Search Publications
Deep Entry of Low-Energy Ions Into Mercury's Magnetosphere: BepiColombo Mio's Third Flyby Observations
Persson, Moa; Saito, Yoshifumi; Delcourt, Dominique +15 more
Although solar wind-driven convection is expected to dominate magnetospheric circulation at Mercury, its exact pattern remains poorly characterized by observations. Here we present BepiColombo Mio observations during the third Mercury flyby indicative of convection-driven transport of low-energy dense ions into the deep magnetosphere. During the f…
Planet-star interactions with precise transit timing: IV. Probing the regime of dynamical tides for GK host stars
Casanova, V.; Fernández, M.; Maciejewski, G. +3 more
Context. Giant exoplanets on 1-3 day orbits, known as ultra-hot Jupiters, induce detectable tides in their host stars. The energy of those tides dissipates at a rate related to the properties of the stellar interior. At the same time, a planet loses its orbital angular momentum and spirals into the host star. The decrease in the orbital period is …
Nonparametric Bayesian reconstruction of Galactic magnetic fields using information field theory: The inclusion of line-of-sight information in ultrahigh-energy cosmic-ray backtracing
Enßlin, Torsten; Edenhofer, Gordian; Pavlidou, Vasiliki +4 more
Context. Ultrahigh-energy cosmic rays (UHECRs) are charged particles with energies surpassing 1018 eV. Their sources remain elusive because they are obscured by deflections caused by the Galactic magnetic field (GMF). This challenge is further complicated by our limited understanding of the 3D structure of the GMF because current GMF ob…
The Plane Quasar Survey: First Data Release
Tchernyshyov, Kirill; Zheng, Yong; Werk, Jessica +4 more
We present a sample of 305 QSO candidates having ∣b∣ < 30°, the majority with GALEX magnitudes near-UV < 18.75. To generate this sample, we apply UV–IR color selection criteria to photometric data from the Ultraviolet Galactic Plane Survey as part of GALEX-CAUSE, the Million Quasars Catalog, Gaia DR2, and Pan-STARRS DR1. 165 of these 305 can…
Chemical evolution models: the role of type Ia supernovae in the α-elements over iron relative abundances and their variations in time and space
Galbany, L.; Monteiro, H.; Mollá, M. +6 more
The role of type Ia supernovae (SN Ia), mainly the delay time distributions (DTDs) determined by the binary systems, and the yields of elements created by different explosion mechanisms, are studied by using the MULCHEM chemical evolution model applied to our Galaxy. We explored 15 DTDs and 12 tables of elemental yields produced by different SN Ia…
Accretion properties of a low-mass active galactic nucleus: UGC 6728
Safi-Harb, Samar; Naik, Sachindra; Chatterjee, Arka +4 more
We present a comprehensive analysis of approximately 15 years (2006-2021) of X-ray observations of UGC 6728, a low-mass bare AGN, for the first time. Our study encompasses both spectral and temporal aspects of this source. The spectral properties of this source are studied using various phenomenological and physical models. We conclude that (a) th…
The interaction of a large-scale nuclear wind with the high-velocity H II region G0.17+0.15
Yusef-Zadeh, F.; Wardle, M.; Rudnick, L. +4 more
We investigate the nature of a Galactic Centre source, G0.17+0.15, lying along the northern extension of the radio arc near l ~ 0.2°. G0.17+0.15 is an H II region located towards the eastern edge of the radio bubble, embedded within the highly polarized Galactic Centre eastern lobe where a number of radio filaments appear to cross through the H II…
Element abundances of galactic RGB stars in the APO-K2 catalogue: Dissimilarity in the scaling with [α/Fe]
Valle, G.; Dell'Omodarme, M.; Prada Moroni, P. G. +1 more
Aims. We conducted an investigation on the chemical abundances of 4316 stars in the red giant branch (RGB) phase from the recently released APO-K2 catalogue. Our aim was to characterize the abundance trends of the single elements with [α/Fe], mainly focusing on C, N, and O, which are the most relevant for the estimation of stellar ages. Methods. T…
A patchy CO2 exosphere on Ganymede revealed by the James Webb Space Telescope
Leblanc, François; de Pater, Imke; Wong, Michael H. +25 more
Jupiter's icy moon Ganymede has a tenuous exosphere produced by sputtering and possibly sublimation of water ice. To date, only atomic hydrogen and oxygen have been directly detected in this exosphere. Here, we present observations of Ganymede's CO2 exosphere obtained with the James Webb Space Telescope. CO2 gas is observed o…
Geological Record of Water and Wind Processes on Mars as Observed by the Mars Express High Resolution Stereo Camera
Jaumann, R.; Tirsch, D.; Hiesinger, H. +9 more
This review paper summarizes the observations and results of the Mars Express Mission and its application in the analysis of geological processes and landforms on Mars during the last 20 years. The Mars Express observations provided an extended data base allowing a comparative evaluation of different geological surface landforms and their time-bas…