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Cometary dust analogues for physics experiments
Zhang, X.; Sierks, H.; Blum, J. +25 more
The CoPhyLab (Cometary Physics Laboratory) project is designed to study the physics of comets through a series of earth-based experiments. For these experiments, a dust analogue was created with physical properties comparable to those of the non-volatile dust found on comets. This 'CoPhyLab dust' is planned to be mixed with water and CO2
TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +60 more
We report the discovery of TOI-2285b, a sub-Neptune-sized planet transiting a nearby (42 pc) M dwarf with a period of 27.3 d. We identified the transit signal from the Transiting Exoplanet Survey Satellite photometric data, which we confirmed with ground-based photometric observations using the multiband imagers MuSCAT2 and MuSCAT3. Combining thes…
Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40
Kuzuhara, M.; Tamura, M.; Kudo, T. +45 more
Context. Despite being a prominent subset of the exoplanet population discovered in the past three decades, the nature and provenance of sub-Neptune-sized planets is still one of the open questions in exoplanet science.
Aims: For planets orbiting bright stars, precisely measuring the orbital and planet parameters of the system is the best app…
Super-resolution of Solar Magnetograms Using Deep Learning
Xu, Long; Zhao, Dong; Dou, Fengping +2 more
Currently, data-driven models of solar activity forecast are investigated extensively by using machine learning. For model training, it is highly demanded to establish a large database which may contain observations coming from different instruments with different spatio-temporal resolutions. In this paper, we employ deep learning models for super…
Physical properties of more than one thousand brightest cluster galaxies detected in the Canada-France-Hawaii Telescope Legacy Survey
Durret, F.; Márquez, I.; Sarron, F. +1 more
Context. Brightest cluster galaxies (BCGs) are very massive elliptical galaxies found at the centres of clusters. Their study gives clues to the formation and evolution of the clusters in which they are embedded.
Aims: We analyse here in a homogeneous way the properties of a sample of more than 1000 BCGs in the redshift range 0.15 < z <…
HD 20329b: An ultra-short-period planet around a solar-type star found by TESS
Pallé, E.; Dai, F.; Gandolfi, D. +45 more
Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown.
Aims: We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Tra…
The TESS Triple-9 Catalog: 999 uniformly vetted exoplanet candidates
Kostov, Veselin B.; Colón, Knicole D.; Christiansen, Jessie L. +20 more
The Transiting Exoplanet Survey Satellite (TESS) has detected thousands of exoplanet candidates since 2018, most of which have yet to be confirmed. A key step in the confirmation process of these candidates is ruling out false positives through vetting. Vetting also eases the burden on follow-up observations, provides input for demographics studie…
Solar Wind Charge Exchange Soft X-Ray Emissions in the Magnetosphere during an Interplanetary Coronal Mass Ejection Compared to Its Driven Sheath
Liu, Ying D.; Sun, Wei; Ji, Li +9 more
Soft X-ray emissions from solar wind charge exchange (SWCX) are applied in a recently developed approach to study the magnetosphere using panoramic soft X-ray imaging. This study represents the first attempt to distinguish magnetospheric SWCX emissions observed by XMM-Newton during the impact of an interplanetary coronal mass ejection (ICME) and i…
Fundamental effective temperature measurements for eclipsing binary stars - III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31
Alonso, R.; Deleuil, M.; Erikson, A. +74 more
EBLM J0113+31 is a moderately bright (V = 10.1), metal-poor ([Fe/H] ≈-0.3) G0V star with a much fainter M dwarf companion on a wide, eccentric orbit (= 14.3 d). We have used near-infrared spectroscopy obtained with the SPIRou spectrograph to measure the semi-amplitude of the M dwarf's spectroscopic orbit, and high-precision photometry of the eclip…
Inner southern magnetosphere observation of Mercury via SERENA ion sensors in BepiColombo mission
Kallio, E.; Barabash, S.; Holmström, M. +89 more
Mercury's southern inner magnetosphere is an unexplored region as it was not observed by earlier space missions. In October 2021, BepiColombo mission has passed through this region during its first Mercury flyby. Here, we describe the observations of SERENA ion sensors nearby and inside Mercury's magnetosphere. An intermittent high-energy signal, …