Ben J. Sutlieff
A5090533479- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Adaptive optics and wavefront sensing
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Spectroscopy and Laser Applications
- Optical Polarization and Ellipsometry
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Infrared Target Detection Methodologies
- CCD and CMOS Imaging Sensors
- Diverse Education Studies and Reforms
- Gamma-ray bursts and supernovae
- Indigenous and Place-Based Education
University of Amsterdam
2020-2024
Leiden University
2021-2024
University of Edinburgh
2023-2024
Royal Observatory
2023-2024
Scottish Universities Physics Alliance
2024
Astronomical Institute of the Slovak Academy of Sciences
2021-2023
University of Leicester
2020
University of Exeter
2018
Abstract The unprecedented medium-resolution ( R λ ∼ 1500–3500) near- and mid-infrared (1–18 μ m) spectrum provided by JWST for the young (140 ± 20 Myr) low-mass (12–20 M Jup ) L–T transition (L7) companion VHS 1256 b gives access to a catalog of molecular absorptions. In this study, we present comprehensive analysis data set utilizing forward-modeling approach applying our Bayesian framework, ForMoSA . We explore five distinct atmospheric models assess their performance in estimating key...
We report results from 8 hours of JWST/MIRI LRS spectroscopic monitoring directly followed by 7 JWST/NIRSpec prism the benchmark binary brown dwarf WISE 1049AB, closest, brightest dwarfs known. find water, methane, and CO absorption features in both components, including 3.3 $\mu$m methane feature a tentative detection small grain ($<$ 1$\mu$m) silicate at $>$8.5 1049A. Both components vary significantly ($>$1$\%$), with 1049B displaying larger variations than Using K-means clustering, we...
Over the last decade, vector-apodizing phase plate (vAPP) coronagraph has been developed from concept to on-sky application in many high-contrast imaging systems on 8-m class telescopes. The vAPP is an geometric-phase patterned that inherently broadband, and its manufacturing enabled only by direct-write technology for liquid-crystal patterns. generates two coronagraphic PSFs cancel starlight opposite sides of point spread function (PSF) have circular polarization states. efficiency, amount...
Clouds and other features in exoplanet brown dwarf atmospheres cause variations brightness as they rotate out of view. Ground-based instruments reach the high contrasts small inner working angles needed to monitor these faint companions, but their fields-of-view lack simultaneous photometric references correct for non-astrophysical variations. We present a novel approach making ground-based light curves directly imaged companions using high-cadence differential spectrophotometric monitoring,...
We report the discovery of a circumstellar debris disk viewed nearly edge-on and associated with young, K1 star BD+45$^{\circ}$598 using high-contrast imaging at 2.2$\mu$m obtained W.M.~Keck Observatory. detect in scattered light peak significance $\sim$5$\sigma$ over three epochs, our best-fit model is an almost $\sim$70 AU ring, inclination angle $\sim$87$^\circ$. Using NOEMA interferometer Plateau de Bure Observatory operating 1.3mm, we find resolved continuum emission aligned ring...
Giant, wide-separation planets often lie in the gap between multiple, distinct rings of circumstellar debris: this is case for HR\,8799 and HD\,95086 systems, even solar system where Asteroid Kuiper belts enclose four gas ice giants. In that a debris disk, inferred from an infrared excess SED, best modelled as two temperatures, we infer presence spatially separated debris. Giant may well exist these debris, indeed could be responsible formation belts. We observe 24 such two-belt systems...
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 dark hole deep flux suppression adjacent PSF core. Here, we recover known brown dwarf HR 2562 B using vAPP coronagraph, in conjunction with Magellan Adaptive Optics (MagAO) system, at signal-to-noise S/N = 3.04 lesser studied L-band regime. data contained mix field and pupil-stabilised observations, hence explored three...
The vector Apodizing Phase Plate (vAPP) is a pupil plane coronagraph that suppresses starlight by forming dark hole in its point spread function (PSF). unconventional and non-axisymmetrical PSF arising from the phase modification applied this presents special challenge to post-processing techniques. We aim implement recently developed algorithm, temporal reference analysis of planets (TRAP) on vAPP coronagraphic data. property TRAP uses non-local training pixels, combined with vAPP, allows...
