Practical Galaxy Morphology Tools from Deep Supervised Representation Learning

1 code implementation • 25 Oct 2021 • Mike Walmsley, Anna M. M. Scaife, Chris Lintott, Michelle Lochner, Verlon Etsebeth, Tobias Géron, Hugh Dickinson, Lucy Fortson, Sandor Kruk, Karen L. Masters, Kameswara Bharadwaj Mantha, Brooke D. Simmons

Models fine-tuned from our representation are better able to identify ring galaxies than models fine-tuned from terrestrial images (ImageNet) or trained from scratch.

Anomaly Detection Astronomy +2

Galaxy Zoo DECaLS: Detailed Visual Morphology Measurements from Volunteers and Deep Learning for 314,000 Galaxies

1 code implementation • 16 Feb 2021 • Mike Walmsley, Chris Lintott, Tobias Geron, Sandor Kruk, Coleman Krawczyk, Kyle W. Willett, Steven Bamford, Lee S. Kelvin, Lucy Fortson, Yarin Gal, William Keel, Karen L. Masters, Vihang Mehta, Brooke D. Simmons, Rebecca Smethurst, Lewis Smith, Elisabeth M. Baeten, Christine Macmillan

All classifications are used to train an ensemble of Bayesian convolutional neural networks (a state-of-the-art deep learning method) to predict posteriors for the detailed morphology of all 314, 000 galaxies.

HI-MaNGA: Tracing the physics of the neutral and ionized ISM with the second data release

no code implementations • 29 Jan 2021 • David V. Stark, Karen L. Masters, Vladimir Avila-Reese, Rogemar Riffel, Rogerio Riffel, Nicholas Fraser Boardman, Zheng Zheng, Anne-Marie Weijmans, Sean Dillon, Catherine Fielder, Daniel Finnegan, Patricia Fofie, Julian Goddy, Emily Harrington, Zachary Pace, Wiphu Rujopakarn, Nattida Samanso, Shoaib Shamsi, Anubhav Sharma, Elizabeth Warrick, Catherine Witherspoon, Nathan Wolthuis

We present the second data release for the HI-MaNGA programme of HI follow-up observations for the SDSS-IV MaNGA survey.

Astrophysics of Galaxies

SDSS-IV/MaNGA: Can impulsive gaseous inflows explain steep oxygen abundance profiles \& anomalously-low-metallicity regions?

no code implementations • 23 Dec 2020 • Zachary J. Pace, Christy Tremonti, Adam L. Schaefer, David V. Stark, Catherine A. Witherspoon, Karen L. Masters, Niv Drory, Kai Zhang

We reveal a mutual correlation between steep oxygen abundance profiles between $0. 25-1. 5 R_e$, increased variability of metallicity between $1. 25-1. 75 R_e$, and elevated HI content at fixed total galaxy stellar mass.

Astrophysics of Galaxies