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The Distance to the S147 Supernova Remnant

The Astrophysical Journal
2024-06-01 | Journal article
DOI: 10.3847/1538-4357/ad4493
Contributors: C. S. Kochanek; John C. Raymond; Nelson Caldwell
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The Faint Satellite System of NGC 253: Insights into Low-density Environments and No Satellite Plane*

The Astrophysical Journal
2024-05-01 | Journal article
DOI: 10.3847/1538-4357/ad36c4
Contributors: Burçin Mutlu-Pakdil; David J. Sand; Denija Crnojević; Paul Bennet; Michael G. Jones; Kristine Spekkens; Ananthan Karunakaran; Dennis Zaritsky; Nelson Caldwell; Catherine E. Fielder et al.
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Discovery of the Magellanic Stellar Stream Out to 100 kpc

The Astrophysical Journal
2023-10-01 | Journal article
DOI: 10.3847/1538-4357/acf7bf
Contributors: Vedant Chandra; Rohan P. Naidu; Charlie Conroy; Ana Bonaca; Dennis Zaritsky; Phillip A. Cargile; Nelson Caldwell; Benjamin D. Johnson; Jiwon Jesse Han; Yuan-Sen 源森 Ting 丁
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A Nitrogen-rich Supernova Remnant in M31: Interaction with the Circumstellar Medium at Late Times

The Astrophysical Journal
2023-09-01 | Journal article
DOI: 10.3847/1538-4357/acebdb
Contributors: Nelson Caldwell; John C. Raymond
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Abundance Analysis of Stars at Large Radius in the Sextans Dwarf Spheroidal Galaxy*

The Astrophysical Journal
2023-09-01 | Journal article
DOI: 10.3847/1538-4357/ace3c1
Contributors: Ian U. Roederer; Andrew B. Pace; Vinicius M. Placco; Nelson Caldwell; Sergey E. Koposov; Mario Mateo; Edward W. Olszewski; Matthew G. Walker
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Magellan/M2FS and MMT/Hectochelle Spectroscopy of Dwarf Galaxies and Faint Star Clusters within the Galactic Halo*

The Astrophysical Journal Supplement Series
2023-09-01 | Journal article
DOI: 10.3847/1538-4365/acdd79
Contributors: Matthew G. Walker; Nelson Caldwell; Mario Mateo; Edward W. Olszewski; Andrew B. Pace; John I. Bailey, III; Sergey E. Koposov; Ian U. Roederer
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The Cygnus Loop: Shock Precursors and Electron–Ion Equilibration

The Astrophysical Journal
2023-09-01 | Journal article
DOI: 10.3847/1538-4357/ace692
Contributors: John C. Raymond; Ji Yeon Seok; Bon-Chul Koo; Igor V. Chilingarian; Kirill Grishin; Nelson Caldwell; Min Xie; Robert Fesen
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New Velocity Measurements of NGC 5128 Globular Clusters Out to 130 kpc: Outer Halo Kinematics, Substructure, and Dynamics*

The Astrophysical Journal
2023-04-01 | Journal article
DOI: 10.3847/1538-4357/acbf43
Contributors: Allison K. Hughes; David J. Sand; Anil Seth; Jay Strader; Chris Lidman; Karina Voggel; Antoine Dumont; Denija Crnojević; Mario Mateo; Nelson Caldwell et al.
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A Ghost in Boötes: The Least-Luminous Disrupted Dwarf Galaxy

The Astrophysical Journal
2022-12-01 | Journal article
DOI: 10.3847/1538-4357/ac9b4b
Contributors: Vedant Chandra; Charlie Conroy; Nelson Caldwell; Ana Bonaca; Rohan P. Naidu; Dennis Zaritsky; Phillip A. Cargile; Jiwon Jesse Han; Benjamin D. Johnson; Joshua S. 佳士 Speagle 沈 et al.
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Milky Way's Eccentric Constituents with Gaia, APOGEE, and GALAH

The Astrophysical Journal
2022-10-01 | Journal article
DOI: 10.3847/1538-4357/ac8d68
Contributors: G. C. Myeong; Vasily Belokurov; David S. Aguado; N. Wyn Evans; Nelson Caldwell; James Bradley
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A Tilt in the Dark Matter Halo of the Galaxy

The Astrophysical Journal
2022-07-01 | Journal article
DOI: 10.3847/1538-4357/ac795f
Contributors: Jiwon Jesse Han; Rohan P. Naidu; Charlie Conroy; Ana Bonaca; Dennis Zaritsky; Nelson Caldwell; Phillip Cargile; Benjamin D. Johnson; Vedant Chandra; Joshua S. 佳 士 Speagle 沈 et al.
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A Population of Luminous Globular Clusters and Stripped Nuclei with Elevated Mass to Light Ratios around NGC 5128*

The Astrophysical Journal
2022-04-01 | Journal article
DOI: 10.3847/1538-4357/ac551c
Contributors: Antoine Dumont; Anil C. Seth; Jay Strader; Karina Voggel; David J. Sand; Allison K. Hughes; Nelson Caldwell; Denija Crnojević; Mario Mateo; John I. Bailey, III et al.
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Hubble Space Telescope Observations of NGC 253 Dwarf Satellites: Three Ultra-faint Dwarf Galaxies*

The Astrophysical Journal
2022-02-01 | Journal article
DOI: 10.3847/1538-4357/ac4418
Contributors: Burçin Mutlu-Pakdil; David J. Sand; Denija Crnojević; Michael G. Jones; Nelson Caldwell; Puragra Guhathakurta; Anil C. Seth; Joshua D. Simon; Kristine Spekkens; Jay Strader et al.
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Detection of a 100,000 M ⊙ black hole in M31's Most Massive Globular Cluster: A Tidally Stripped Nucleus

The Astrophysical Journal
2022-01-01 | Journal article
DOI: 10.3847/1538-4357/ac339f
Contributors: Renuka Pechetti; Anil Seth; Sebastian Kamann; Nelson Caldwell; Jay Strader; Mark den Brok; Nora Luetzgendorf; Nadine Neumayer; Karina Voggel
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Hubble Space Telescope Imaging of Isolated Local Volume Dwarfs GALFA Dw3 and Dw4

The Astrophysical Journal
2022-01-01 | Journal article
DOI: 10.3847/1538-4357/ac356c
Contributors: P. Bennet; D. J. Sand; D. Crnojević; D. R. Weisz; N. Caldwell; P. Guhathakurta; J. R. Hargis; A. Karunakaran; B. Mutlu-Pakdil; E. Olszewski et al.
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Reconstructing the Last Major Merger of the Milky Way with the H3 Survey

The Astrophysical Journal
2021-12-01 | Journal article
DOI: 10.3847/1538-4357/ac2d2d
Contributors: Rohan P. Naidu; Charlie Conroy; Ana Bonaca; Dennis Zaritsky; Rainer Weinberger; Yuan-Sen 源森 Ting 丁; Nelson Caldwell; Sandro Tacchella; Jiwon Jesse Han; Joshua S. Speagle et al.
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Spectroscopic Confirmation of the Sixth Globular Cluster in the Fornax Dwarf Spheroidal Galaxy*

The Astrophysical Journal
2021-12-01 | Journal article
DOI: 10.3847/1538-4357/ac2cd2
Contributors: Andrew B. Pace; Matthew G. Walker; Sergey E. Koposov; Nelson Caldwell; Mario Mateo; Edward W. Olszewski; John I. Bailey III; Mei-Yu Wang
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Resolved Dwarf Galaxy Searches within ∼5 Mpc with the Vera Rubin Observatory and Subaru Hyper Suprime-Cam*

The Astrophysical Journal
2021-09-01 | Journal article
DOI: 10.3847/1538-4357/ac0db8
Contributors: Burçin Mutlu-Pakdil; David J. Sand; Denija Crnojević; Alex Drlica-Wagner; Nelson Caldwell; Puragra Guhathakurta; Anil C. Seth; Joshua D. Simon; Jay Strader; Elisa Toloba
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NGC 5128 Globular Cluster Candidates Out to 150 kpc: A Comprehensive Catalog from Gaia and Ground-based Data*

The Astrophysical Journal
2021-06-01 | Journal article
DOI: 10.3847/1538-4357/abf63c
Contributors: Allison K. Hughes; David J. Sand; Anil Seth; Jay Strader; Karina Voggel; Antoine Dumont; Denija Crnojević; Nelson Caldwell; Duncan A. Forbes; Joshua D. Simon et al.
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Orbital Clustering Identifies the Origins of Galactic Stellar Streams

The Astrophysical Journal Letters
2021-03-01 | Journal article
DOI: 10.3847/2041-8213/abeaa9
Contributors: Ana Bonaca; Rohan P. Naidu; Charlie Conroy; Nelson Caldwell; Phillip A. Cargile; Jiwon Jesse Han; Benjamin D. Johnson; J. M. Diederik Kruijssen; G. C. Myeong; Joshua S. Speagle et al.
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Ancient Very Metal-poor Stars Associated with the Galactic Disk in the H3 Survey

