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SPECULATOR: Emulating stellar population synthesis for fast and accurate galaxy spectra and photometry
Justin Alsing, Hiranya Peiris, Joel Leja +6
We present SPECULATOR - a fast, accurate, and flexible framework for emulating stellar population synthesis (SPS) models for predicting galaxy spectra and photometry. For emulating…
A New Census of the 0.2 < z < 3.0 Universe, Part I: The Stellar Mass Function
Joel Leja, Joshua S. Speagle, Benjamin D. Johnson +3
There has been a long-standing factor-of-two tension between the observed star formation rate density and the observed stellar mass buildup after . Recently we have propose…
A Lower Limit on the Mass of Our Galaxy from the H3 Survey
Dennis Zaritsky, Charlie Conroy, Huanian Zhang +5
The timing argument provides a lower limit on the mass of the Milky Way. We find, using a sample of 32 stars at kpc drawn from the H3 Spectroscopic Survey and mock catalog…
Resolving the Metallicity Distribution of the Stellar Halo with the H3 Survey
Charlie Conroy, Rohan P. Naidu, Dennis Zaritsky +4
The Galactic stellar halo is predicted to have formed at least partially from the tidal disruption of accreted dwarf galaxies. This assembly history should be detectable in the orb…
Mapping the Stellar Halo with the H3 Spectroscopic Survey
Charlie Conroy, Ana Bonaca, Phillip Cargile +8
Modern theories of galaxy formation predict that the Galactic stellar halo was hierarchically assembled from the accretion and disruption of smaller systems. This hierarchical asse…
MINESweeper: Spectrophotometric Modeling of Stars in the Gaia Era
Phillip A. Cargile, Charlie Conroy, Benjamin D. Johnson +4
We present MINESweeper, a tool to measure stellar parameters by jointly fitting observed spectra and broadband photometry to model isochrones and spectral libraries. This approach…