Articles by Christian I. Johnson

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Christian I. Johnson

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RR Lyrae Stars Belonging to the Candidate Globular Cluster Patchick 99

26 January 2024 by Evan Butler and others at

University of Washington

Solar and Stellar Astrophysics, Astrophysics of Galaxies

The Milky Way Bulge extra-tidal star survey: BH 261 (AL 3)

28 October 2023 by Andrea Kunder and others at

ASTRON

Astrophysics of Galaxies, Solar and Stellar Astrophysics

To Grow Old and Peculiar: A Survey of Anomalous Variable Stars in M80 and Age Determination using K2 and Gaia

11 August 2023 by László Molnár and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

A Wide View of the Galactic Globular Cluster NGC 2808: Red Giant and Horizontal Branch Star Spatial Distributions

10 May 2023 by Christian Johnson and others

Astrophysics of Galaxies, Solar and Stellar Astrophysics

Metal Mixing in the R-Process Enhanced Ultra-Faint Dwarf Galaxy Reticulum II

23 February 2023 by Alexander Ji and others

Astrophysics of Galaxies

The Ages of Galactic Bulge Stars with Realistic Uncertainties

18 February 2023 by Meridith Joyce and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Blanco DECam Bulge Survey (BDBS) IV: Metallicity Distributions and Bulge Structure from 2.6 Million Red Clump Stars

29 June 2022 by Christian Johnson and others

Astrophysics of Galaxies, Solar and Stellar Astrophysics

Blanco DECam Bulge Survey (BDBS) V. Cleaning the foreground populations from Galactic bulge colour-magnitude diagrams using Gaia EDR3

26 June 2022 by Tommaso Marchetti and others

Astrophysics of Galaxies

HST observations of the globular cluster NGC 6402 (M14) and its peculiar multiple populations

7 January 2022 by Francesca D'Antona and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Blanco DECam Bulge Survey (BDBS) III: A new view of the double red clump in the Milky Way bulge through luminosity and color distribution

15 January 2021 by Dongwook Lim and others

Astrophysics of Galaxies

Difference in chemical composition between the bright and faint red clump stars in the Milky Way bulge

7 December 2020 by Dongwook Lim and others

Astrophysics of Galaxies

The Blanco DECam Bulge Survey. I. The Survey Description and Early Results

10 September 2020 by R. Michael Rich and others

Astrophysics of Galaxies

Blanco DECam Bulge Survey (BDBS) II: Project Performance, Data Analysis, and Early Science Results

21 August 2020 by Christian Johnson and others

Astrophysics of Galaxies

The Bulge Radial Velocity Assay for RR Lyrae stars (BRAVA-RR) DR2: a Bimodal Bulge?

23 April 2020 by Andrea Kunder and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

The Most Metal-poor Stars in Omega Centauri (NGC 5139)

20 April 2020 by Christian Johnson and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Spectroscopy of LMC Cluster Stars

28 October 2019 by Andrea Dupree and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

The Globular Cluster Origin of the Milky Way Outer Bulge: Evidence from Sodium Bimodality

21 May 2019 by Young-Wook Lee and others

Astrophysics of Galaxies

Are the double-mode bulge RR Lyrae stars with identical period-ratios the relic of a disrupted stellar system?

8 May 2019 by Andrea Kunder and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Light Element Discontinuities Suggest an Early Termination of Star Formation in the Globular Cluster NGC 6402 (M14)

5 March 2019 by Christian Johnson and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

LSST Cadence Optimization White Paper: The Definitive Map of the Galactic bulge

20 December 2018 by Oscar Gonzalez and others at

UC Los Angeles

Astrophysics of Galaxies

Radial velocities of RR Lyrae stars in and around NGC 6441

26 February 2018 by Andrea Kunder and others

Astrophysics of Galaxies, Solar and Stellar Astrophysics

Exploring the Chemical Composition and Double Horizontal Branch of the Bulge Globular Cluster NGC 6569

31 January 2018 by Christian Johnson and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Light and Heavy Element Abundance Variations in the Outer Halo Globular Cluster NGC 6229

31 August 2017 by Christian Johnson and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Chemical Complexity in the Eu-enhanced Monometallic Globular Cluster NGC 5986

30 May 2017 by Christian Johnson and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Crater 2: An Extremely Cold Dark Matter Halo

19 December 2016 by Nelson Caldwell and others

Astrophysics of Galaxies

A Chemical Composition Survey of the Iron-Complex Globular Cluster NGC 6273 (M 19)

17 November 2016 by Christian Johnson and others

Solar and Stellar Astrophysics

The Chemical Composition of Red Giant Branch Stars in the Galactic Globular Clusters NGC 6342 and NGC 6366

27 June 2016 by Christian Johnson and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Evidence for a chemical enrichment coupling of globular clusters and field stars in the Fornax dSph

13 October 2015 by Benjamin Hendricks and others

Astrophysics of Galaxies, Solar and Stellar Astrophysics

A Spectroscopic Analysis of the Galactic Globular Cluster NGC 6273 (M19)

2 July 2015 by Christian Johnson and others

Solar and Stellar Astrophysics

A high-velocity bulge RR Lyrae variable on a halo-like orbit

8 June 2015 by Andrea Kunder and others

Solar and Stellar Astrophysics

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Astrophysics of Galaxies Solar and Stellar Astrophysics