The Astrophysical Journal
2021-02-01 | Journal article
DOI: 10.3847/1538-4357/abcda4
Contributors: Courtney Carter; Charlie Conroy; Dennis Zaritsky; Yuan-Sen 源森 Ting 丁; Ana Bonaca; Rohan P. Naidu; Benjamin D. Johnson; Phillip A. Cargile; Nelson Caldwell; Josh Speagle et al.
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Discovery of Magellanic Stellar Debris in the H3 Survey

The Astrophysical Journal Letters
2020-12-01 | Journal article
DOI: 10.3847/2041-8213/abcb83
Contributors: Dennis Zaritsky; Charlie Conroy; Rohan P. Naidu; Phillip A. Cargile; Mary Putman; Gurtina Besla; Ana Bonaca; Nelson Caldwell; Jiwon Jesse Han; Benjamin D. Johnson et al.
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Evidence from the H3 Survey That the Stellar Halo Is Entirely Comprised of Substructure

The Astrophysical Journal
2020-09-01 | Journal article
DOI: 10.3847/1538-4357/abaef4
Contributors: Rohan P. Naidu; Charlie Conroy; Ana Bonaca; Benjamin D. Johnson; Yuan-Sen 源森 Ting 丁; Nelson Caldwell; Dennis Zaritsky; Phillip A. Cargile
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A Gaia-based Catalog of Candidate Stripped Nuclei and Luminous Globular Clusters in the Halo of Centaurus A

The Astrophysical Journal
2020-08-01 | Journal article
DOI: 10.3847/1538-4357/ab6f69
Contributors: Karina T. Voggel; Anil C. Seth; David J. Sand; Allison Hughes; Jay Strader; Denija Crnojevic; Nelson Caldwell
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Timing the Early Assembly of the Milky Way with the H3 Survey

The Astrophysical Journal Letters
2020-07-01 | Journal article
DOI: 10.3847/2041-8213/ab9caa
Contributors: Ana Bonaca; Charlie Conroy; Phillip A. Cargile; Rohan P. Naidu; Benjamin D. Johnson; Dennis Zaritsky; Yuan-Sen Ting; Nelson Caldwell; Jiwon Jesse Han; Pieter van Dokkum
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A Larger Extent for the Ophiuchus Stream

The Astronomical Journal
2020-06-01 | Journal article
DOI: 10.3847/1538-3881/ab8cbf
Contributors: Nelson Caldwell; Ana Bonaca; Adrian M. Price-Whelan; Branimir Sesar; Matthew G. Walker
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High-resolution Spectroscopy of the GD-1 Stellar Stream Localizes the Perturber near the Orbital Plane of Sagittarius

The Astrophysical Journal Letters
2020-04-01 | Journal article
DOI: 10.3847/2041-8213/ab800c
Contributors: Ana Bonaca; Charlie Conroy; David W. Hogg; Phillip A. Cargile; Nelson Caldwell; Rohan P. Naidu; Adrian M. Price-Whelan; Joshua S. Speagle; Benjamin D. Johnson
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A Lower Limit on the Mass of Our Galaxy from the H3 Survey

The Astrophysical Journal
2020-01-10 | Journal article
DOI: 10.3847/1538-4357/ab5b93
Contributors: Dennis Zaritsky; Charlie Conroy; Huanian Zhang; Rohan P. Naidu; Ana Bonaca; Nelson Caldwell; Phillip A. Cargile; Benjamin D. Johnson
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Rapid Postshock Cooling and Pressure-driven Shell-phase Evolution of the Galactic Halo SNR G70.0–21.5

The Astrophysical Journal
2020-01-10 | Journal article
DOI: 10.3847/1538-4357/ab5e84
Contributors: J. C. Raymond; N. Caldwell; R. A. Fesen; K. E. Weil; P. Boumis; D. di Cicco; D. Mittelman; S. Walker
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Resolving the Metallicity Distribution of the Stellar Halo with the H3 Survey

The Astrophysical Journal
2019-12-20 | Journal article
DOI: 10.3847/1538-4357/ab5710
Contributors: Charlie Conroy; Rohan P. Naidu; Dennis Zaritsky; Ana Bonaca; Phillip Cargile; Benjamin D. Johnson; Nelson Caldwell
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Signatures of Tidal Disruption in Ultra-faint Dwarf Galaxies: A Combined HST, Gaia, and MMT/Hectochelle Study of Leo V

