1 code implementation • 10 Mar 2021 • Damien de Mijolla, Melissa Ness, Serena Viti, Adam Wheeler
To remove known non-chemical factors of variation, we develop and implement a neural network architecture that learns a disentangled spectral representation.
no code implementations • 8 Sep 2020 • Madeline Lucey, Keith Hawkins, Melissa Ness, Victor P. Debattista, Alice Luna, Martin Asplund, Thomas Bensby, Luca Casagrande, Sofia Feltzing, Kenneth C. Freeman, Chiaki Kobayashi, Anna F. Marino
Currently, it is unclear if the metal-poor stars in the bulge ([Fe/H] < -1 dex) are merely halo interlopers, a unique accreted population, part of the boxy/peanut-shaped (B/P) bulge or a classical bulge population.
Astrophysics of Galaxies
no code implementations • 8 Sep 2020 • Adam Wheeler, Melissa Ness, David W. Hogg
Stars with peculiar element abundances are important markers of chemical enrichment mechanisms.
Solar and Stellar Astrophysics
1 code implementation • 19 May 2020 • Kirsten Blancato, Melissa Ness, Daniel Huber, Yuxi Lu, Ruth Angus
Stellar variability is driven by a multitude of internal physical processes that depend on fundamental stellar properties.
Solar and Stellar Astrophysics
1 code implementation • 16 Jul 2018 • Angus Beane, Melissa Ness, Megan Bedell
We find weak gradients in all actions with stellar age, of (7. 51 +/- 0. 52, -29. 0 +/- 1. 83, 1. 54 +/- 0. 18) kpc km/s/Gyr for J_r, L_z, and J_z, respectively.
Solar and Stellar Astrophysics Astrophysics of Galaxies
no code implementations • 29 Jan 2015 • Melissa Ness, David W. Hogg, Hans-Walter Rix, Anna Y. Q. Ho, Gail Zasowski
New spectroscopic surveys offer the promise of consistent stellar parameters and abundances ('stellar labels') for hundreds of thousands of stars in the Milky Way: this poses a formidable spectral modeling challenge.
Solar and Stellar Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics