{M_A}$. We measure the power spectra of density (…