TESS data show stochastic low-frequency variability dominates in most extreme helium stars, with characteristic timescales of 0.5-10 days correlating to stellar parameters and matching subsurface convection predictions.
E., et al., 2018b, @doi [ ] 10.1093/mnras/sty103, http://adsabs.harvard.edu/abs/2018MNRAS.475.5144S 475
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Type Ib supernovae are systematically bluer than Type Ic supernovae in optical colors, likely due to helium-rich versus helium-poor progenitors.
The paper delivers the first empirical masses and radii for the doubly-magnetic binary ε Lupi from combined photometry and radial velocities and classifies additional variability as g-mode pulsations of an SPB star.
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TESS Observations of Stochastic Low-frequency Variability in Extreme Helium Stars
TESS data show stochastic low-frequency variability dominates in most extreme helium stars, with characteristic timescales of 0.5-10 days correlating to stellar parameters and matching subsurface convection predictions.
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Type Ib Supernovae are bluer than Type Ic Supernovae
Type Ib supernovae are systematically bluer than Type Ic supernovae in optical colors, likely due to helium-rich versus helium-poor progenitors.
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$\varepsilon$ Lupi: measuring the heartbeat of a doubly-magnetic massive binary with BRITE-Constellation
The paper delivers the first empirical masses and radii for the doubly-magnetic binary ε Lupi from combined photometry and radial velocities and classifies additional variability as g-mode pulsations of an SPB star.