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Interpretation of the Transit Light Curve in the Presence of Principal Main Minimum with Allowance for the Eccentricity of the Transit (Planet) Orbit
Abubekerov, M. K.; Gostev, N. Yu.
Using a high-precision algorithm for interpreting transit light curves in a model of a classical eclipsing binary star-exoplanet system, we studied the possibility of determining the system parameters in the absence of a priori knowledge of the orbital eccentricity. It was shown that it is impossible to determine the exact value of the eccentricit…
A treatment of the all-clear problem for solar energetic particle events and subsequent decision making
Georgoulis, Manolis K.
We discuss the relatively overlooked problem of All Clear in Solar Energetic Particle (SEP) event prediction. These proton and heavier ion events are injected in major solar eruptions, propagate directionally into the heliosphere at relativistic speeds and threaten equipment and personnel at low-Earth orbit and beyond. SEPs are rare to extreme eve…
New 1.38-µm Water Vapor Band Spectroscopy for a CO2 Atmosphere: H2O Measurements in the Martian Atmosphere in the SPICAM/MEX and ACS NIR/TGO Experiments
Montmessin, F.; Fedorova, A. A.; Korablev, O. I. +5 more
The H2O 1.38-µm band has been used to measure water vapor in the Martian atmosphere since the MAWD (Mars Atmospheric Water Detector) experiment on Viking-1 and -2. Currently, two experiments in orbit around Mars—SPICAM IR (SPectroscopy for the Investigation of the Characteristics of the Atmosphere of Mars InfraRed) on Mars Express and A…
Solar Orbiter Observations of Proton and Alpha Particle Kinetic Signatures Related to the Presence of Switchbacks in the Inner Heliosphere: A Case Study
Telloni, Daniele; D'Amicis, Raffaella; Perrone, Denise +6 more
We investigate how ions, namely protons and alpha particles, kinetically react to the presence of strong deflections in the magnetic field, the so-called switchbacks, in the first stream of slow Alfvénic wind observed by Solar Orbiter at the heliocentric distance of 0.64 au. We focus on an isolated, large-scale switchback, and we study in detail i…
Source Region and Launch Characteristics of Magnetic-arch-blowout Solar Coronal Mass Ejections Driven by Homologous Compact-flare Blowout Jets
Joshi, Bhuwan; Moore, Ronald L.; Sterling, Alphonse C. +1 more
We study the formation of four coronal mass ejections (CMEs) originating from homologous blowout jets. All of the blowout jets originated from NOAA Active Region (AR) 11515 on 2012 July 2, within a time interval of ≈14 hr. All of the CMEs were wide (angular widths ≈ 95°–150°), and propagated with speeds ranging between ≈300 and 500 km s‑1
Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System
Butler, R. Paul; Kane, Stephen R.; Wittenmyer, Robert A. +16 more
Multiplanet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, as their long observational baselines allow for searches for more distant planetary orbits. This work provides a significantly…
Nuclear structure and direct reaction studies in particle- γ coincidence experiments at the FSU John D. Fox superconducting linear accelerator laboratory
Spieker, Mark-Christoph; Almaraz-Calderon, Sergio
Since its foundation in the 1960s, the John D. Fox Superconducting Linear Accelerator Laboratory at Florida State University (FSU) pursued research at the forefront of nuclear science. In this contribution, we present recent highlights from nuclear structure and reaction studies conducted at the John D. Fox Superconducting Linear Accelerator Labor…
New orbital periods of high-inclination dwarf novae based on Gaia Alerts photometry
Vogt, N.; Zorotovic, M.; Vega-Manubens, I. +8 more
The orbital period of a cataclysmic variable stands as a crucial parameter for investigating the structure and physics of these binary systems, as well as understanding their evolution. We use photometric Gaia data for dwarf novae (DNe) in the quiescent state – which are available for a number of years – to determine new orbital periods and improv…
Long- and short-term variability of the possible nascent planetary nebula IRAS 22568+6141: A late thermal pulse?
Miranda, Luis F.; Morisset, Christophe; Cala, Roldán A. +4 more
IRAS 22568+6141 has been classified as a low-excitation planetary nebula (PN) and presents non-thermal radio continuum emission, which could be a signature of a nascent PNe. We present intermediate-resolution long-slit spectra obtained in 2021 and 2023, high-resolution long-slit spectra taken in 2023, and a light curve at the r filter between 1953…
Investigation into the origin of the soft excess in Ark 564 using principal component analysis
Yang, X. J.; Zhang, G. B.; Lyu, M. +1 more
We combined a principal component analysis (PCA) and spectroscopy to investigate the origin of the soft excess in narrow-line Seyfert 1 galaxy Ark 564 with XMM-Newton observations over a period of ten years. We find that the principal components in different epochs are very similar, suggesting stable variability patterns in this source. More impor…