152 citations · 2.7k across the 105 of their papers we have counts for
22 papers · 1 filter
Planet-wide, Concentric Density Waves in Venus's Upper Atmosphere Revealed through Polarimetry?
Gourav Mahapatra, Michiel Rodenhuis, Frans Snik +3
We report observations of faint (), concentric, planet-wide rings in the polarized flux of sunlight that is reflected by Venus, obtained during a serendipitous, 36-minute…
Visible extreme adaptive optics on extremely large telescopes: Towards detecting oxygen in Proxima Centauri b and analogs
J. Fowler, Sebastiaan Y. Haffert, Maaike A. M. van Kooten +38
Looking to the future of exo-Earth imaging from the ground, core technology developments are required in visible extreme adaptive optics (ExAO) to enable the observation of atmosph…
Improved companion mass limits for Sirius A with thermal infrared coronagraphy using a vector-apodizing phase plate and time-domain starlight-subtraction techniques
Joseph D. Long, Jared R. Males, Sebastiaan Y. Haffert +12
We use observations with the infrared-optimized MagAO system and Clio camera in 3.9 m light to place stringent mass constraints on possible undetected companions to Sirius A. We…
Measuring the variability of directly imaged exoplanets using vector Apodizing Phase Plates combined with ground-based differential spectrophotometry
Ben J. Sutlieff, Jayne L. Birkby, Jordan M. Stone +11
Clouds and other features in exoplanet and brown dwarf atmospheres cause variations in brightness as they rotate in and out of view. Ground-based instruments reach the high contras…
Spectropolarimetry of life: airborne measurements from a hot air balloon
Willeke Mulder, C. H. Lucas Patty, Stefano Spadaccia +6
Does life exist outside our Solar System? A first step towards searching for life outside our Solar System is detecting life on Earth by using remote sensing applications. One powe…
L-band Integral Field Spectroscopy of the HR 8799 Planetary System
David S. Doelman, Jordan M. Stone, Zackery W. Briesemeister +12
Understanding the physical processes sculpting the appearance of young gas-giant planets is complicated by degeneracies confounding effective temperature, surface gravity, cloudine…
The 13O-rich atmosphere of a young accreting super-Jupiter
Yapeng Zhang, Ignas Snellen, Alexander J. Bohn +8
Isotope abundance ratios play an important role in astronomy and planetary sciences, providing insights in the origin and evolution of the Solar System, interstellar chemistry, and…
High-contrast observations of brown dwarf companion HR 2562 B with the vector Apodizing Phase Plate coronagraph
Ben J. Sutlieff, Alexander J. Bohn, Jayne L. Birkby +8
The vector Apodizing Phase Plate (vAPP) is a class of pupil plane coronagraph that enables high-contrast imaging by modifying the Point Spread Function (PSF) to create a dark hole…
Biosignatures of the Earth I. Airborne spectropolarimetric detection of photosynthetic life
C. H. Lucas Patty, Jonas G. Kühn, Petar H. Lambrev +10
Context. Homochirality is a generic and unique property of life on Earth and is considered a universal and agnostic biosignature. Homochirality induces fractional circular polariza…
Discovery of a directly imaged planet to the young solar analog YSES 2
Alexander J. Bohn, Christian Ginski, Matthew A. Kenworthy +8
Abbreviated. By selecting stars with similar ages and masses, the Young Suns Exoplanet Survey (YSES) aims to detect and characterize planetary-mass companions to solar-type host st…
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…
Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1
Alexander J. Bohn, Matthew A. Kenworthy, Christian Ginski +9
Even though tens of directly imaged companions have been discovered in the past decades, the number of directly confirmed multiplanet systems is still small. Dynamical analysis of…
SPHERE+: Imaging young Jupiters down to the snowline
A. Boccaletti, G. Chauvin, D. Mouillet +130
SPHERE (Beuzit et al,. 2019) has now been in operation at the VLT for more than 5 years, demonstrating a high level of performance. SPHERE has produced outstanding results using a…
The Young Suns Exoplanet Survey: Detection of a wide orbit planetary mass companion to a solar-type Sco-Cen member
A. J. Bohn, M. A. Kenworthy, C. Ginski +9
The Young Suns Exoplanet Survey (YSES) consists of a homogeneous sample of 70 young, solar-mass stars located in the Lower Centaurus-Crux subgroup of the Scorpius-Centaurus associa…
RefPlanets: Search for reflected light from extra-solar planets with SPHERE/ZIMPOL
S. Hunziker, H. M. Schmid, D. Mouillet +55
RefPlanets is a guaranteed time observation (GTO) programme that uses the Zurich IMaging POLarimeter (ZIMPOL) of SPHERE/VLT for a blind search for exoplanets in wavelengths from 60…
ESA Voyage 2050 White Paper: Detecting life outside our solar system with a large high-contrast-imaging mission
Ignas Snellen, Simon Albrecht, Guillem Anglada-Escude +64
In this white paper, we recommend the European Space Agency plays a proactive role in developing a global collaborative effort to construct a large high-contrast imaging space tele…
Circular spectropolarimetric sensing of vegetation in the field; possibilities for the remote detection of extraterrestrial life
C. H. Lucas Patty, Inge Loes ten Kate, Wybren Jan Buma +4
Homochirality is a generic and unique property of all biochemical life and the fractional circular polarization of light it induces therefore constitutes a potentially unambiguous…
First direct detection of a polarized companion outside of a resolved circumbinary disk around CS Cha
C. Ginski, M. Benisty, R. G. van Holstein +18
In the present study we aim to investigate the circumstellar environment of the spectroscopic binary T Tauri star CS Cha. From unresolved mid- to far-infrared photometry it is pred…
Combining angular differential imaging and accurate polarimetry with SPHERE/IRDIS to characterize young giant exoplanets
Rob G. van Holstein, Frans Snik, Julien H. Girard +11
Young giant exoplanets emit infrared radiation that can be linearly polarized up to several percent. This linear polarization can trace: 1) the presence of atmospheric cloud and ha…
BP Piscium: its flaring disk imaged with SPHERE/ZIMPOL
J. de Boer, J. H. Girard, H. Canovas +9
Whether BP Piscium (BP Psc) is either a pre-main sequence T Tauri star at d ~ 80 pc, or a post-main sequence G giant at d ~ 300 pc is still not clear. As a first-ascent giant, it i…
Multiple rings in the transition disk and companion candidates around RXJ1615.3-3255. High contrast imaging with VLT/SPHERE
J. de Boer, G. Salter, M. Benisty +36
We search for signs of ongoing planet-disk interaction and study the distribution of small grains at the surface of the transition disk around RXJ1615.3-3255 (RX J1615). We observe…
Observing the Earth as an exoplanet with LOUPE, the Lunar Observatory for Unresolved Polarimetry of Earth
T. Karalidi, D. M. Stam, F. Snik +3
The detections of small, rocky exoplanets have surged in recent years and will likely continue to do so. To know whether a rocky exoplanet is habitable, we have to characterise its…