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Rubin Observatory LSST Stars Milky Way and Local Volume Star Clusters Roadmap
Christopher Usher, Kristen C. Dage, Léo Girardi +26
The Vera C. Rubin Observatory will undertake the Legacy Survey of Space and Time, providing an unprecedented, volume-limited catalog of star clusters in the Southern Sky, including…
Extragalactic Star Cluster Science with the Nancy Grace Roman Space Telescope's High Latitude Wide Area Survey and the Vera C. Rubin Observatory
Kristen C. Dage, Christopher Usher, Jennifer Sobeck +22
The Nancy Grace Roman Telescope's High Latitude Wide Area Survey will have a number of synergies with the Vera Rubin Observatory's Legacy Survey of Space and Time (LSST), particula…
RomAndromeda: The Roman Survey of the Andromeda Halo
Arjun Dey, Joan Najita, Carrie Filion +50
As our nearest large neighbor, the Andromeda Galaxy provides a unique laboratory for investigating galaxy formation and the distribution and substructure properties of dark matter…
Modeling the chemical enrichment history of the Bulge Fossil Fragment Terzan 5
Donatella Romano, Francesco R. Ferraro, Livia Origlia +9
Terzan 5 is a heavily obscured stellar system located in the inner Galaxy. It has been postulated to be a stellar relic, a Bulge Fossil Fragment witnessing the complex history of t…
First evidence of multi-iron sub-populations in the Bulge Fossil Fragment candidate Liller 1
Chiara Crociati, Elena Valenti, Francesco R. Ferraro +8
In the context of a project aimed at characterizing the properties of the so-called Bulge Fossil Fragments (the fossil remnants of the bulge formation epoch), here we present the f…
A giant thin stellar stream in the Coma Galaxy Cluster
Javier Román, R. Michael Rich, Niusha Ahvazi +7
The study of dynamically cold stellar streams reveals information about the gravitational potential where they reside and provides important constraints on dark matter properties.…
Detailed abundance trends in the inner Galactic bulge
N. Nieuwmunster, G. Nandakumar, E. Spitoni +7
In this paper, we aim to derive high-precision alpha-element abundances using CRIRES high-resolution IR spectra of 72 cool M giants of the inner Galactic bulge. Silicon, magnesium,…
Andromeda XXV -- a dwarf galaxy with a low central dark matter density
Emily J. E. Charles, Michelle L. M. Collins, R. Michael Rich +7
Andromeda (And) XXV has previously been reported as a dwarf spheroidal galaxy (dSph) with little-to-no dark matter. However, the uncertainties on this result were significant. In t…
Blanco DECam Bulge Survey (BDBS) IV: Metallicity Distributions and Bulge Structure from 2.6 Million Red Clump Stars
Christian I. Johnson, R. Michael Rich, Iulia T. Simion +12
We present photometric metallicity measurements for a sample of 2.6 million bulge red clump stars extracted from the Blanco DECam Bulge Survey (BDBS). Similar to previous studies,…
Blanco DECam Bulge Survey (BDBS) V. Cleaning the foreground populations from Galactic bulge colour-magnitude diagrams using Gaia EDR3
Tommaso Marchetti, Christian I. Johnson, Meridith Joyce +8
The Blanco DECam Bulge Survey (BDBS) has imaged more than 200 square degrees of the southern Galactic bulge, providing photometry in the ugrizy filters for million uniqu…
The Hubble Space Telescope Survey of M31 Satellite Galaxies I. RR Lyrae-based Distances and Refined 3D Geometric Structure
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman +33
We measure homogeneous distances to M31 and 38 associated stellar systems (16.8 6.0), using time-series observations of RR Lyrae stars taken as part of the Hubbl…
The nature of the Eastern Extent in the outer halo of M31
Janet Preston, Michelle Collins, R. Michael Rich +3
We present the first comprehensive spectroscopic study of the Andromeda galaxy's Eastern Extent. This ~4 degree long filamentary structure. located 70-90 kpc from the centre of M31…
