Search Publications
Current Sheet Structures Observed by the TESIS EUV Telescope during a Flux Rope Eruption on the Sun
Reva, A. A.; Ulyanov, A. S.; Kuzin, S. V.
We use the TESIS EUV telescope to study the current sheet signatures observed during flux rope eruption. The special feature of the TESIS telescope was its ability to image the solar corona up to a distance of 2 {R}⊙ from the Sun’s center in the Fe 171 Å line. The Fe 171 Å line emission illuminates the magnetic field lines, and the TES…
The Cold Dust Content of the Oxygen-rich Supernova Remnant G292.0+1.8
Ghavamian, Parviz; Williams, Brian J.
We present far-infrared images of the Galactic oxygen-rich supernova remnant (SNR) G292.0+1.8, acquired with the PACS and SPIRE instruments of the Herschel Space Observatory. We find that the SNR shell is detected in the PACS blue (100 µm) band, but not in the red (160 µm) band, broadly consistent with results from AKARI observations. …
A Decameter Stationary Type IV Burst in Imaging Observations on 2014 September 6
Koval, Artem; Stanislavsky, Aleksander; Chen, Yao +3 more
First-of-its-kind radio imaging of a decameter solar stationary type IV radio burst has been presented in this paper. On 2014 September 6 the observations of type IV burst radio emission were carried out with the two-dimensional heliograph based on the Ukrainian T-shaped radio telescope (UTR-2), together with other telescope arrays. Starting at ∼0…
Multi-wavelength Study of HESS J1741-302
Kargaltsev, Oleg; Sonbas, Eda; Hare, Jeremy +2 more
We present the results of two Chandra X-ray Observatory (CXO) observations of TeV γ-ray source HESS J1741-302. We investigate whether there is any connection between HESS J1741-302 and the sources seen at lower energies. One of the brightest X-ray sources in the HESS J1741-302 field, CXOU J174112.1-302908, appears to be associated with a low-mass …
Thermal Characteristics and the Differential Emission Measure Distribution During a B8.3 Flare on 2009 July 4
Awasthi, Arun Kumar; Jain, Rajmal; Sylwester, Barbara +1 more
We investigate the evolution of the differential emission measure distribution (DEM[T]) in various phases of a B8.3 flare which occurred on 2009 July 04. We analyze the soft X-ray (SXR) emission in the 1.6-8.0 keV range, recorded collectively by the Solar Photometer in X-rays (SphinX; Polish) and the Solar X-ray Spectrometer (Indian) instruments. …
Inferring the Galactic Potential with GAIA and Friends: Synergies with Other Surveys
Sanderson, Robyn E.
In the coming decade, the Gaia satellite will precisely measure the positions and velocities of millions of stars in the Galactic halo, including stars in many tidal streams. These streams, the products of hierarchical accretion of satellite galaxies by the Milky Way (MW), can be used to infer the Galactic gravitational potential thanks to their i…
Dependence of Occurrence Rates of Solar Flares and Coronal Mass Ejections on the Solar Cycle Phase and the Importance of Large-scale Connectivity
Moon, Y. -J.; Nakariakov, V. M.; Lee, Kangjin
We investigate the dependence of the occurrence rates of major solar flares (M- and X-class) and front-side halo coronal mass ejections (FHCMEs), observed from 1996 to 2013, on the solar cycle (SC) phase for six active McIntosh sunspot group classes: Fkc, Ekc, Dkc, Fki, Eki, and Dki. We classify SC phases as follows: (1) ascending phase of SC 23 (…
Star-formation Activity in the Neighborhood of W-R 1503-160L Star in the Mid-infrared Bubble N46
Dewangan, L. K.; Ojha, D. K.; Zinchenko, I. +4 more
In order to investigate star-formation (SF) processes in extreme environments, we have carried out a multi-wavelength analysis of the mid-infrared bubble N46, which hosts a WN7 Wolf-Rayet (W-R) star. We have used 13CO line data to trace an expanding shell surrounding the W-R star containing about five condensations within the molecular …
Studying the Interstellar Medium and the Inner Region of NPS/LOOP 1 with Shadow Observations toward MBM36
Liu, W.; Galeazzi, M.; Ursino, E.
We analyzed data from a shadow observation of the high density molecular cloud MBM36 (l ∼ 4°, b ∼ 35°) with Suzaku. MBM36 is located in a region that emits relatively weakly in the 3/4 keV band compared to the surrounding North Polar Spur (NPS)/Loop 1 structure and the Galactic Bulge (GB). The contrast between high and low density targets in the M…
A Multi-instrument Analysis of a C4.1 Flare Occurring in a δ Sunspot
Guglielmino, S. L.; Romano, P.; Zuccarello, F. P. +5 more
We present an analysis of multi-instrument space- and ground-based observations relevant to a C4.1 solar flare that occurred in the active region (AR) NOAA 11267 on 2011 August 6. Solar Dynamics Observatory observations indicate that at the flare’s beginning, it was localized in the preceding sunspot of the AR, which exhibits a δ configuration. Al…