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TOI-4504: Exceptionally Large Transit Timing Variations Induced by Two Resonant Warm Gas Giants in a Three-planet System
Trifonov, Trifon; Henning, Thomas; Vanderburg, Andrew +24 more
We present a joint analysis of transit timing variations (TTVs) and Doppler data for the transiting exoplanet system TOI-4504. TOI-4504 c is a warm Jupiter-mass planet that exhibits the largest known TTVs, with a peak-to-node amplitude of ∼2 days, the largest value ever observed, and a superperiod of ~930 days. TOI-4504 b and c were identified in …
Stellar Evolution and Axion-Like Particles: New Constraints and Hints from Globular Clusters in the GAIA DR3 Data
Troitsky, S. V.
Axion-like particles (ALPs) are hypothetical pseudoscalar bosons, natural in extensions of the Standard Model. Their interactions with ordinary matter and radiation are suppressed, making it challenging to detect them in laboratory experiments. However, these particles, produced within stellar interiors, can provide an additional mechanism for ene…
Flaring together: A preferred angular separation between sympathetic flares on the Sun
Strugarek, A.; Charbonneau, P.; Guité, L. -S.
Context. Sympathetic solar flares are eruptions that occur nearby in space and time, driven by an apparent interaction between the active regions in which they are triggered. Their statistical existence on the Sun has yet to be firmly established. Aims. The main goal of this paper is to identify a statistical signature of sympathetic flares, chara…
X-ray and optical analysis of the distant merging double cluster SPT-CLJ2228-5828, its gas bridge, and its shock front
Sharon, K.; Schrabback, T.; Zenteno, A. +16 more
Galaxy cluster mergers are excellent laboratories for studying a wide variety of different physical phenomena. An example of such a cluster system is the distant SPT-CLJ2228-5828 merger located at z ≈ 0.77. Previous analyses via the thermal Sunyaev-Zeldovich effect and weak lensing (WL) data suggested that the system was potentially a dissociative…
The refractory-to-ice ratio in comet 67P: Implications on the composition of the comet-forming region of the protoplanetary disk
Morbidelli, Alessandro; Marschall, Raphael; Marrocchi, Yves
Comets, asteroids, and other small bodies are thought to be remnants of the original planetesimal population of the Solar System. As such, their physical, chemical, and isotopic properties hold crucial details on how and where they formed and how they evolved. Yet, placing precise constraints on the formation region of these bodies has been challe…
On Alfvénic turbulence of solar wind streams observed by Solar Orbiter during March 2022 perihelion and their source regions
Livi, S.; van Driel-Gesztelyi, L.; Matteini, L. +31 more
Context. It has been recently accepted that the standard classification of the solar wind solely according to flow speed is outdated, and particular interest has been devoted to the study of the origin and evolution of so-called Alfvénic slow solar wind streams and to what extent such streams resemble or differ from fast wind. Aims. In March 2022,…
Identifying Galactic Substructures in 5D Space Using All-sky RR Lyrae Stars in Gaia DR3
Liu, Gaochao; Huang, Yang; Rix, Hans-Walter +9 more
Motivated by the vast gap between photometric and spectroscopic data volumes, there is great potential in using 5D kinematic information to identify and study substructures of the Milky Way. We identify substructures in the Galactic halo using 46,575 RR Lyrae stars (RRLs) from Gaia Data Release 3, with photometric metallicities and distances newly…
A Data-driven M Dwarf Model and Detailed Abundances for ∼17,000 M Dwarfs in SDSS-V
Cunha, Katia; Souto, Diogo; Angus, Ruth +5 more
The cool temperatures of M dwarf atmospheres enable complex molecular chemistry, making robust characterization of M dwarf compositions a long-standing challenge. Recent modifications to spectral synthesis pipelines have enabled more accurate modeling of M dwarf atmospheres, but these methods are too slow for characterizing more than a handful of …
Multi-spacecraft observations of the decay phase of solar energetic particle events
Laitinen, T.; Wimmer-Schweingruber, R. F.; Dalla, S. +3 more
Context. The parameters of solar energetic particle (SEP) event profiles such as the onset time and peak time have been researched extensively to obtain information on the acceleration and transport of SEPs. The corotation of particle-filled magnetic flux tubes with the Sun is generally thought to play a minor role in determining intensity profile…
An Overview of Solar Orbiter Observations of Interplanetary Shocks in Solar Cycle 25
Maksimovic, Milan; Wimmer-Schweingruber, Robert F.; Dresing, Nina +17 more
Interplanetary (IP) shocks are fundamental constituents of the heliosphere, where they form as a result of solar activity. We use previously unavailable measurements of IP shocks in the inner heliosphere provided by Solar Orbiter, and present a survey of the first 100 shocks observed in situ at different heliocentric distances during the rising ph…