Search Publications
Deep X-ray view of the Class I YSO Elias 29 with XMM-Newton and NuSTAR
Micela, G.; Reale, F.; Sciortino, S. +4 more
X-ray emission is a characteristic feature of young stellar objects (YSOs) and the result of the interplay between rotation, magnetism, and accretion. For this reason high energy phenomena are key elements to understand the process of star formation, the evolution of their circumstellar disks, and eventually the formation of planets. We investigat…
Measuring relative abundances in the solar corona with optimised linear combinations of spectral lines
Buchlin, Éric; Zambrana Prado, Natalia
Context. Elemental abundances in some coronal structures differ significantly from photospheric abundances, with a dependence on the first ionization potential (FIP) of the element. Measuring these FIP-dependent abundance biases is important for coronal and heliospheric physics.
Aims: We aim to build a method for optimal determination of FIP …
Dynamic field line draping at comet 67P/Churyumov-Gerasimenko during the Rosetta dayside excursion
Henri, Pierre; Nilsson, Hans; Behar, Etienne +9 more
Context. The Rosetta dayside excursion took place in September-October 2015 when comet 67P/Churyumov-Gerasimenko (67P/CG) was located at 1.36 AU from the Sun after it had passed perihelion on 13 August 2015 at 1.25 AU. At this time, the comet was near its most active period, and its interaction with the solar wind was expected to be at its most in…
Rosetta/OSIRIS observations of the 67P nucleus during the April 2016 flyby: high-resolution spectrophotometry
Lamy, P. L.; Lara, L. M.; Bertaux, J. -L. +35 more
Context. From August 2014 to September 2016, the Rosetta spacecraft followed comet 67P/Churyumov-Gerasimenko along its orbit. After the comet passed perihelion, Rosetta performed a flyby manoeuvre over the Imhotep-Khepry transition in April 2016. The OSIRIS/Narrow-Angle-Camera (NAC) acquired 112 observations with mainly three broadband filters (ce…
Three-dimensional analysis of spatial resolution of MIRO/Rosetta measurements at 67P/Churyumov-Gersimenko
Shi, X.; Hartogh, P.; Rezac, L. +3 more
Context. The MIRO instrument's remote sensing capability is integral to constraining water density, temperature, and velocity fields in the coma of 67P/Churyumov-Gersimenko.
Aims: Our aim is to quantify how much water density originates from the facets of the shape model within the field of view of MIRO versus the water contribution from all …
Influence of collisions on ion dynamics in the inner comae of four comets
Eriksson, A.; Vigren, E.; Galand, M. +2 more
Context. Collisions between cometary neutrals in the inner coma of a comet and cometary ions that have been picked up into the solar wind flow and return to the coma lead to the formation of a broad inner boundary known as a collisionopause. This boundary is produced by a combination of charge transfer and chemical reactions, both of which are imp…
Acoustic oscillations and dynamo action in the G8 sub-giant EK Eridani
Pallé, P. L.; Stello, D.; Corsaro, E. +3 more
We present further evidence of acoustic oscillations in the slowly rotating overactive G8 sub-giant EK Eri. This star was observed with the 1m Hertzsprung SONG telescope at the Observatorio del Teide for two different runs of 8 and 13 nights, respectively, that were separated by about a year. We determined a significant excess of power around ν
Solving the distance discrepancy for the open cluster NGC 2453. The planetary nebula NGC 2452 is not a cluster member
Silva-Villa, E.; Moitinho, A.; Moni Bidin, C. +6 more
Context. The open cluster (OC) NGC 2453 is of particular importance since it has been considered to host the planetary nebula (PN) NGC 2452, however their distances and radial velocities are strongly contested.
Aims: In order to obtain a complete picture of the fundamental parameters of the OC NGC 2453, 11 potential members were studied. The …
A multiwavelength study of filamentary cloud G341.244-00.265
Wang, Jun-Jie; Yu, Nai-Ping; Xu, Jing-Long
We present a multiwavelength study toward the filamentary molecular cloud G341.244-00.265, to investigate the physical and chemical properties, as well as star formation activities taking place therein. Our radio continuum and molecular line data were obtained from the Sydney University Molonglo Sky Survey (SUMSS), Atacama Pathfinder Experiment Te…
Exploring the multiphase medium in MKW 08: from the central active galaxy up to cluster scales
Ercan, E. N.; Bourdin, H.; Gaspari, M. +3 more
Context. The study of the brightest cluster galaxy (BCG) coronae embedded in noncool core (NCC) galaxy clusters is crucial to understand the BCG's role in galaxy cluster evolution as well as the activation of the self-regulated cooling and heating mechanism in the central regions of galaxy clusters.
Aims: We explore the X-ray properties of th…