activity
20232026
most citedHSTPROMO Internal Proper Motion Kinematics of Dwarf Spheroidal Galaxies: II. Velocity Anisotropy and Dark Matter Cusp Slope of Sculptor

5 citations · 5 across the 14 of their papers we have counts for

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astro-ph.GA2026

Hidden in the Halo: New Diffuse Star Clusters in the M82 Starburst with JWST

Deepthi S. Prabhu, David J. Sand, Burcin Mutlu-Pakdil +12

Diffuse star clusters (DSCs) occupy a poorly explored region of the size-luminosity plane between classical globular clusters (GCs) and dwarf galaxies. Here we report the discovery…

astro-ph.GA2026

Discovery, Characterization, and Potential Origins of a Stream in the Stellar Halo of Nearby LMC-Mass Galaxy NGC 55

Benjamin N. Velguth, Burçin Mutlu-Pakdil, Erik Tollerud +33

We present a previously undetected stellar stream in the halo of the LMC-mass dwarf galaxy NGC 55 (2 Mpc), as part of an ongoing effort to characterize the stellar halos of LMC/SMC…

astro-ph.IM2026

The James Webb Space Telescope Absolute Flux Calibration. VI. Near-Infrared Camera Imaging and Coronagraphy

Martha L. Boyer, Benjamin Sunnquist, Bryan Hilbert +4

We present an updated flux calibration for all imaging modes of the Near-Infrared Camera on JWST that converts instrumental units to physical surface brightness units of MJy sr^-1.…

astro-ph.GA2026

Deep Imaging of Grus II and Horologium II: Structure and Extent of Two Ultra-Faint Milky Way Satellites

Deepthi S. Prabhu, David J. Sand, Anirudh Chiti +29

We present deep, wide-field Magellan/Megacam imaging of the ultra-faint Milky Way (MW) satellites Grus II (Gru II) and Horologium II (Hor II), with the aim of deriving improved con…

astro-ph.GA2026

Reconstructing the orbits of Milky Way dwarf galaxies: A Large Magellanic Cloud perspective

Alberto Manuel Martínez-García, Andrés del Pino, Roeland P. van der Marel +14

The orbital histories of the dwarf satellites of the Milky Way (MW) are key to understanding their evolution and placing their present-day properties in a dynamical context. We pre…

astro-ph.IM2026

Hubble Astrometry for the Local Group and Beyond in the 2030s

S. Tony Sohn, Paul Bennet, Kevin Andrew McKinnon +23

Hubble's long, stable astrometric baseline creates a rare opportunity for discovery in the Local Group and beyond. Many nearby galaxies, streams, and star clusters already have arc…

astro-ph.GA2026

ID-MAGE II: The Star Forming Satellites of Low-Mass Hosts

Laura Congreve Hunter, Burçin Mutlu-Pakdil, Michael B. Farnell +14

We present results from our ongoing campaign to follow up the satellite candidates from the Identifying Dwarfs of MC Analog GalaxiEs (ID-MAGE) survey. Previously, we published a li…

astro-ph.GA2026

Encounters Between M33 and Present-Day M31 Satellites Hint at a Previous Group Accretion

Ekta Patel, Paul Bennet, Sangmo Tony Sohn +2

This work investigates whether two known Andromeda (M31) satellites, Pisces (LGS 3) and Andromeda XVI, have interacted with M33, M31's most massive satellite. CDM predictions im…