Search Publications
Kinematics of OB Associations and the First Data from the Gaia Satellite
Dambis, A. K.; Mel'nik, A. M.
The first data release from the Gaia mission (Gaia DR1) is used to study kinematics of OB associations. The mean velocity dispersion in 18 OB associations containing at least 10 stars with proper motions from the TGAS catalog is 3.9 km/s. The contribution of binary systems to the velocity dispersions in OB associations is, on average, 1.2 km/s. Ex…
The Current System of Dipolarizing Flux Bundles and Their Role as Wedgelets in the Substorm Current Wedge
Runov, A.; Angelopoulos, V.; Yao, Zhonghua +3 more
Swift UVOT grism observations of nearby Type Ia supernovae - I. Observations and data reduction
Filippenko, A. V.; Foley, R. J.; Kuin, N. P. M. +1 more
Ultraviolet (UV) observations of Type Ia supernovae (SNe Ia) are useful tools for understanding progenitor systems and explosion physics. In particular, UV spectra of SNe Ia, which probe the outermost layers, are strongly affected by the progenitor metallicity. In this work, we present 120 Neil Gehrels Swift Observatory UV spectra of 39 nearby SNe…
Online characterization of planetary surfaces: PlanetServer, an open-source analysis and visualization tool
Rossi, A. P.; Marco Figuera, R.; Pham Huu, B. +3 more
The lack of open-source tools for hyperspectral data visualization and analysis creates a demand for new tools. In this paper we present the new PlanetServer, a set of tools comprising a web Geographic Information System (GIS) and a recently developed Python Application Programming Interface (API) capable of visualizing and analyzing a wide variet…
Flare Energy Release at the Magnetic Field Polarity Inversion Line during the M1.2 Solar Flare of 2015 March 15. I. Onset of Plasma Heating and Electron Acceleration
Zimovets, I. V.; Meshalkina, N. S.; Sharykin, I. N. +1 more
We present the study of the SOL2015-03-15 M1.2 flare, revealing acceleration of electrons and plasma heating in the sheared twisted magnetic structure at the polarity inversion line (PIL). The purpose is to make an analysis of nonthermal electron dynamics and plasma heating in the highly stressed magnetic loops interacting at the PIL by using X-ra…
Ring-type structures in the Planck map of the CMB
An, Daniel; Meissner, Krzysztof A.; Nurowski, Paweł
We present the results of the quest for ring-type structures on the maps observed by the Planck satellite. The results show that the vicinity of one radius (γ = 0.14 rad) of the rings is distinguished. Twisting the circles into deformed ellipses gives a pronounced drop of significance with the increase of twisting; however, this behaviour is also …
Influence of Earth-directed Coronal Mass Ejections on the Sun’s Shadow Observed by the Tibet-III Air Shower Array
Zhang, Yi; Yang, Z.; Liu, C. +79 more
We examine the possible influence of Earth-directed coronal mass ejections (ECMEs) on the Sun’s shadow in the 3 TeV cosmic-ray intensity observed by the Tibet-III air shower (AS) array. We confirm a clear solar-cycle variation of the intensity deficit in the Sun’s shadow during ten years between 2000 and 2009. This solar-cycle variation is overall…
Cassini RPWS Dust Observation Near the Janus/Epimetheus Orbit
Gurnett, D. A.; Persoon, A. M.; Hospodarsky, G. B. +7 more
During the Ring Grazing orbits near the end of Cassini mission, the spacecraft crossed the equatorial plane near the orbit of Janus/Epimetheus ( 2.5 Rs). This region is populated with dust particles that can be detected by the Radio and Plasma Wave Science (RPWS) instrument via an electric field antenna signal. Analysis of the voltage waveforms re…
IGR J14257-6117, a magnetic accreting white dwarf with a very strong strong X-ray orbital modulation
Mukai, K.; de Martino, D.; Bernardini, F. +1 more
IGR J14257-6117 is an unclassified source in the hard X-ray catalogues. Optical follow-ups suggest it could be a Cataclysmic Variable (CV) of the magnetic type. We present the first high signal-to-noise (S/N) X-ray observation performed by XMM-Newton at 0.3-10 keV, complemented with 10-80 keV coverage by Swift/BAT, aimed at revealing the source na…
Infall and outflow motions towards a sample of massive star-forming regions from the RMS survey
Cunningham, N.; Lumsden, S. L.; Moore, T. J. T. +2 more
We present the results of an outflow and infall survey towards a distance-limited sample of 31 massive star-forming regions drawn from the Red MSX source (RMS) survey. The presence of young, active outflows is identified from SiO (8-7) emission and the infall dynamics are explored using HCO+/H13CO+ (4-3) emission. …