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An Optical Transmission Spectrum for the Ultra-hot Jupiter WASP-121b Measured with the Hubble Space Telescope
Nikolov, Nikolay; Drummond, Benjamin; Sing, David K. +24 more
We present an atmospheric transmission spectrum for the ultra-hot Jupiter WASP-121b, measured using the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. Across the 0.47-1 µ {{m}} wavelength range, the data imply an atmospheric opacity comparable to—and in some spectroscopic channels exceeding—that previously measured…
Optical Dimming of RW Aur Associated with an Iron-rich Corona and Exceptionally High Absorbing Column Density
Schneider, P. C.; Birnstiel, T.; Principe, D. A. +7 more
RW Aur is a binary system composed of two young, low-mass stars. The primary, RW Aur A, has undergone visual dimming events (ΔV = 2-3 mag) in 2011, 2014-16, and 2017-2018. Visual and IR observations indicate a gray absorber that moved into the line of sight. This dimming is also associated with changes in the outflow. In 2017, when the optical bri…
Is the Young Star RZ Piscium Consuming Its Own (Planetary) Offspring?
Kastner, J. H.; Punzi, K. M.; Melis, C. +4 more
The erratically variable star RZ Piscium (RZ Psc) displays extreme optical dropout events and strikingly large excess infrared emission. To ascertain the evolutionary status of this intriguing star, we obtained observations of RZ Psc with the European Space Agency’s X-ray Multi-Mirror Mission (XMM-Newton), as well as high-resolution optical spectr…