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Astro2020 APC White Paper: Theoretical Astrophysics 2020-2030
Juna A. Kollmeier, Lauren Anderson, Andrew Benson +20
The past two decades have seen a tremendous investment in observational facilities that promise to reveal new and unprecedented discoveries about the universe. In comparison, the i…
The Impact of Wind Scalings on Stellar Growth and the Baryon Cycle in Cosmological Simulations
Shuiyao Huang, Neal Katz, Romeel Davé +5
Many phenomenologically successful cosmological galaxy formation simulations employ kinetic winds to model galactic outflows, a crucial ingredient in obtaining predictions that agr…
Variable H Emission in the Nebular Spectra of the Low-Luminosity Type Ia SN2018cqj/ATLAS18qtd
Jose L. Prieto, Ping Chen, Subo Dong +6
We present optical photometry and spectroscopy of the Type Ia supernova SN2018cqj/ATLAS18qtd. The supernova exploded in an isolated region at ~kpc from the S0 galaxy IC~55…
Astro2020 APC White Paper: The MegaMapper: a z > 2 spectroscopic instrument for the study of Inflation and Dark Energy
David J. Schlegel, Juna A. Kollmeier, Greg Aldering +74
MegaMapper is a proposed ground-based experiment to measure Inflation parameters and Dark Energy from galaxy redshifts at 2<z<5. A 6.5-m Magellan telescope will be coupled with DES…
In Pursuit of Galactic Archaeology: Astro2020 Science White Paper
Melissa Ness, Jonathan Bird, Jennifer Johnson +30
The next decade affords tremendous opportunity to achieve the goals of Galactic archaeology. That is, to reconstruct the evolutionary narrative of the Milky Way, based on the empir…
The Origin of Elements Across Cosmic Time: Astro2020 Science White Paper
Jennifer A. Johnson, Gail Zasowski, David Weinberg +14
The problem of the origin of the elements is a fundamental one in astronomy and one that has many open questions. Prominent examples include (1) the nature of Type Ia supernovae an…