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Category/Subcategory: Natural Sciences/Astronomy

Observation of magnetic reconnection around a 3D null point

Author: Paolo Romano
We describe high-resolution observations of a GOES B-class flare observed at the Dunn Solar Telescope with IBIS and ROSA instruments. The flare was characterized by a circular ribbon at chromospheric level and was interpreted as a ... more

Views: 36

Simulation of the small-scale magnetism in main sequence stellar atmospheres

Author: Oskar Steiner
From observations of the Sun, we know of the existence of a small-scale magnetism in the form of photospheric magnetic flux concentrations of granular and sub-granular scales. This small-scale magnetic structur has consequences ... more

Views: 72

Observational needs for understanding solar magnetic activity and the formation of large-­scale transient events

Author: Lidia van Driel-Gesztelyi
The temperature in the solar atmosphere ranges over three orders of magnitude from the photosphere to the corona, which extends up to four during periods of transient activity. Consequently, the wavelengths we can observe certain ... more

Views: 290

Exceptions to the rule: the X-flares of AR 2192 lacking coronal mass ejections

Author: Manuela Temmer
The unusually large NOAA active region (AR) 2192, observed in October and November 2014, was outstanding in its productivity of major flares (GOES class M5 and larger). However, none of the X-flares was associated to a coronal mas ... more

Views: 505

The Gas Survey of HESS J1614-518 and HESS J1616-508 using the Mopra Telescope

Author: Stephanie Pointon
The HESS sources HESS J1614-518 and HESS J1616-508 have yet to be associated with any potential accelerator such as supernova remnants, pulsar wind nebulae, Wolf-Rayet stars or stellar clusters. We use the recently available Mopra ... more

Views: 303

The Solar Physics Research Integrated Network Group – SPRING

Author: Markus Roth
SPRING is a project to develop a geographically distributed network of instrumentation to obtain synoptic solar observations. Building on the demonstrated success of networks to provide nearly-continuous long-term data for heliose ... more

Views: 367

Spectral Inversion of the Halpha and Ca II 8542 A Lines Observed by SST/CRISP in Chromospheric Jet

Author: Julius Koza
We present results of spectral inversion of the Halpha and Ca II 8542 A lines observed by the imaging spectropolarimeter CRISP at the Swedish 1-m Solar Telescope in chromospheric jet identified in the quiet-Sun atmosphere. The inv ... more

Views: 78

Observations of the Inner Milky Way by the Fermi Large Area Telescope

Author: Michael Burton
Observations of the Inner Milky Way by the Fermi Large Area Telescope

Views: 237

Flares, oscillations and p-modes

Author: Frederic Baudin
Flares have been suspected to excite solar p-modes since the 1970s. More recently, Karoff & Kjeldsen (2008) investigated flare excitation of global oscillations while Maurya et al. (2009, 2014) did a local analysis (ring diagrams) ... more

Views: 255