The Astrophysical Journal
2019-11-01 | Journal article
DOI: 10.3847/1538-4357/ab45ec
Contributors: Burçin Mutlu-Pakdil; David J. Sand; Matthew G. Walker; Nelson Caldwell; Jeffrey L. Carlin; Michelle L. Collins; Denija Crnojević; Mario Mateo; Edward W. Olszewski; Anil C. Seth et al.
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Mapping the Stellar Halo with the H3 Spectroscopic Survey

The Astrophysical Journal
2019-09-20 | Journal article
DOI: 10.3847/1538-4357/ab38b8
Contributors: Charlie Conroy; Ana Bonaca; Phillip Cargile; Benjamin D. Johnson; Nelson Caldwell; Rohan P. Naidu; Dennis Zaritsky; Daniel Fabricant; Sean Moran; Jaehyon Rhee et al.
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The Faint End of the Centaurus A Satellite Luminosity Function

The Astrophysical Journal
2019-02-10 | Journal article
DOI: 10.3847/1538-4357/aafbe7
Contributors: D. Crnojević; D. J. Sand; P. Bennet; S. Pasetto; K. Spekkens; N. Caldwell; P. Guhathakurta; B. McLeod; A. Seth; J. D. Simon et al.
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A Deeper Look at the New Milky Way Satellites: Sagittarius II, Reticulum II, Phoenix II, and Tucana III∗

The Astrophysical Journal
2018-08-10 | Journal article
DOI: 10.3847/1538-4357/aacd0e
Contributors: Burçin Mutlu-Pakdil; David J. Sand; Jeffrey L. Carlin; Kristine Spekkens; Nelson Caldwell; Denija Crnojević; Allison K. Hughes; Beth Willman; Dennis Zaritsky
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Exploring the Chemical Composition and Double Horizontal Branch of the Bulge Globular Cluster NGC 6569

The Astronomical Journal
2018-02-01 | Journal article
DOI: 10.3847/1538-3881/aaa294
Contributors: Christian I. Johnson; R. Michael Rich; Nelson Caldwell; Mario Mateo; John I. Bailey, III; Edward W. Olszewski; Matthew G. Walker
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Light and Heavy Element Abundance Variations in the Outer Halo Globular Cluster NGC 6229

The Astronomical Journal
2017-10-01 | Journal article
DOI: 10.3847/1538-3881/aa86ac
Contributors: Christian I. Johnson; Nelson Caldwell; R. Michael Rich; Matthew G. Walker
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Hubble Space Telescope  Imaging of the Ultra-compact High Velocity Cloud AGC 226067: A Stripped Remnant in the Virgo Cluster

The Astrophysical Journal
2017-07-10 | Journal article
DOI: 10.3847/1538-4357/aa7557
Contributors: D. J. Sand; A. C. Seth; D. Crnojević; K. Spekkens; J. Strader; E. A. K. Adams; N. Caldwell; P. Guhathakurta; J. Kenney; S. Randall et al.
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Chemical Complexity in the Eu-enhanced Monometallic Globular NGC 5986∗

The Astrophysical Journal
2017-06-10 | Journal article
DOI: 10.3847/1538-4357/aa7414
Contributors: Christian I. Johnson; Nelson Caldwell; R. Michael Rich; Mario Mateo; John I. Bailey III; Edward W. Olszewski; Matthew G. Walker
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Erratum: Crater 2: An Extremely Cold Dark Matter Halo (2017, ApJ, 839, 20)

The Astrophysical Journal
2017-05-20 | Journal article
DOI: 10.3847/1538-4357/aa7208
Contributors: Nelson Caldwell; Matthew G. Walker; Mario Mateo; Edward W. Olszewski; Sergey Koposov; Vasily Belokurov; Gabriel Torrealba; Alex Geringer-Sameth; Christian I. Johnson
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Crater 2: An Extremely Cold Dark Matter Halo

The Astrophysical Journal
2017-04-10 | Journal article
DOI: 10.3847/1538-4357/aa688e
Contributors: Nelson Caldwell; Matthew G. Walker; Mario Mateo; Edward W. Olszewski; Sergey Koposov; Vasily Belokurov; Gabriel Torrealba; Alex Geringer-Sameth; Christian I. Johnson
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A Chemical Composition Survey of the Iron-complex Globular Cluster NGC 6273 (M19)*

