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Dust trapping around Lagrangian points in protoplanetary disks
(European Southern Observatory, 2020)
Aims. Trojans are defined as objects that share the orbit of a planet at the stable Lagrangian points L4 and L5. In the Solar System, these bodies show a broad size distribution ranging from micrometer (μm) to centimeter ...
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 ...
NaCo polarimetric observations of Sz 91 transitional disc: a remarkable case of dust filtering
(Royal Astronomical Society, 2020)
We present polarized light observations of the transitional disc around Sz 91 acquired with VLT/NaCo at H (1.7μm) and Ks (2.2μm) bands. We resolve the disc and detect polarized emission up to ∼0.5 arcsec (∼80 au) along ...
Radiative Scale Height and Shadows in Protoplanetary Disks
(American Astronomical Society (Aas), 2021)
Planets form in young circumstellar disks called protoplanetary disks. However, it is still difficult to catch planet formation in situ. Nevertheless, from recent ALMA/SPHERE data, encouraging evidence of the direct and ...
Search for associations containing young stars (SACY) VIII. An updated census of spectroscopic binary systems exhibiting hints of non-universal multiplicity among their associations
(European Southern Observatory (ESO), 2021)
Context. Nearby young associations offer one of the best opportunities for a detailed study of the properties of young stellar and substellar objects thanks to their proximity (<200 pc) and age (∼5−150 Myr). Previous works ...
Highly Structured Inner Planetary System Debris around the Intermediate Age Sun-like Star TYC 8830 410 1
(American Astronomical Society, 2021)
We present a detailed characterization of the extremely dusty main-sequence star TYC 8830 410 1. This system hosts inner planetary system dust (Tdust ≈ 300 K) with a fractional infrared luminosity of ∼1%. Mid-infrared ...
A near-infrared interferometric survey of debris-disk stars VII. The hot-to-warm dust connection
(European Southern Observatory (ESO), 2021)
Context. Hot exozodiacal dust has been shown to be present in the innermost regions of an increasing number of main sequence stars over the past 15 yr. However, the origin of hot exozodiacal dust and its connection with ...
Characterizing the morphology of the debris disk around the low-mass star GSC 07396-00759
(European Southern Observatory (ESO), 2021)
Context. Debris disks have commonly been studied around intermediate-mass stars. Their intense radiation fields are believed to efficiently remove the small dust grains that are constantly replenished by collisions. For ...
Debris discs in binaries: morphology and photometric signatures?
(European Southern Observatory (ESO), 2021)
Context. Since about half of all main-sequence stars reside in multiple star systems, it is important to consider the effect of binarity on the evolution of planetesimal belts in these complex systems.
Aims. We aim to see ...
The HD 98800 quadruple pre-main sequence system Towards full orbital characterisation using long-baseline infrared interferometry
(European Southern Observatory (ESO), 2021)
Context. HD 98800 is a young (∼10 Myr old) and nearby (∼45 pc) quadruple system, composed of two spectroscopic binaries orbiting around each other (AaAb and BaBb), with a gas-rich disk in polar configuration around BaBb. ...