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Damping of Oscillations in Red Giants by Resonant Mode Coupling
Nevin N. Weinberg, Phil Arras, Debaditya Pramanik
Asteroseismic studies of red giants generally assume that the oscillation modes can be treated as linear perturbations to the background star. However, observations by the Kepler m…
Geometry of the Draco C1 Symbiotic Binary
Hannah M. Lewis, Borja Anguiano, Keivan G. Stassun +14
Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion -- likely a white dwarf -- belonging to the Draco dwarf spheroidal gala…
The full phase curve of the eclipsing hot white dwarf binary system KOI-964
Ian Wong, Avi Shporer, Juliette C. Becker +6
We analyze the full phase curve of KOI-964, a binary system consisting of a hot white dwarf on an eclipsing orbit around an A-type host star. Using all 18 quarter…
Orbital Decay in Binaries Containing Post-Main Sequence Stars
Meng Sun, Phil Arras, Nevin N. Weinberg +2
The orbital decay of binaries containing a primary sub-giant or red giant star and a stellar or substellar companion is investigated. The tide raised in the primary by the companio…
Nonlinear Mixed Modes in Red Giants
Nevin N. Weinberg, Phil Arras
Turbulent motions in the convective envelope of red giants excite a rich spectrum of solar-like oscillation modes. Observations by CoRoT and Kepler have shown that the mode amplitu…
Using long-term millisecond pulsar timing to obtain physical characteristics of the bulge globular cluster Terzan 5
Brian Prager, Scott Ransom, Paulo Freire +4
Over the past decade the discovery of three unique stellar populations and a large number of confirmed pulsars within the globular cluster Terzan 5 has raised questions over its cl…