Quantified diffuse light in compact groups of galaxies
Denis Poliakov, Aleksandr V. Mosenkov, Noah Brosch +2
The vast majority of stars in galaxy groups are contained within their constituent galaxies. Some small fraction of stars is expected, however, to follow the global dark matter pot…
Andromeda XXI -- a dwarf galaxy in a low density dark matter halo
Michelle L. M. Collins, Justin I. Read, Rodrigo A. Ibata +6
Andromeda XXI (And XXI) has been proposed as a dwarf spheroidal galaxy with a central dark matter density that is lower than expected in the Standard Cold Dark Matter (CDM)…
A Photometric and Kinematic Analysis of UDG1137+16 (dw1137+16): Probing Ultra-Diffuse Galaxy Formation in a Group Environment
Jonah S. Gannon, Bililign T. Dullo, Duncan A. Forbes +6
The dominant physical formation mechanism(s) for ultra-diffuse galaxies (UDGs) is still poorly understood. Here, we combine new, deep imaging from the Jeanne Rich Telescope with de…
Blanco DECam Bulge Survey (BDBS) III: A new view of the double red clump in the Milky Way bulge through luminosity and color distribution
Dongwook Lim, Andreas J. Koch-Hansen, Chul Chung +9
Red clump (RC) stars are one of the best stellar tracers of the structure of the Milky Way (MW) bulge. Here we report a new view of the double RC through luminosity and color distr…
A new class of fossil fragments from the hierarchical assembly of the Galactic bulge
F. R. Ferraro, C. Pallanca, B. Lanzoni +12
The formation and evolutionary processes of galaxy bulges are still unclear, and the presence of young stars in the bulge of the Milky Way is largely debated. We recently demonstra…
Ground Vibrational State SiO Emission in the VLA BAaDE Survey
V. Dike, M. R. Morris, R. M. Rich +5
Using a subsample of the Bulge Asymmetries and Dynamical Evolution (BAaDE) survey of stellar SiO masers, we explore the prevalence and characteristics of SiO em…
Blanco DECam Bulge Survey (BDBS) II: Project Performance, Data Analysis, and Early Science Results
Christian I. Johnson, R. Michael Rich, Michael D. Young +7
The Blanco DECam Bulge Survey (BDBS) imaged more than 200 square degrees of the Southern Galactic bulge using the ugrizY filters of the Dark Energy Camera, and produced point sprea…
Detailed abundances in the Galactic center: Evidence of a metal-rich alpha-enhanced stellar population
B. Thorsbro, N. Ryde, R. M. Rich +8
We present a detailed study of the composition of 20 M giants in the Galactic center with 15 of them confirmed to be in the Nuclear Star Cluster. As a control sample we have also o…
The Halos and Environments of Nearby Galaxies (HERON) II: The outer structure of edge-on galaxies
Aleksandr Mosenkov, R. Michael Rich, Andreas Koch +6
The HERON project is aimed at studying halos and low surface brightness details near galaxies. In this second HERON paper we consider in detail deep imaging (down to surface bright…
A detailed study of Andromeda XIX, an extreme local analogue of ultra diffuse galaxies
Michelle L. M. Collins, Erik J. Tollerud, R. Michael Rich +5
With a central surface brightness of mag. per sq. arcsec, and half-light radius of ~kpc, Andromeda XIX (And XIX) is an extremely diffuse…
Comparing the Quenching Times of Faint M31 and Milky Way Satellite Galaxies
Daniel R. Weisz, Nicolas F. Martin, Andrew E. Dolphin +8
We present the star formation histories (SFHs) of 20 faint M31 satellites () that were measured by modeling sub-horizontal branch (HB) depth color-mag…
A Dwarf Disrupting -- Andromeda XXVII and the North West Stream
Janet Preston, Michelle L. M. Collins, Rodrigo A. Ibata +10
We present a kinematic and spectroscopic analysis of 38 red giant branch stars, in 7 fields, spanning the dwarf spheroidal galaxy Andromeda XXVII and the upper segment of the North…