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5 papers · 1 filter
Exocomet signatures around the A-shell star Leo?
C. Eiroa, I. Rebollido, B. Montesinos +18
We present an intensive monitoring of high-resolution spectra of the Ca {\sc ii} K line in the A7IV shell star Leo at very short (minutes, hours), short (night to night), and m…
Extremal storage functions and minimal realizations of discrete-time linear switching systems
Matthew Philippe, Ray Essick, Geir Dullerud +1
We study the induced gain of discrete-time linear switching systems with graph-constrained switching sequences. We first prove that, for stable systems in a minimal…
Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
Gaia Collaboration, A. G. A. Brown, A. Vallenari +5
At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magni…
The Gaia mission
Gaia Collaboration
Gaia is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original…
Multilayer modeling of the aureole photometry during the Venus transit: comparison between SDO/HMI and VEx/SOIR data
C. Pere, P. Tanga, Th. Widemann +4
The mesosphere of Venus is a critical range of altitudes in which complex temperature variability has been extensively studied by the space mission Venus Express (Vex) during its e…