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20242026
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astro-ph.GA2026

EROSE: An algorithm searching for resolved Local Group satellites. The impact of combining different photometric bands on the detectability of Milky Way satellites in the LSST

Samuel Rusterucci, Nicolas F. Martin, Else Starkenburg

Systematic searches for ultra-faint Milky Way satellite galaxies typically combine local density estimators with colour-magnitude cuts, which are usually performed in 2D and have r…

astro-ph.GA2026

Tracing the very early disruption of the Sagittarius dwarf galaxy in the distant Milky Way halo

Manuel Bayer, Else Starkenburg, Akshara Viswanathan +3

Current models predict that at distances beyond 80 kpc in the Milky Way halo, we can find the earliest escaped stars from the merging Sagittarius dwarf galaxy. However, observation…

astro-ph.GA2026

The Pristine Dwarf Galaxy Survey -- VII. The metallicity distributions of 12 Milky Way faint satellites

S. Taibi, P. Jablonka, N. Longeard +10

Spectroscopic studies of ultra-faint dwarf galaxies are typically limited to small samples of stars due to the scarcity of sufficiently bright targets. The small number statistics…

astro-ph.GA2026

Temperature asymmetry in the Milky Way's hot circumgalactic medium induced by the Magellanic Clouds

Alexandru Oprea, Filippo Fraternali, Else Starkenburg +2

The Milky Way is surrounded by a hot diffuse circumgalactic medium (CGM) with temperatures of millions of degrees. Recent X-ray observations with the eROSITA satellite discovered a…

astro-ph.GA2026

An ancient system hidden in the Galactic plane?

Federico Sestito, Emma Fernandez-Alvar, Rebecca Brooks +19

We analyse high signal-to-noise ESPaDOnS/CFHT spectra of 20 very metal-poor stars (VMP; [Fe/H]~) in the solar neighbourhood (within kpc), selected to be on planar or…

astro-ph.GA2026

The primordial nature of the C-19 stellar stream

Kim A. Venn, Zhen Yuan, Nicolas F. Martin +32

Stellar streams, remnants of compact star systems stretched out by the tidal forces of the Milky Way, offer a unique way to study stellar populations that formed billions of years…