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Improving the light curves of gravitationally lensed quasars with Gaia proper motion data
Schmidt, R. W.; Wambsganss, J.; Sorgenfrei, C.
Aims: We show how to significantly improve difference image analysis (DIA) of gravitationally lensed quasars over long periods of time using Gαία proper motions.
Methods: DIA requires the subtraction of a reference image from the individual images of a monitoring campaign, using stars in the field to align the images. Since the proper mo…
A Testbed for Tidal Migration: The 3D Architecture of an Eccentric Hot Jupiter HD 118203 b Accompanied by a Possibly Aligned Outer Giant Planet
Huber, Daniel; Claytor, Zachary R.; Saunders, Nicholas +32 more
Characterizing outer companions to hot Jupiters plays a crucial role in deciphering their origins. We present the discovery of a long-period giant planet, HD 118203 c (
Discovery and characterization of a dense sub-Saturn TOI-6651b
Bieryla, Allyson; Latham, David W.; Eastman, Jason D. +13 more
We report the discovery and characterization of a transiting sub-Saturn exoplanet TOI-6651b using PARAS-2 spectroscopic observations. The host, TOI-6651 (mV ≈ 10.2), is a sub-giant, metal-rich G-type star with [Fe / H] = 0.225‑0.0450.044[Fe/H] = 0.225‑0.045+0.044, Teff = 5940 ± 110 …
Searching for compact hierarchical triple system candidates in astrometric binaries and accelerated solutions
Bashi, D.; Tokovinin, A.
Context. Compact hierarchical triple (CHT) systems, where a tertiary component orbits an inner binary, provide critical insights into stellar formation and evolution. Despite their importance, the detection of such systems, especially compact ones, remains challenging due to the complexity of their orbital dynamics and the limitations of tradition…
Glacial sculpting of a martian cratered landscape on the northeastern flank of the Hellas basin
Moore, Jeffrey M.; Wilson, Sharon A.; Howard, Alan D. +2 more
The interiors and exteriors of the >25 km diameter Batson, Nako, Salkhad, and Jori craters (and McCauley crater to a lesser degree) on the northeastern rim of Hellas basin, Mars, were extensively modified by glacio-fluvial and glacio-lacustrine activity during the Middle and Late Amazonian, from some time before 1.4 Ga to the present as reveale…
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Henning, Thomas; Güdel, Manuel; Colina, Luis +26 more
Context. Mid-infrared imaging of exoplanets and disks is now possible with the coronographs of the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST). This wavelength range unveils new features of young directly imaged systems and allows us to obtain new constraints for characterizing the atmosphere of young giant exoplanets a…
The Emerging Stellar Complex in Mon R2: Membership and Optical Variability Classification
Hillenbrand, Lynne A.; Jiang, Sally D.
Monoceros R2 (Mon R2) is one of the closest large active star-forming regions. This extremely young and partially embedded region provides an excellent laboratory for studying star formation and the early evolution of young stellar objects (YSOs). In this paper, we conduct an optical study of the greater Mon R2 region. Beginning with 1690 previous…
Unveiling the structural content of NGC 6357 via kinematics and NIR variability
Bayo, A.; Zoccali, M.; Rojas-Arriagada, A. +3 more
NGC 6357, a star-forming complex at $\sim 1.7$ kpc from the Sun, contains giant molecular clouds and three prominent star clusters alongside H II regions, very massive stars and thousands of young stellar objects in different evolutionary stages. We present a combined infrared kinematic and time domain study of the line of sight towards this regio…
Evidence for flare-accelerated particles in large scale loops in the behind-the-limb gamma-ray solar flare of September 29, 2022
Monstein, Christian; Krucker, Säm; Veronig, Astrid M. +4 more
We report on the detection of the gamma-ray emission above 100 MeV from the solar flare of September 29, 2022, by Fermi LAT with simultaneous coverage in HXR by Solar Orbiter STIX. The Solar Orbiter-Earth separation was 178° at the time of the flare as seen from Earth, with Solar Orbiter observing the east limb. Based on STIX imaging, the flare wa…
Digging into the Ultraviolet Luminosity Functions of Galaxies at High Redshifts: Galaxies Evolution, Reionization, and Cosmological Parameters
Lei, Lei; Fan, Yi-Zhong; Wang, Yi-Ying +2 more
Thanks to the successful performance of the James Webb Space Telescope, our understanding of the epoch of reionization of the Universe has been advanced. The ultraviolet luminosity functions (UV LFs) of galaxies span a wide range of redshifts, not only revealing the connection between galaxies and dark matter (DM) halos but also providing informat…