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A SPHERE survey of self-shadowed planet-forming disks
A. Garufi, C. Dominik, C. Ginski +20
To date, nearly two hundred planet-forming disks have been imaged with high resolution. Our propensity to study bright and extended objects is however biasing our view of the disk…
An extended scattered light disk around AT Pyx -- Possible planet formation in a cometary globule
C. Ginski, R. Gratton, A. Bohn +35
To understand how the multitude of planetary systems that have been discovered come to be, we need to study systems at different evolutionary stages, with different central stars b…
Narrow belt of debris around the Sco-Cen star HD 141011
M. Bonnefoy, J. Milli, F. Menard +22
We initiated a deep-imaging survey of Scorpius-Centaurus A-F stars with predicted warm inner and cold outer belts of debris reminiscent of the architecture of emblematic systems su…
Characterizing the protolunar disk of the accreting companion GQ Lupi B
Tomas Stolker, Sebastiaan Y. Haffert, Aurora Y. Kesseli +11
GQ Lup B is a young and accreting, substellar companion that appears to drive a spiral arm in the circumstellar disk of its host star. We report high-contrast imaging observations…
Retrieving Dust Grain Sizes from Photopolarimetry: An Experimental Approach
O. Munoz, E. Frattin, T. Jardiel +8
We present the experimental phase function, degree of linear polarization (DLP), and linear depolarization (deltaL) curves of a set of forsterite samples representative of low-abso…
Revealing asymmetrical dust distribution in the inner regions of HD 141569
Garima Singh, Trisha Bhowmik, Anthony Boccaletti +42
We obtained polarimetric differential imaging of a gas-rich debris disk around HD 141569A with SPHERE in the H-band to compare the scattering properties of the innermost ring at 44…
Characterizing the morphology of the debris disk around the low-mass star GSC~07396-00759
C. Adam, J. Olofsson, R. G. van Holstein +17
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 co…
A Layered Debris Disk around M Star TWA 7 in Scattered Light
Bin Ren, Élodie Choquet, Marshall D. Perrin +15
We have obtained Hubble Space Telescope (HST) coronagraphic observations of the circumstellar disk around M star TWA 7 using the STIS instrument in visible light. Together with arc…
ALMA imaging of the M-dwarf Fomalhaut C's debris disc
Patrick F. Cronin-Coltsmann, Grant M. Kennedy, Paul Kalas +9
Fomalhaut C (LP 876-10) is a low mass M4V star in the intriguing Fomalhaut triple system and, like Fomalhaut A, possesses a debris disc. It is one of very few nearby M-dwarfs known…
HD142527: Quantitative disk polarimetry with SPHERE
S. Hunziker, H. M. Schmid, J. Ma +17
We present high-precision photometry and polarimetry for the protoplanetary disk around HD142527, with a focus on determining the light scattering parameters of the dust. We re-red…
The SPHERE infrared survey for exoplanets (SHINE) -- II. Observations, Data reduction and analysis Detection performances and early-results
M. Langlois, R. Gratton, A. -M. Lagrange +118
Over the past decades, direct imaging has confirmed the existence of substellar companions (exoplanets or brown dwarfs) on wide orbits (>10 au) from their host stars. To understand…
Limits on the presence of planets in systems with debris disks: HD 92945 and HD 107146
D. Mesa, S. Marino, M. Bonavita +38
Recent observations of resolved cold debris disks at tens of au have revealed that gaps could be a common feature in these Kuiper belt analogues. Such gaps could be evidence for th…
A search for a 5th planet around HR 8799 using the star-hopping RDI technique at VLT/SPHERE
Z. Wahhaj, J. Milli, C. Romero +8
The direct imaging of extrasolar giant planets demands the highest possible contrasts (dH ~10 magnitudes) at the smallest angular separations (~0.1'') from the star. We present an…
A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS. First polarimetric detections revealing disks around DH Tau B and GSC 6214-210 B
R. G. van Holstein, T. Stolker, R. Jensen-Clem +22
Young giant planets and brown dwarf companions emit near-infrared radiation that can be linearly polarized up to several percent. This polarization can reveal the presence of a cir…