Search Publications
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…
Forgotten treasures in the HST/FOC UV imaging polarimetric archives of active galactic nuclei: III. Five years monitoring of M87
Lopez-Rodriguez, E.; Marin, F.; Wu, K. +1 more
Context. The active galactic nucleus within M87, a giant elliptical galaxy, is responsible for one of the closest kiloparsec-scale relativistic jets to Earth. It is thus a perfect target for spatially resolved observations. Aims. This one-sided jet has been extensively observed at almost all wavelengths, with almost all techniques. Among many othe…
SMC-Last Extracted Photometry
Boyer, M. L.; Oliveira, Joana M.; van Loon, Jacco Th. +11 more
We present point-source photometry from the Spitzer Space Telescope's final survey of the Small Magellanic Cloud (SMC). We mapped nearly 30 deg2 in two epochs in 2017, with the second extending to early 2018 at 3.6 and 4.5 µm using the Infrared Array Camera. This survey duplicates the footprint from the SAGE-SMC program in 2008. T…
Determining stellar properties of massive stars in NGC346 in the SMC with a Bayesian statistic technique
Hamann, W. -R.; Prinja, R. K.; Oskinova, L. M. +8 more
Context. NGC 346 is a young cluster with numerous hot OB stars. It is part of the Small Magellanic Cloud (SMC), and has an average metallicity that is one-seventh of the Milky Way's. A detailed study of its stellar content provides a unique opportunity to understand the stellar and wind properties of massive stars in low-metallicity environments, …