Search Publications
Missions
Journals
Publication Years
Ultra-Low Frequency Waves of Foreshock Origin Upstream and Inside of the Magnetospheres of Earth, Mercury, and Saturn Related to Solar Wind–Magnetosphere Coupling
Juhász, Antal; Bebesi, Zsofia; Dwivedi, Navin Kumar +2 more
This review examines ultra-low frequency (ULF) waves across different planetary environments, focusing on Earth, Mercury, and Saturn. Data from spacecraft missions (CHAMP, Swarm, and Oersted for Earth; MESSENGER for Mercury; and Cassini for Saturn) provide insights into ULF wave dynamics. At Earth, compressional ULF waves, particularly Pc3 waves, …
Witt's Hyperbola Is Both Predicted and Observed to Pass Close to the Lensing Galaxies in Quadruple Quasars
Schechter, Paul L.; Luhtaru, Richard
When a rectangular hyperbola is constructed from the image positions of a quadruply lensed quasar, as proposed by Witt, it passes very close to the lensing galaxy. The median measured perpendicular offset between the observed light center of the lens and Witt's hyperbola is 0.″013 for a sample for 39 systems lensed by a relatively isolated galaxy.…
ASASSN-21js: A multi-year transit of a ringed disc
van Boekel, R.; Kenworthy, M. A.; Pramono, T. H.
Aims: The early-type star ASASSN-21js started to fade in 2021, as was detected by the All Sky Automated Survey for Supernovae, undergoing a multi-year eclipse that is still underway. We interpret this event as being due to a structured disc of material transiting in front of the star. The disc is in orbit around a substellar object with the m…
Radio–FIR correlation: A probe into cosmic ray propagation in the nearby galaxy IC 342
Dettmar, R. -J.; Beck, R.; Tabatabaei, F. S. +6 more
Resolved studies of the correlation between the radio and far-infrared (FIR) emission from galaxies at different frequencies can unveil the interplay between star formation and the relativistic interstellar medium (ISM). Thanks to the LOFAR LoTSS observations combined with VLA, Herschel, and WISE data, we study the role of cosmic rays and magnetic…
Mars' Water Cycle and Escape: A View from Mars Express and Beyond
Aoki, S.; Villanueva, G. L.; Liuzzi, G. +12 more
The search for water on Mars has long been a theme of intense exploration, as it represents a means of addressing Mars' current climate as well as its evolution in the recent and more distant past. Since the 1970s, several missions have carried instruments to track water in the atmosphere, leading to the conceptualization of a water cycle on Mars …
Comparative study of the W UMa type binaries S Ant and ε CrA
Erdem, Ahmet; Bakış, Volkan; Blackford, Mark G. +6 more
Contact binaries challenge contemporary stellar astrophysics with respect to their incidence, structure, and evolution. We explore these issues through a detailed study of two bright examples: S Ant and $\varepsilon$ CrA, that permit high-resolution spectroscopy at a relatively good S/N ratio. The availability of high-quality photometry, including…
Establishing Baselines for Six Short-period δ Scuti Variables
Stephens, Denise C.; Hintz, Eric G.; Suggs, Christiana Z.
As part of our variable star follow-up program, we have examined a number of stars from the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey. Using a combination of our own data, ATLAS data, and other archival data, we confirmed the published periods and established a baseline ephemeris for each star. This initial sample of six stars a…
CO2 in the atmosphere of Mars depleted in 13C
Vandaele, Ann Carine; Aoki, Shohei; Liuzzi, Giuliano +14 more
We present here vertically resolved measurements of the carbon isotopic composition of CO2 in the Martian atmosphere between the surface and 50 km of altitude. The results are based on data taken by the ExoMars Trace Gas Orbiter with the NOMAD instrument and have been aggregated to derive an average vertical profile of 13C/
Quasars with flare/eclipse-like variability identified in ZTF
Dannerbauer, H.; Jin, Shuowen; Shi, Yong +4 more
Active galactic nuclei (AGNs) are known to exhibit optical/ultraviolet variability and most of them can be well modelled by the damped random walks. Physical processes that are not related to the accretion disc, such as tidal disruption events (TDEs) or moving foreground dusty clouds, can cause flare-like and eclipse-like features in the optical l…
K2-399 b is not a planet: The Saturn that wandered through the Neptune desert is actually a hierarchical eclipsing binary
Kuzuhara, M.; Fridlund, M.; Montesinos, B. +19 more
Context. The transit technique has been very efficient over the past decades in detecting planet-candidate signals. The so-called statistical validation approach has become a popular way of verifying a candidate's planetary nature. However, the incomplete consideration of false-positive scenarios and data quality can lead to misinterpretation of t…