5 papers
HST Observations of HD 166620 and Tau Ceti: First UV Spectra of a Magnetic Grand Minimum Star and the Extent of Tau Ceti's Astrosphere
Brian E. Wood, Hans-Reinhard Mueller, Dean Hartshorn +2
We present new Hubble Space Telescope (HST) UV spectra of the K2 V star HD 166620, the first star clearly recognized to be in a "magnetic grand minimum" state analogous to the Sun'…
Far-ultraviolet flares and variability of the young M dwarf AU Mic: a non-detection of planet c in transit at Lyman-alpha
Keighley E. Rockcliffe, Elisabeth R. Newton, Allison Youngblood +8
Atmospheric escape's potential to shape the exoplanet population motivates detailed observations of systems actively undergoing escape. AU Mic is a young and active M dwarf hosting…
Interstellar Neutral Hydrogen in the Heliosphere: New Horizons Observations in the Context of Models
P. Swaczyna, M. Bzowski, K. Dialynas +12
Interstellar neutral (ISN) hydrogen is the most abundant species in the outer heliosheath and the very local interstellar medium (VLISM). Charge exchange collisions in the outer he…
Effects of an Explicit Time-Dependent Radiation Pressure Force on Trajectories of Primary Neutral Hydrogen in the Heliosphere
Lucas Dyke, Hans-Reinhard Müller
Radiation pressure exerted by solar photon output is salient to the motion of primary neutral hydrogen atoms streaming into the inner heliosphere directly from the Local Interstell…
Resolving Red Giant Winds with the Hubble Space Telescope
Brian E. Wood, Graham M. Harper, Hans-Reinhard Mueller
We describe recent spectroscopic observations of red giant stars made by the Space Telescope Imaging Spectrograph (STIS) instrument on board the Hubble Space Telescope, which have…