Tootfinder

Formation process of young stellar population in Messier 16 from a kinematic perspective
Beomdu Lim, Hyeong-Sik Yun, Hyun-Jeong Kim, Yuna Lee, Jae-Rim Koo, Jongsuk Hong, Heeyoung Oh
https://arxiv.org/abs/2508.08666

Formation process of young stellar population in Messier 16 from a kinematic perspective
We present a kinematic study of young stars in Messier 16 (M16) using the Gaia Data Release 3 and high-resolution spectra. A total of 345 stars are selected as genuine members using the published lists of X-ray, infrared sources, and early-type stars as well as the Gaia data. There is severe differential reddening across this region and the reddening law of the intracluster medium appears abnormal. The distance to M16, derived from the parallaxes of the members, is about 1.7 kpc. The ages of me…

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Lido Pimienta:
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Electromagnetic Observables of Weakly Collisional Black Hole Accretion
Vedant Dhruv, Ben Prather, Mani Chandra, Abhishek V. Joshi, Charles F. Gammie
https://arxiv.org/abs/2510.11365

Electromagnetic Observables of Weakly Collisional Black Hole Accretion
The black holes in the Event Horizon Telescope sources Messier 87* and Sagittarius A* (SgrA*) are embedded in a hot, collisionless plasma that is fully described in kinetic theory yet is usually modeled as an ideal, magnetized fluid. In this Letter, we present results from a new set of weakly collisional fluid simulations in which leading order kinetic effects are modeled as viscosity and heat conduction. Consistent with earlier, lower-resolution studies, we find that overall flow dynamics rema…

EU Commission president Von der Leyen, yesterday:
"Today's deal creates certainty in uncertain times. It delivers stability and predictability, for citizens and businesses on both sides of the Atlantic."
Trump regime: "Not so fast."
Thread on Bluesky: https://

Tracing Planetary Accretion in a 3 Gyr-old Hydrogen-Rich White Dwarf: The Extremely Polluted Atmosphere of LSPM J0207 3331
\'Erika Le Bourdais, Patrick Dufour, Carl Melis, Beth L. Klein, Laura K. Rogers, Antoine B\'edard, John Debes, Ashley Messier, Alycia J. Weinberger, Siyi Xu
https://arxiv.org/abs/2510.08676

Tracing Planetary Accretion in a 3 Gyr-old Hydrogen-Rich White Dwarf: The Extremely Polluted Atmosphere of LSPM J0207+3331
We report the detection of 13 heavy elements (Na, Mg, Al, Si, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, and Sr) in the photosphere of LSPM J0207+3331, a ~3 Gyr old hydrogen-rich white dwarf with an effective temperature comparable to that of the Sun. Upper limits on carbon, obtained through the absence of molecular CH, suggest accretion from a carbon-volatile-depleted source. The accreted parent body exhibits slight deficits of Mg and Si relative to Fe but otherwise bulk Earth-like abundance patterns; a …

Unveiling the Sagittarius Dwarf Spheroidal Galaxy Core with Gaia DR3
Ellie K. H. Toguchi-Tani, Daniel R. Hey, Thomas de Boer, Peter M. Frinchaboy, Daniel Huber
https://arxiv.org/abs/2507.20212

Unveiling the Sagittarius Dwarf Spheroidal Galaxy Core with Gaia DR3
The Sagittarius dwarf spheroidal galaxy provides us with the unique opportunity to study an ongoing Galactic cannibalistic event between our Milky Way Galaxy and a satellite dwarf galaxy. We present the first major membership star catalog of the Sagittarius dwarf core ($\approx$400,000 sources) and Messier 54 ($\approx$2000 sources) with positions, proper motions, and parallaxes from $Gaia$ DR3, supplemented with metallicities from the Apache Point Observatory Galactic Evolution Experiment. We …