We advocate for the prioritization of high-precision photometric monitoring exoplanet and brown dwarf companions to detect brightness variability arising from features in their atmospheres. Measurements provide not only an insight into physical appearances these companions, but are also a direct probe atmospheric structures dynamics, yield valuable estimates rotation periods. JWST is uniquely capable faint over full periods, thanks its inherent stability powerful high-contrast coronagraphic...
The time variability and spectra of directly imaged companions provide insight into their physical properties atmospheric dynamics. We present follow-up R~40 spectrophotometric monitoring red companion HD 1160 B at 2.8-4.2 $\mu$m using the double-grating 360{\deg} vector Apodizing Phase Plate (dgvAPP360) coronagraph ALES integral field spectrograph on Large Binocular Telescope Interferometer. use recently developed technique gvAPP-enabled differential spectrophotometry to produce light...
ABSTRACT The time variability and spectra of directly imaged companions provide insight into their physical properties atmospheric dynamics. We present follow-up R ∼ 40 spectrophotometric monitoring red companion HD 1160 B at 2.8–4.2 μm using the double-grating 360° vector Apodizing Phase Plate (dgvAPP360) coronagraph ALES integral field spectrograph on Large Binocular Telescope Interferometer. use recently developed technique gvAPP-enabled differential spectrophotometry to produce light...
We propose a comprehensive survey of giant planets ranging from close-in highly irradiated hot Jupiters to young, wide-orbit directly imaged planets. The combination two established techniques for probing planetary atmospheric compositions (time-series transit observations and high-contrast spectroscopy) will provide an unprecedented window into gaseous planet across range equilibrium temperatures (100-2000 K), orbital separations (0.1-100 au), system ages (10 Myr-1 Gyr). To-date,...
We advocate for a large scale imaging survey of nearby young moving groups and star-forming regions to directly detect exoplanets over an unexplored range masses, ages orbits. Discovered objects will be identified early enough in JWST's lifetime leverage its unparalleled capabilities long-term atmospheric characterisation, uniquely complement the known population brown dwarfs. Furthermore, this constrain occurrence novel wide sub-Jovian exoplanet population, informing multiple theories...
Clouds and other features in exoplanet brown dwarf atmospheres cause variations brightness as they rotate out of view. Ground-based instruments reach the high contrasts small inner working angles needed to monitor these faint companions, but their fields-of-view lack simultaneous photometric references correct for non-astrophysical variations. We present a novel approach making ground-based light curves directly imaged companions using high-cadence differential spectrophotometric monitoring,...
The vector Apodizing Phase Plate (vAPP) is a pupil plane coronagraph that suppresses starlight by forming dark hole in its point spread function (PSF). unconventional and non-axisymmetrical PSF arising from the phase modification applied this presents special challenge to post-processing techniques. We aim implement recently developed algorithm, temporal reference analysis of planets (TRAP) on vAPP coronagraphic data. property TRAP uses non-local training pixels, combined with vAPP, allows...
The unprecedented medium-resolution (R~1500-3500) near- and mid-infrared (1-18um) spectrum provided by JWST for the young (140+/-20Myr) low-mass (12-20MJup) L-T transition (L7) companion VHS1256b gives access to a catalogue of molecular absorptions. In this study, we present comprehensive analysis dataset utilizing forward modelling approach, applying our Bayesian framework, ForMoSA. We explore five distinct atmospheric models assess their performance in estimating key parameters: Teff,...
Space School UK (SSUK) is aseries ofsummer residential programmesfor secondary school agedstudents,held at the University of Leicester over 3 weeks each year. Each programme involves space-related activities run by a team mentors -currently including university students, graduates, teachers and young professionals associated with spacesector -all whom attendedSSUKas students themselves. It includes 6-day 8-day Senior (collectively SSUK) which are for 13â15 16â18 year olds...