Search Publications
Missions
Journals
Publication Years
First Resolution of Microlensed Images of a Binary-lens Event
Tan, Thiam-Guan; Thompson, I. B.; Le Bouquin, Jean-Baptiste +72 more
We resolve the multiple images of the binary-lens microlensing event ASASSN-22av using the GRAVITY instrument of the Very Large Telescope Interferometer (VLTI). The light curves show weak binary-lens perturbations, complicating the analysis, but the joint modeling with the VLTI data breaks several degeneracies, arriving at a strongly favored solut…
A Near-infrared Survey of Candidate Haumea Family Members
Fraser, Wesley C.; Pike, Rosemary E.; Ragozzine, Darin +5 more
The Haumea family is the only known dynamical family in the trans-Neptunian region. To date, 10 family members have been unambiguously identified using near-infrared (NIR) spectral or photometric data in combination with their strong dynamical proximity and the rest of the family. In this work, we build off previous empirically constructed models …
Asteroseismology of evolved stars in six star clusters observed by Kepler/K2
Chang, Heon-Young; Jo, Yun-A.
In this study, we have explored the frequency separations,
The Radial Interplanetary Field Strength at Sunspot Minimum as Polar Field Proxy and Solar Cycle Predictor
Wang, Y. -M.
The minimum value of the geomagnetic aa index has served as a remarkably successful predictor of solar cycle amplitude. This value is reached near or just after sunspot minimum, when both the near-Earth solar wind speed and interplanetary magnetic field (IMF) strength fall to their lowest values. At this time, the heliospheric current sheet is fla…
Gaia DR3 reveals the complex dynamical evolution within star clusters
Miret-Roig, N.; Randich, S.; Alves, J. +6 more
Context. Star clusters, composed of stars born from the same molecular cloud, serve as invaluable natural laboratories for understanding the fundamental processes governing stellar formation and evolution. Aims. This study aims to investigate correlations between the Mean Interdistance (
Stellar X-Ray Activity and Habitability Revealed by the ROSAT Sky Survey
Liu, Jifeng; Wang, Song; Li, Xue +3 more
Using the homogeneous X-ray catalog from ROSAT observations, we conducted a comprehensive investigation into stellar X-ray activity–rotation relations for both single and binary stars. Generally, the relation for single stars consists of two distinct regions: a weak decay region, indicating a continued dependence of the magnetic dynamo on stellar …
Geologic History of Deuteronilus Cavus in the Ismenius Lacus Region, Mars
Head, James W.; Hiesinger, Harald; Wueller, Lukas +1 more
The Ismenius Lacus region of Mars has a diverse geological history, and we present the first high-resolution map of Deuteronilus Cavus (36.2°N; 14.0°E, ∼120 km diameter) in the fretted terrain south of the dichotomy boundary. Strong evidence suggests a volcanic origin of the regional plains, based on the ∼50 m thick volcanic bed underlying 180-300…
Pulsation in TESS Objects of Interest
Janot-Pacheco, E.; Ferreira Lopes, C. E.; De Medeiros, J. R. +11 more
We report the discovery of three Transiting Exoplanet Survey Satellite Objects of Interest (TOI) with signatures of pulsation, observed in more than one sector. Our main goal is to explore how large is the variety of classical pulsators such as δ Sct, γ Dor, RR Lyrae and Cepheid among TOI pulsators. The analysis reveals two stars with signatures o…
Composition and Mineralogy of Nuclei Material of Short Period Comets Revealed by Recent Spacecraft Missions
Engrand, Cecile; Nakamura, Tomoki; Zolensky, Michael +1 more
We summarize mineralogical and compositional results from lab and in-situ spacecraft investigations of samples of comets 81P/Wild 2 and 67P/Churyumov-Gerasimenko which provide constraints to early solar system evolution. Wild 2 cometary solids were mineralogically similar to anhydrous chondritic Interplanetary Dust Particles with the exception tha…
Compositional characterization of a primordial S-type asteroid family of the inner main belt
Fornasier, S.; Delbo, M.; Ochner, P. +4 more
Context. Recently, a primordial family of moderate-albedo asteroid fragments was discovered in the inner main belt. Its age was estimated to be 4.4 ± 1.7 Gyr. However, there is a lack of compositional characterization, which is important to the study of the earliest collisions in the main belt.
Aims: In addition to the previously identified m…