Articles by Wendy L. Freedman

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Wendy L. Freedman

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The Chicago-Carnegie Hubble Program: The JWST J-region Asymptotic Giant Branch (JAGB) Extragalactic Distance Scale

12 August 2024 by Abigail Lee and others at

University of Chicago

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Status Report on the Chicago-Carnegie Hubble Program (CCHP): Three Independent Astrophysical Determinations of the Hubble Constant Using the James Webb Space Telescope

12 August 2024 by Wendy Freedman and others at

University of Chicago

Cosmology and Nongalactic Astrophysics

Coordinated JWST Imaging of Three Distance Indicators in a SN Host Galaxy and an Estimate of the TRGB Color Dependence

10 July 2024 by Taylor Hoyt and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

1991T-like Supernovae

23 May 2024 by M. Phillips and others

High Energy Astrophysical Phenomena

Resolved Near-infrared Stellar Photometry from the Magellan Telescope for 13 Nearby Galaxies: JAGB Method Distances

29 February 2024 by Abigail Lee and others

Astrophysics of Galaxies

First JWST Observations of JAGB Stars in the SN Ia Host Galaxies: NGC 7250, NGC 4536, NGC 3972

4 December 2023 by Abigail Lee and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Astrophysical Distance Scale VII: A Self-Consistent, Multi-Wavelength Calibration of the Slopes and Relative Zero Points for the Run of Luminosity with Color of Stars Defining the Tip of the Red Giant Branch

8 November 2023 by Barry Madore and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Carnegie Supernova Project-I and -II: Measurements of H_0 using Cepheid, TRGB, and SBF Distance Calibration to Type Ia Supernovae

25 October 2023 by Syed Uddin and others

Cosmology and Nongalactic Astrophysics

Systematics in the Cepheid and TRGB Distance Scales: Metallicity Sensitivity of the Wesenheit Leavitt Law

19 September 2023 by Barry Madore and Wendy Freedman

Solar and Stellar Astrophysics

Progress in Direct Measurements of the Hubble Constant

17 September 2023 by Wendy Freedman and Barry Madore

Cosmology and Nongalactic Astrophysics

The Cepheid Extragalactic Distance Scale: Past, Present and Future

4 August 2023 by Wendy Freedman and Barry Madore

Cosmology and Nongalactic Astrophysics

Population II Distance Indicators: RR Lyrae Variables, Tip of the Red Giant Branch (TRGB) Stars and J-Branch Asymptotic Giant Branch (JAGB/Carbon) Stars

30 May 2023 by Barry Madore and Wendy Freedman

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Milky Way Zero-Point Calibration of the JAGB Method: Using Thermally Pulsing AGB Stars in Galactic Open Clusters

16 September 2022 by Barry Madore and others

Astrophysics of Galaxies

The Absolute Magnitudes of 1991T-like Supernovae

16 September 2022 by M. Phillips and others

High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics

A Uniform Type Ia Supernova Distance Ladder with the Zwicky Transient Facility: Absolute Calibration Based on the Tip of the Red Giant Branch (TRGB) Method

11 July 2022 by Suhail Dhawan and others

Cosmology and Nongalactic Astrophysics, High Energy Astrophysical Phenomena

The Astrophysical Distance Scale: V. A 2% Distance to the Local Group Spiral M33 via the JAGB Method, Tip of the Red Giant Branch, and Leavitt Law

23 June 2022 by Abigail Lee and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Distances to Local Group Galaxies via Population II, Stellar Distance Indicators I: The Sculptor Dwarf Spheroidal

17 May 2022 by Quang Tran and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Distances to Local Group Galaxies via Population II, Stellar Distance Indicators. II. The Fornax Dwarf Spheroidal

10 May 2022 by Elias Oakes and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

8 April 2022 by Elcio Abdalla and others

Cosmology and Nongalactic Astrophysics, High Energy Physics

Current Challenges in Cepheid Distance Calibrations Using Gaia EDR3

3 January 2022 by Kayla Owens and others

Astrophysics of Galaxies

Astrophysical Distance Scale IV. Preliminary Zero-Point Calibration of the JAGB Method in the HST/WFC3-IR Broad J-Band (F110W) Filter

13 December 2021 by Barry Madore and others

Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies

A Preliminary Calibration of the JAGB Method Using Gaia EDR3

9 October 2021 by Abigail Lee and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

The Stellar Initial Mass Function and Population Properties of M89 from Optical and NIR Spectroscopy: Addressing Biases in Spectral Index Analysis

6 July 2021 by Ilaria Lonoce and others

Astrophysics of Galaxies

Measurements of the Hubble Constant: Tensions in Perspective

29 June 2021 by Wendy Freedman

Cosmology and Nongalactic Astrophysics, High Energy Physics

The Carnegie Chicago Hubble Program X: Tip of the Red Giant Branch Distances to NGC 5643 and NGC 1404

12 February 2021 by Taylor Hoyt and others

Astrophysics of Galaxies

Multi-Wavelength, Optical (VI) and Near-Infrared (JHK) Calibration of the Tip of the Red Giant Branch Method based on Milky Way Globular Clusters

17 December 2020 by William Cerny and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

The Astrophysical Distance Scale III: Distance to the Local Group Galaxy WLM using Multi-Wavelength Observations of the Tip of the Red Giant Branch, Cepheids, and JAGB Stars

8 December 2020 by Abigail Lee and others

Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies

The Carnegie-Chicago Hubble Program. IX. Calibration of the Tip of the Red Giant Branch Method in the Mega-Maser Host Galaxy, NGC4258 (M106)

6 November 2020 by In Sung Jang and others

Astrophysics of Galaxies

Mathematical Underpinnings of the Multi-Wavelength Structure of the TRGB

13 September 2020 by Barry Madore and Wendy Freedman

Astrophysics of Galaxies, Solar and Stellar Astrophysics

Carnegie Supernova Project: Classification of Type Ia Supernovae

17 August 2020 by Anthony Burrow and others

High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics

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Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics High Energy Astrophysical Phenomena High Energy Physics Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology