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A Microphotonic Astrocomb
E. Obrzud, M. Rainer, A. Harutyunyan +13
One of the essential prerequisites for detection of Earth-like extra-solar planets or direct measurements of the cosmological expansion is the accurate and precise wavelength calib…
Direct imaging of an ultracool substellar companion to the exoplanet host star HD 4113A
A. Cheetham, D. Ségransan, S. Peretti +7
Using high-contrast imaging with the SPHERE instrument at the VLT, we report the first images of a cold brown dwarf companion to the exoplanet host star HD4113A. The brown dwarf HD…
Few-mode fibers and AO-assisted high resolution spectroscopy: coupling efficiency and modal noise mitigation
N. Blind, U. Conod, F. Wildi
NIRPS (Near Infra-Red Planet Searcher) is an AO-assisted and fiber-fed spectrograph for high precision radial velocity measurements that will operate in the YJH-bands. While using…
Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
C. Lazzoni, S. Desidera, F. Marzari +66
A large number of systems harboring a debris disk show evidence for a double belt architecture. One hypothesis for explaining the gap between the belts is the presence of one or mo…
The HIP 79977 debris disk in polarized light
N. Engler, H. M. Schmid, Ch. Thalmann +40
We present observations of the known edge-on debris disk around HIP 79977 (HD 146897, F star in Upper Sco, 123 pc), taken with the ZIMPOL differential polarimeter of the SPHERE ins…
Investigation of the inner structures around HD169142 with VLT/SPHERE
R. Ligi, A. Vigan, R. Gratton +47
We present observations of the Herbig Ae star HD169142 with VLT/SPHERE instruments InfraRed Dual-band Imager and Spectrograph (IRDIS) ( and bands) and the Integral Fie…