Search Publications
Analysis of the first coronagraphic multi-band observations of a sungrazing comet
Heinzel, P.; Sasso, C.; Romoli, M. +35 more
Context. Between 24 and 25 December 2021 a sungrazing comet (SOHO-4341) approached the Sun, being observed by "classical" visible light (VL) coronagraphs on board the SOHO and STEREO missions, and also by the innovative Metis coronagraph on board the ESA-NASA Solar Orbiter mission in the VL and ultraviolet (UV H I Lyman-α) band.
Aims: We show…
Combination of MRO SHARAD and deep-learning-based DTM to search for subsurface features in Oxia Planum, Mars
Tao, Yu; Muller, Jan-Peter; Xiong, Siting +3 more
Context. Oxia Planum is a mid-latitude region on Mars that attracts a great amount of interest worldwide. An orbiting radar provides an effective way to probe the Martian subsurface and detect buried layers or geomorphological features. The Shallow radar orbital radar system on board the NASA Mars reconnaissance orbiter transmits pulsed signals to…
Investigation into the reflection properties of the neutron star low-mass X-ray binary 4U 1636-53
Wang, H. G.; García, F.; Zhang, G. B. +1 more
We present the spectroscopy of the neutron star low-mass X-ray binary 4U 1636-53 using six simultaneous XMM-Newton and Rossi X-ray Timing Explorer observations. We applied different self-consistent reflection models to explore the features when the disk is illuminated by either the corona or the neutron star surface. We found that the spectra coul…
Infrared view of the multiphase ISM in NGC 253. II. Modelling the ionised and neutral atomic gas
Lebouteiller, Vianney; Ramambason, Lise; Madden, Suzanne C. +9 more
Context. Multi-wavelength studies of galaxies and galactic nuclei allow us to build a relatively more complete picture of the interstellar medium (ISM), especially in the dusty regions of starburst galaxies. An understanding of the physical processes in nearby galaxies can assist in the study of more distant sources at higher redshifts that cannot…
Far-infrared line emission from the outer Galaxy cluster Gy 3-7 with SOFIA/FIFI-LS: Physical conditions and UV fields
König, C.; Menten, K. M.; Karska, A. +13 more
Context. Far-infrared (FIR) line emission provides key information about the gas cooling and heating due to shocks and UV radiation associated with the early stages of star formation. Gas cooling via FIR lines might, however, depend on metallicity.
Aims: We aim to quantify the FIR line emission and determine the spatial distribution of the CO…
Gaia data processing. SEAPipe: The source environment analysis pipeline
Harrison, D. L.; Evans, D. W.; van Leeuwen, F. +3 more
Aims: Our goal is to describe two potential options for the Source Environment Analysis pipeline (SEAPipe) for the Gaia mission. This pipeline will enable the discovery of sources that are new to Gaia, in the sense that they were not found by the on-board detection algorithm. These additional sources (secondaries) are discoverable in the vici…
Understanding the radio emission from ϵ Eridani
Rodríguez, Luis F.; Lizano, Susana; Cantó, Jorge +1 more
Some solar-type stars are known to present faint, time-variable radio continuum emission whose nature is not clearly established. We report on Jansky Very Large Array observations of the nearby star ϵ Eridani at 10.0 and 33.0 GHz. We find that this star has flux density variations on scales down to days, hours, and minutes. On 2020 April 15 it exh…
Parametric study of the kinematic evolution of coronal mass ejection shock waves and their relation to flaring activity
Kouloumvakos, Athanasios; Rouillard, Alexis P.; Warmuth, Alexander +2 more
Context. Coronal and interplanetary shock waves produced by coronal mass ejections (CMEs) are major drivers of space-weather phenomena, inducing major changes in the heliospheric radiation environment and directly perturbing the near-Earth environment, including its magnetosphere. A better understanding of how these shock waves evolve from the cor…
Variations in the intermediate wind region of the blue supergiant 55 Cygni
Kraus, M.; Granada, A.; Arias, M. L. +6 more
Context. The quantitative near-infrared (NIR) spectroscopic synthesis is an important technique for determining wind properties of massive stars. The Brα line is an excellent mass-loss tracer and provides valuable information on the physical conditions of intermediate-wind regions. The knowledge of the wind properties gained by studying the NIR li…
2021 occultations and transits of Linus orbiting (22) Kalliope. I. Polygonal and cliptracing algorithms
Carry, B.; Jehin, E.; de Wit, J. +10 more
Aims: The satellite Linus orbiting the main-belt asteroid (22) Kalliope exhibited mutual occultation and transit events in late 2021. A photometric campaign was organised and observations were undertaken by the TRAPPIST-South, SPECULOOS-Artemis, OWL-Net, and BOAO telescopes, with the goal to further constrain dynamical and photometric models …