Search Publications
Solar Radio Burst Associated with the Falling Bright EUV Blob
Dudík, Jaroslav; Zemanová, Alena; Karlický, Marian +1 more
At the beginning of the 2015 November 4 flare, in the 1300-2000 MHz frequency range, we observed a very rare slow positively drifting burst. We searched for associated phenomena in simultaneous EUV observations made by IRIS, SDO/AIA, and Hinode/XRT, as well as in H α observations. We found that this radio burst was accompanied with the…
ExoMars Trace Gas Orbiter (TGO) Science Ground Segment (SGS)
Metcalfe, L.; Geiger, B.; Lim, T. +19 more
The ExoMars Trace Gas Orbiter (TGO) Science Ground Segment (SGS), comprised of payload Instrument Team, ESA and Russian operational centres, is responsible for planning the science operations of the TGO mission and for the generation and archiving of the scientific data products to levels meeting the scientific aims and criteria specified by the E…
Radial Velocity and Chemical Composition of Evolved Stars in the Open Clusters NGC 6940 and Tombaugh 5
D'Orazi, Valentina; Carraro, Giovanni; Baratella, Martina +1 more
We present and discuss medium resolution (R ∼ 13000), high signal-to-noise ({{S}}/{{N}}∼ 100), spectroscopic observations in the field of the open clusters NGC 6940 and Tombaugh 5. Spectra were recorded for seven candidate red giant stars in both clusters. For the latter, we present the very first chemical abundance analysis. We derive radial velo…
A review of Morlet wavelet analysis of radial profiles of Saturn's rings
Hedman, Matthew M.; Tiscareno, Matthew S.
Spiral waves propagating in Saturn's rings have wavelengths that vary with radial position within the disc. The best-quality observations of these waves have the form of radial profiles centred on a particular azimuth. In that context, the wavelength of a given spiral wave is seen to change substantially with position along the one-dimensional pro…
Dust in the outer layers of the Barnard 5 globule
Il'in, V. B.; Prokopjeva, M. S.; Efimov, Yu S. +2 more
We present the results of our UBVRI polarimetric observations of a dozen stars located close to the well-studied Bok globule Barnard 5 (B5), with several of the stars being seen through its outer layers (with AV up to ∼3 mag). Using recent astrometric, spectroscopic and photometric surveys, we estimate the distance, spectral class and v…
The Gemini/HST Galaxy Cluster Project: Redshift 0.2-1.0 Cluster Sample, X-Ray Data, and Optical Photometry Catalog
Jørgensen, Inger; Chiboucas, Kristin; Nielsen, Louise D. +2 more
The Gemini/HST Galaxy Cluster Project (GCP) covers 14 z = 0.2-1.0 clusters with X-ray luminosity of {L}500≥slant {10}44 {erg} {{{s}}}-1 in the 0.1-2.4 keV band. In this paper, we provide homogeneously calibrated X-ray luminosities, masses, and radii, and we present the complete catalog of the ground-based photometr…
Laboratory Analog of Heavy Jets Impacting a Denser Medium in Herbig-Haro (HH) Objects
Wang, C.; Zhang, J.; Zhao, G. +17 more
X-ray emissions in protostars play an important role in the chemistry of protostellar disks and in constraining the physics of jet formation. We have experimentally investigated the mechanism of X-ray emission in protostellar jets and modeled their interaction with the surrounding medium. The simulated supersonic jet is generated by intense laser …
Observation of eruptive events with the Siberian Radioheliograph
Fedotova, Anastasiya; Altyntsev, Alexander; Kochanov, Aleksey +2 more
We describe methods for monitoring eruption activity with the first phase of the multiwave Siberian Radioheliograph (SRH-48). We give examples of the recorded eruptive events: 1) rise of a prominence above the limb observed in the radio map sequence of April 24, 2017; 2) a jet recorded on August 2, 2017, whose cold matter screened a compact microw…
Dust in the eye of Andromeda
Smith, M. W. L.; Eales, S. A.; Marsh, K. A. +2 more
We present new Herschel-derived images of warm dust in the Andromeda galaxy, M31, with unprecedented spatial resolution (∼30 pc), column density accuracy, and constraints on the three-dimensional distributions of dust temperature and dust opacity index (hence grain size and composition), based on the new PPMAP Bayesian analysis procedure. We confi…
Sparse estimation of model-based diffuse thermal dust emission
Irfan, Melis O.; Bobin, Jérôme
Component separation for the Planck High Frequency Instrument (HFI) data is primarily concerned with the estimation of thermal dust emission, which requires the separation of thermal dust from the cosmic infrared background (CIB). For that purpose, current estimation methods rely on filtering techniques to decouple thermal dust emission from CIB a…