Search Publications
Interplanetary Coronal Mass Ejections from MAVEN Orbital Observations at Mars
Feng, Xueshang; Wang, Yang; Liu, Libo +9 more
The measurements from the Mars Atmosphere and Volatile EvolutioN spacecraft, in orbit around Mars, are utilized to investigate interplanetary coronal mass ejections (ICMEs) near 1.52 au. We identify 24 ICMEs from 2014 December 6 to 2019 February 21. The ICME list is used to examine the statistical properties of ICMEs. On average, the magnetic fiel…
Energetic ions in the Venusian system: Insights from the first Solar Orbiter flyby
Kulkarni, S. R.; Maksimovic, M.; Bale, S. D. +54 more
The Solar Orbiter flyby of Venus on 27 December 2020 allowed for an opportunity to measure the suprathermal to energetic ions in the Venusian system over a large range of radial distances to better understand the acceleration processes within the system and provide a characterization of galactic cosmic rays near the planet. Bursty suprathermal ion…
Fe VII Emission Lines in the Wavelength Range 193-197 Å
Landi, Enrico; Young, Peter R.; Ryabtsev, Alexander N.
The identifications of Fe VII emission lines in the wavelength range 193-197 Å are discussed in the light of new measurements of laboratory spectra and atomic data calculations. This region is of importance to studies of solar spectra from the EUV Imaging Spectrometer (EIS) on board the Hinode spacecraft, which has its peak sensitivity at these wa…
How many suns are in the sky? A SPHERE multiplicity survey of exoplanet host stars. I. Four new close stellar companions including a white dwarf
Ginski, C.; Mugrauer, M.; Vogt, N. +2 more
Aims: We are studying the influence of stellar multiplicity on exoplanet systems and, in particular, systems that have been detected via radial-velocity searches. We are specifically interested in the closest companions as they would have a strong influence on the evolution of the original planet-forming disks. In this study, we present new c…
Wavelength Dependence of Activity-induced Photometric Variations for Young Cool Stars in Hyades
Gaidos, Eric; Miyakawa, Kohei; Hirano, Teruyuki +3 more
We investigate photometric variations due to stellar activity that induce systematic radial-velocity errors (so-called "jitter") for the four targets in the Hyades open cluster observed by the K2 mission (EPIC 210721261, EPIC 210923016, EPIC 247122957, and EPIC 247783757). Applying Gaussian process regressions to the K2 light curves and the near-i…
Seamless 3D Image Mapping and Mosaicing of Valles Marineris on Mars Using Orbital HRSC Stereo and Panchromatic Images
Tao, Yu; Michael, Greg; Muller, Jan-Peter +2 more
FEDReD. III. Unraveling the 3D structure of Vela
Arenou, F.; Babusiaux, C.; Hottier, C.
Context. The Vela complex is a region of the sky that gathers several stellar and interstellar structures in a few hundred square degrees. Aims.Gaia data now allow us to obtain a 3D view of the Vela interstellar structures through the dust extinction.
Methods: We used the FEDReD (Field Extinction-Distance Relation Deconvolver) algorithm on ne…
Populations of super-soft X-ray sources in galaxies of different morphological types
Gilfanov, M.; Galiullin, I.
Aims: We study populations of soft and super-soft X-ray sources (SSSs) in nearby galaxies of various morphological types with particular emphasis on characterizing populations of stable nuclear burning, accreting white dwarfs (WDs).
Methods: Analyzing the content of the Chandra archive, we assembled a sample of nearby galaxies suitable f…
The First Light Curve Solutions and Period Study of BQ Ari
Akyuz, A.; Aksaker, N.; Poro, A. +14 more
The first analysis of the photometric observation in BVR filters of a W UMa type binary system BQ Ari was performed. Light curve analysis was performed using Wilson-Devinney (W-D) code combined with a Monte Carlo (MC) simulation to determine its photometric and geometric elements and their uncertainties. These results show that BQ Ari is a contact…
HADES RV Programme with HARPS-N at TNG. XIII. A sub-Neptune around the M dwarf GJ 720 A
Rebolo, R.; Ribas, I.; Scandariato, G. +21 more
Context. The high number of super-Earth and Earth-like planets in the habitable zone detected around M-dwarf stars in recent years has revealed these stellar objects to be the key to planetary radial velocity (RV) searches.
Aims: Using the HARPS-N spectrograph within The HArps-n red Dwarf Exoplanet Survey (HADES) we have reached the precision…