Search Publications
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. IV. NIRISS Aperture Masking Interferometry Performance and Lessons Learned
Henning, Thomas; Fortney, Jonathan J.; Moran, Sarah E. +120 more
We present a performance analysis for the aperture masking interferometry (AMI) mode on board the James Webb Space Telescope Near Infrared Imager and Slitless Spectrograph (JWST/NIRISS). Thanks to self-calibrating observables, AMI accesses inner working angles down to and even within the classical diffraction limit. The scientific potential of thi…
Characterisation of the warm-Jupiter TOI-1130 system with CHEOPS and a photo-dynamical approach
Alonso, R.; Deleuil, M.; Erikson, A. +93 more
Context. Among the thousands of exoplanets discovered to date, approximately a few hundred gas giants on short-period orbits are classified as 'lonely' and only a few are in a multi-planet system with a smaller companion on a close orbit. The processes that formed multi-planet systems hosting gas giants on close orbits are poorly understood, and o…
A Photoionization Model for the Infrared Coronal Line Emission in the Classical Nova V1716 Scorpii
Evans, A.; Starrfield, S.; Page, K. L. +2 more
A near-infrared spectrum of nova V1716 Scorpii (PNV J17224490-4137160), a recent bright (
Generic low-atmosphere signatures of swirled-anemone jets
Nóbrega-Siverio, Daniel; Aulanier, Guillaume; Schmieder, Brigitte +4 more
Context. Solar jets are collimated plasma flows moving along magnetic field lines and are accelerated at low altitude following magnetic reconnection. Several of them originate from anemone-shaped low-lying arcades, and the most impulsive ones tend to be relatively wider and display untwisting motions.
Aims: We aim to establish typical behavi…
Are WASP-107-like Systems Consistent with High-eccentricity Migration?
Dai, Fei; Yu, Hang
WASP-107 b seems to be a poster child of the long-suspected high-eccentricity migration scenario. It is on a 5.7 day, polar orbit. The planet is Jupiter-like in radius but Neptune-like in mass with exceptionally low density. WASP-107 c is on a 1100 day, e = 0.28 orbit with at least Saturn mass. Planet b may still have a residual eccentricity of 0.…
The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies
Sandstrom, Karin M.; Kruijssen, J. M. Diederik; Leroy, Adam K. +29 more
We present the Physics at High Angular resolution in Nearby GalaxieS (PHANGS)-AstroSat atlas, which contains UV imaging of 31 nearby star-forming galaxies captured by the Ultraviolet Imaging Telescope on the AstroSat satellite. The atlas provides a homogeneous data set of far-UV and near-UV maps of galaxies within a distance of 22 Mpc and a median…
SDSS1335+0728: The awakening of a ∼106 M⊙ black hole
Bayo, A.; Bauer, F. E.; Merloni, A. +22 more
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the hos…
Estimating Microlensing Parameters from Observables and Stellar Isochrones with pyLIMASS
Bachelet, E.; Hundertmark, M.; Calchi Novati, S.
We present pyLIMASS, a novel algorithm for estimating the physical properties of the lensing system in microlensing events. The main idea of pyLIMASS is to combine all available information regarding the microlensing event, defined as observables, and to estimate the parameter distributions of the system, such as the lens mass and distance. The al…
Short-period pulsating hot subdwarf stars observed by TESS. II. Northern ecliptic hemisphere
Reed, M. D.; Van Grootel, V.; Charpinet, S. +5 more
We present the results of an extension of our Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed during the second and fourth years of the TESS mission, which targeted the northern ecliptic hemisphere. For many of the targets, we exploited unpublished spectroscopic data to confirm or…
Detection of Solar-like Oscillations in Subgiant and Red Giant Stars Using 2 minute Cadence TESS Data
Bi, Shaolan; Li, Yaguang; Yu, Jie +7 more
Based on all 2 minute cadence TESS light curves from Sector 1 to 60, we provide a catalog of 8651 solar-like oscillators, including frequency at maximum power ( ${\nu }_{\max }$ , with its median precision σ = 5.39%), large frequency separation (Δν, σ = 6.22%), and seismically derived masses, radii, and surface gravity values. In this sample, we h…