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Optical performance of the Metis coronagraph on the Solar Orbiter ESA mission
Susino, Roberto; Antonucci, Ester; Fineschi, Silvano +19 more
The Metis coronagraph aboard the Solar Orbiter ESA spacecraft is expected to provide new insights into the solar dynamics. In detail, it is designed to address three main questions: the energy deposition mechanism at the poles (where the fast wind is originated), the source of the slow wind at lower altitude, and how the global corona evolves, in …
Search for new variable stars in the northern sky
Tautvaišienė, G.; Drazdauskas, A.; Mikolaitis, Š. +5 more
With the aim to find and characterize new variable stars, we obtained 24 470 CCD images in 13 fields of 0.4 square degrees with a 35/51 cm Maksutov-type semi-robotic telescope at the Molėtai Astronomical Observatory of Vilnius University. From photometric time series of 3604 stars analysed, we found 11 periodic variable stars and 70 slowly varying…
Surface Photometry of Proplyds in the Vicinity of θ 1 Ori C
Ismailov, N. Z.; Mamedkhanova, G. B.
Results of studies of the surface-brightness distributions of a group of young stellar objects located within 16″ of the star θ 1 Ori C are presented. Isophotes around each proplyd are constructed using violet, red, and near-infrared images. No regularity in the sizes of the diametral cross sections of the proplyds in the various photom…
Energetic Electron Patterns in the New SLS5 Longitude System
Mitchell, D. G.; Carbary, J. F.; Ye, Shengyi
Energetic electron (110-300 keV) fluxes collected during the entire 13-year Cassini mission are organized in the new Saturn longitude system (SLS5). This system is based on Saturn radio emissions, varies slowly in time and has a north and a south branch. When the fluxes are organized in SLS5 longitudes and magnetodisk coordinates, they display an …
High-mass Star Formation towards the southern infrared Bubble S10
Vig, S.; Ghosh, S. K.; Ishwara-Chandra, C. H. +2 more
We present a multi-wavelength analysis of the southern infrared bubble S10. Radio continuum emission is detected towards the bubble at 610 and 1280 MHz, and the bubble is estimated to be powered by massive stars of spectral type B0.5 - B0. A Class I/II type source, with an estimated mass of 6.2 Msol, lies 7'' from the radio peak. Six massive clump…
Size Scaling of Clump Instabilities in Turbulent, Feedback-regulated Disks
Glazebrook, Karl; Fisher, Deanne B.; Obreschkow, Danail +5 more
We explore the scaling between the size of star-forming clumps and rotational support in massively star-forming galactic disks. The analysis relies on simulations of a clumpy galaxy at z = 2 and the observed DYnamics of Newly Assembled Massive Objects (DYNAMO) sample of rare clumpy analogs at z ≈ 0.1 to test a predictive clump size scaling propose…
Silicate features in the circumstellar envelopes of the Class I binary driving source of HH 250
Comerón, F.; Merín, B.; Reipurth, B. +1 more
Context. The silicate feature near 10 µm is one of the main tools available to study the mineralogy of circumstellar disks and envelopes, providing information on the thermal processing, growth, location, and circulation of dust grains.
Aims: We investigate the silicate feature of the two Class I components of HH 250-IRS, a resolved bin…
Publisher Correction: Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter
Montmessin, Franck; Belyaev, Denis A.; Fedorova, Anna A. +65 more
The surname of author Cathy Quantin-Nataf was misspelled `Quantin-Nata' , authors Ehouarn Millour and Roland Young were missing from the ACS Science Team list, and minor changes have been made to the author and affiliation lists; see accompanying Amendment. These errors have been corrected online.
Catalogue of Visual Binaries in Gaia DR2
Kovaleva, D. A.; Sapozhnikov, S. A.; Malkov, O. Y.
We use Gaia DR2 data to construct a catalogue of visual binaries between 10 pc and 100 pc distance from the Sun. Based on data on positions and parallaxes, we have compiled a list of binary candidates containing all pairs of stars positioned within 1 parsec to one another. We have developed an algorithm involving the separation of sky into smaller…
Astrometric reduction of Cassini ISS images of Helene
Peng, Qingyu; Wang, Na; Li, Zhan +3 more