The Astrophysical Journal
2017-02-20 | Journal article
DOI: 10.3847/1538-4357/836/2/168
Contributors: Christian I. Johnson; Nelson Caldwell; R. Michael Rich; Mario Mateo; John I. Bailey, III; William I. Clarkson; Edward W. Olszewski; Matthew G. Walker
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Improved Dynamical Constraints on the Mass of the Central Black Hole in NGC 404

The Astrophysical Journal
2017-02-20 | Journal article
DOI: 10.3847/1538-4357/aa5cb4
Contributors: Dieu D. Nguyen; Anil C. Seth; Mark den Brok; Nadine Neumayer; Michele Cappellari; Aaron J. Barth; Nelson Caldwell; Benjamin F. Williams; Breanna Binder
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INFRARED HIGH-RESOLUTION INTEGRATED LIGHT SPECTRAL ANALYSES OF M31 GLOBULAR CLUSTERS FROM APOGEE

The Astrophysical Journal
2016-10-01 | Journal article
DOI: 10.3847/0004-637X/829/2/116
Contributors: Charli M. Sakari; Matthew D. Shetrone; Ricardo P. Schiavon; Dmitry Bizyaev; Carlos Allende Prieto; Timothy C. Beers; Nelson Caldwell; Domingo Aníbal García-Hernández; Sara Lucatello; Steven Majewski et al.
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THE CHEMICAL COMPOSITION OF RED GIANT BRANCH STARS IN THE GALACTIC GLOBULAR CLUSTERS NGC 6342 AND NGC 6366

The Astronomical Journal
2016-07-01 | Journal article
DOI: 10.3847/0004-6256/152/1/21
Contributors: Christian I. Johnson; Nelson Caldwell; R. Michael Rich; Catherine A. Pilachowski; Tiffany Hsyu
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STAR CLUSTERS IN M31. VII. GLOBAL KINEMATICS AND METALLICITY SUBPOPULATIONS OF THE GLOBULAR CLUSTERS

The Astrophysical Journal
2016-06-10 | Journal article
DOI: 10.3847/0004-637X/824/1/42
Contributors: Nelson Caldwell; Aaron J. Romanowsky
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THE EXTENDED HALO OF CENTAURUS A: UNCOVERING SATELLITES, STREAMS, AND SUBSTRUCTURES*

The Astrophysical Journal
2016-05-20 | Journal article
DOI: 10.3847/0004-637X/823/1/19
Contributors: D. Crnojević; D. J. Sand; K. Spekkens; N. Caldwell; P. Guhathakurta; B. McLeod; A. Seth; J. D. Simon; J. Strader; E. Toloba
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EVIDENCE THAT HYDRA I IS A TIDALLY DISRUPTING MILKY WAY DWARF GALAXY

The Astrophysical Journal
2016-02-10 | Journal article
DOI: 10.3847/0004-637X/818/1/39
Contributors: Jonathan R. Hargis; Brian Kimmig; Beth Willman; Nelson Caldwell; Matthew G. Walker; Jay Strader; David J. Sand; Carl J. Grillmair; Joo Heon Yoon
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A TIDALLY DISRUPTING DWARF GALAXY IN THE HALO OF NGC 253

The Astrophysical Journal Letters
2016-01-01 | Journal article
DOI: 10.3847/2041-8205/816/1/L5
Contributors: Elisa Toloba; David J. Sand; Kristine Spekkens; Denija Crnojević; Joshua D. Simon; Puragra Guhathakurta; Jay Strader; Nelson Caldwell; Brian McLeod; Anil C. Seth
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A SPECTROSCOPIC ANALYSIS OF THE GALACTIC GLOBULAR CLUSTER NGC 6273 (M19)

The Astronomical Journal
2015-07-30 | Journal article
DOI: 10.1088/0004-6256/150/2/63
Contributors: Christian I. Johnson; R. Michael Rich; Catherine A. Pilachowski; Nelson Caldwell; Mario Mateo; John I. Bailey, III; Jeffrey D. Crane
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A COMPREHENSIVE ARCHIVAL SEARCH FOR COUNTERPARTS TO ULTRA-COMPACT HIGH-VELOCITY CLOUDS: FIVE LOCAL VOLUME DWARF GALAXIES

The Astrophysical Journal
2015-06-10 | Journal article
DOI: 10.1088/0004-637X/806/1/95
Contributors: D. J. Sand; D. Crnojević; P. Bennet; B. Willman; J. Hargis; J. Strader; E. Olszewski; E. J. Tollerud; J. D. Simon; N. Caldwell et al.
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