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Resolving asymmetries along the pulsation cycle of the Mira star X Hydrae
(EDP Sciences, 2015)
Context. The mass-loss process in Mira stars probably occurs in an asymmetric way where dust can form in inhomogeneous circumstellar
molecular clumps. Following asymmetries along the pulsation cycle can give us clues about ...
Fast ray-tracing algorithm for circumstellar structures (FRACS) II. Disc parameters of the B[e] supergiant CPD-57 degrees 2874 from VLTI/MIDI data
(EDP SCIENCES S A, 2011)
Context. B[e] supergiants are luminous, massive post-main sequence stars exhibiting non-spherical winds, forbidden lines, and hot dust in a disc-like structure. The physical properties of their rich and complex circumstellar ...
The close circumstellar environment of Betelgeuse III. SPHERE/ZIMPOL imaging polarimetry in the visible
(EDP SCIENCES, 2016)
The physical mechanism through which the outgoing material of massive red supergiants is accelerated above the escape velocity is unclear. Thanks to the transparency of its circumstellar envelope, the nearby red supergiant ...
Deep Exploration of Eridani with Keck Ms-band Vortex Coronagraphy and Radial Velocities: Mass and Orbital Parameters of the Giant Exoplanet
(Institute of Physics Publishing, 2019)
We present the most sensitive direct imaging and radial velocity (RV) exploration of Eridani to date. Eridani is an adolescent planetary system, reminiscent of the early solar system. It is surrounded by a prominent and ...
The dust disk and companion of the nearby AGB star L-2 Puppis SPHERE/ZIMPOL polarimetric imaging at visible wavelengths
(ESO, 2015)
The bright southern star L-2 Pup is a particularly prominent asymptotic giant branch (AGB) star, located at a distance of only 64 pc. We report new adaptive optics observations of L2 Pup at visible wavelengths with the ...
Multiplicity of Galactic Cepheids from long-baseline interferometry - III. Sub-percent limits on the relative brightness of a close companion of delta Cephei
(2016)
We report new CHARA/Michigan InfraRed Combiner interferometric observations of the Cepheid archetype delta Cep, which aimed at detecting the newly discovered spectroscopic companion. We reached a maximum dynamic range Delta ...
The challenge of measuring the phase function of debris disks: Application to HR4796
(European Southern Observatory, 2020)
Context. Debris discs are valuable systems to study dust properties. Because they are optically thin at all wavelengths, we have direct access to the absorption and scattering properties of the dust grains. One very promising ...
Potential and sky coverage for off-axis fringe tracking in optical long baseline interferometry
(Oxford, 2021)
The spectacular results provided by the second-generationVLTI instruments GRAVITY and MATISSE on active galactic nuclei (AGN) trigger and justify a strong increase in the sensitivity limit of optical interferometers. A key ...
New disk discovered with VLT/SPHERE around the M star GSC 07396−00759
(EDP. Sciences S.A, 2018-05-25)
Debris disks are usually detected through the infrared excess over the photospheric level of their host star. The most favorable stars for disk detection are those with spectral types between A and K, while the statistics ...