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37 papers · 2 filters
Sulphur monoxide exposes a potential molecular disk wind from the planet-hosting disk around HD100546
Alice Booth, Catherine Walsh, Mihkel Kama +3
Sulphur-bearing volatiles are observed to be significantly depleted in interstellar and circumstellar regions. This missing sulphur is postulated to be mostly locked up in refracto…
Efficiency of radial transport of ices in protoplanetary disks probed with infrared observations: the case of CO
Arthur D. Bosman, Alexander G. G. M. Tielens, Ewine F. van Dishoeck
The efficiency of radial transport of icy solid material from outer disk to the inner disk is currently unconstrained. Efficient radial transport of icy dust grains could significa…
The occurrence of planets and other substellar bodies around white dwarfs using K2
Lennart van Sluijs, Vincent Van Eylen
The majority of stars both host planetary systems and evolve into a white dwarf (WD). To understand their post-main-sequence (PMS) planetary system evolution, we present a search f…
Searching for reflected light from Bootis b with high-resolution ground-based spectroscopy: Approaching the contrast barrier
H. J. Hoeijmakers, I. A. G. Snellen, S. E. van Terwisga
It is challenging to measure the starlight reflected from exoplanets because of the extreme contrast with their host stars. For hot Jupiters, this contrast is in the range of $10^{…
A better characterization of the chemical composition of exoplanets atmospheres with ARIEL
Olivia Venot, Benjamin Drummond, Yamila Miguel +3
Since the discovery of the first extrasolar planet more than twenty years ago, we have discovered nearly four thousand planets orbiting stars other than the Sun. Current observatio…
The origin of interstellar asteroidal objects like 1I/2017 U1 'Oumuamua
Simon Portegies Zwart, Santiago Torres, Inti Pelupessy +2
We study the origin of the interstellar object 1I/2017 U1 'Oumuamua by juxtaposing estimates based on the observations with simulations. We speculate that objects like 'Oumuamua ar…