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Computing Fast and Reliable Gravitational Waveforms of Binary Neutron Star Merger Remnants
Paul J. Easter, Paul D. Lasky, Andrew R. Casey +2
Gravitational waves have been detected from the inspiral of a binary neutron-star, GW170817, which allowed constraints to be placed on the neutron star equation of state. The equat…
An Ultra Metal-poor Star Near the Hydrogen-burning Limit
Kevin C. Schlaufman, Ian B. Thompson, Andrew R. Casey
It is unknown whether or not low-mass stars can form at low metallicity. While theoretical simulations of Population III (Pop III) star formation show that protostellar disks can f…
The GALAH survey and Gaia DR2: dissecting the stellar disc's phase space by age, action, chemistry and location
Joss Bland-Hawthorn, Sanjib Sharma, Thor Tepper-Garcia +24
We use the second data releases of the ESA Gaia astrometric survey and the high-resolution GALAH spectroscopic survey to analyse the structure of our Galaxy's disc components. With…
Thermohaline mixing in extremely metal-poor stars
Kate Henkel, Amanda I. Karakas, Andrew R. Casey +2
Extremely metal-poor (EMP) stars are an integral piece in the puzzle that is the early Universe, and although anomolous subclasses of EMP stars such as carbon-enhanced metal-poor (…
APOGEE Data Releases 13 and 14: Data and Analysis
Jon A. Holtzman, Sten Hasselquist, Matthew Shetrone +23
Data and analysis methodology used for the SDSS/APOGEE Data Releases 13 and 14 are described, highlighting differences from the DR12 analysis presented in Holtzman (2015). Some imp…
On the discovery of K-enhanced and possibly Mg-depleted stars throughout the Milky Way
Alex J. Kemp, Andrew R. Casey, Matthew T. Miles +8
Stars with unusual elemental abundances offer clues about rare astrophysical events or nucleosynthetic pathways. Stars with significantly depleted magnesium and enhanced potassium…