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Galactic astronomy and small telescopes
Zwitter, T.
The second data release of ESA's Gaia satellite (Gaia DR2) revolutionised astronomy by providing accurate distances, proper motions, apparent magnitudes, and in many cases temperatures and radial velocities for an unprecedented number of stars. These new results, which are freely available, need to be considered in virtually any stellar research p…
Driving Gaia Science from the ESA Archive: DR2 to DR3
Mora, A.; Bakker, J.; de Teodoro, P. +11 more
Released 25th April, Gaia DR2 hosted in the ESA Gaia archive is leading a paradigm shift in the way astronomers access and process astronomical data in ESA archives.
An unprecedented active community of thousands of scientists is making use of the latest IVOA protocols and services (TAP, DataLink) in this archive, benefitting from remote exec…Impact of galactic interactions on the evolution of the far-infrared-radio correlation
Pavlović; , M.; Prodanović +1 more
A strong correlation has been known to exist between the far-infrared (FIR) and radio emission of star-forming galaxies. Observations have shown that, although scatter is present, this correlation holds over a range of redshifts and does not evolve. However, there have been a number of more recent observations, especially in higher redshift survey…
Effect of the Surface Roughness of Icy Grains on Molecular Oxygen Chemistry in Molecular Clouds
Gunell, H.; De Keyser, J.; Mousis, O. +6 more
Molecular cloud and protosolar nebula chemistry involves a strong interaction between the gas phase and the surface of icy grains. The exchanges between the gas phase and the solid phase depend not only on the adsorption and desorption rates but also on the geometry of the surface of the grains. Indeed, for sufficient levels of surface roughness, …
Reprocessing All the XMM-Newton Scientific Data: A Challenge for the Pipeline Processing System
Rodriguez-Pascual, Pedro; Perea-Calderón, José Vicente; Gabriel, Carlos
2019 will mark the 20-year anniversary of the XMM-Newton Mission. So far, the mission has successfully completed a total of around 14000 pointing observations, and it is expected to continue for many more years, producing a huge number of high-quality science data products.
Data processing of those observations is carried out by the XMM-Newto…Northern Galactic Molecular Cloud Clumps in Hi-GAL: Clump and Star Formation within Clouds
Rosolowsky, Erik; Zetterlund, Erika; Glenn, Jason
We investigate how the properties of Galactic giant molecular clouds (GMCs) and their denser substructures (clumps) correlate with the local star formation rate (SFR). We trace clouds using the 12CO(3-2) transition, as observed by the CO High Resolution Survey. We identify their constituent clumps using thermal dust emission, as observe…
Optical alignment of the Solar Orbiter EUI flight instrument
Auchère, F.; Jacques, L.; Schühle, U. +12 more
The Extreme Ultraviolet Imager (EUI) instrument for the Solar Orbiter mission will image the solar corona in the extreme ultraviolet (17.1 nm and 30.4 nm) and in the vacuum ultraviolet (121.6 nm). It is composed of three channels, each one containing a telescope. Two of these channels are high resolution imagers (HRI) at respectively 17.1 nm (HRI-…
Seasonal change of CH4/H2 ratio in the atmosphere of Uranus
Tu, Cui; Wang, Cong; Hu, Xiong
Uranus is mainly composed of elements heavier than hydrogen and helium, such as C, S, even though very little information about these elements has been detected. Methane is one of the most important component of the atmosphere of Uranus. Analysis of the full-disk spectra of Uranus, as observed by the Xinglong 2.16m telescope with BFOSC (Beijing-Fa…
New Carbon Stars Confirmed in the Digitized First Byurakan Survey Database
Gigoyan, K. K.; Gigoyan, K. S.; Kostandyan, G. R. +2 more
Refined proper motions of some high-velocity stars
Dambis, A. K.; Rastorguev, A. S.; Zhuiko, S. V.
We improve the Gaia DR2 proper motions of nine high-velocity stars with the highest proper-motion errors. We reduce the transversal-velocity errors for our stars from to 1.5-746 km/s. We combine our refined proper motions with published radial-velocity and distance data to compute the orbits of these stars in terms of the axisymmetric potential mo…