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White Dwarf Variability with gPhoton: Pulsators
Michael A. Tucker, Scott W. Fleming, Ingrid Pelisoli +10
We present results from a search for short time-scale white dwarf variability using \texttt{gPhoton}, a time-tagged database of \textit{GALEX} photon events and associated software…
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. III. Optical and UV Spectra of a Blue Kilonova From Fast Polar Ejecta
M. Nicholl, E. Berger, D. Kasen +31
We present optical and ultraviolet spectra of the first electromagnetic counterpart to a gravitational wave (GW) source, the binary neutron star merger GW170817. Spectra were obtai…
Are sdAs helium core stars?
Ingrid Pelisoli, S. O. Kepler, D. Koester
Evolved stars with a helium core can be formed by non-conservative mass exchange interaction with a companion or by strong mass loss. Their masses are smaller than 0.5 MSun. In the…
White Dwarf Stars
S. O. Kepler, Alejandra Daniela Romero, Ingrid Pelisoli +1
White dwarf stars are the final stage of most stars, born single or in multiple systems. We discuss the identification, magnetic fields, and mass distribution for white dwarfs dete…