Search Publications
Study of a Coronal Mass Ejection with SOHO/UVCS and STEREO data
Susino, Roberto; Vourlidas, Angelos; Bemporad, Alessandro +1 more
We study the 3-D kinematics of a Coronal Mass Ejection (CME) using data acquired by the LASCO C2 and UVCS instruments on board SOHO, and the COR1 coronagraphs and EUVI telescopes on board STEREO. The event, which occurred on May 20, 2007, was a partial-halo CME associated with a prominence eruption. This is the first CME studied with UVCS data tha…
Evidences to the pulse like origin of double spicules based on Hinode/SOT observations
Ebadi, H.
We analyze the time series of Hα line obtained from Hinode/SOT on the solar limb. The wavelet analysis shows that there are nice correlations between dynamical properties of the two parts of a double spicule. The dominant periods for height variations are estimated ∼90 and ∼180 s. The length of two parts of the spicule oscillates with the period o…
AKARI view of star formation in NGC 1313
Onaka, T.; Kaneda, H.; Suzuki, T.
Context. In the southwest region of NGC 1313, patchy star-forming regions are found. In the neighborhood, is a giant supershell with a diameter of 3.2 kpc. However, the direct association between star-forming regions and the giant supershell is still unclear.
Aims: We investigate the relation between the surface densities of the gas (Σga…
Propagation of normal and faster CMEs in the interplanetary medium
Shanmugaraju, A.; Umapathy, S.; Mujiber Rahman, A.
We have analyzed 101 Coronal Mass Ejection (CME) events and their associated interplanetary CMEs (ICMEs) and interplanetary (IP) shocks observed during the period 1997-2005 from the list given by Mujiber Rahman et al. (2012). The aim of the present work is to correlate the interplanetary parameters such as, the speeds of IP shocks and ICMEs, CME t…
Bright X-ray galaxies in SDSS filaments
Tugay, A. V.
Eighteen bright X-ray emitting galaxies were found in nearby filaments within the SDSS region. Basic X-ray spectral parameters were estimated for these galaxies using a power law model with photoelectric absorption. A close pair of X-ray galaxies was found.
Determination of the Ortho to Para Ratio of H2Cl+ and H2O+ from Submillimeter Observations
Kramer, Carsten; Le Petit, Franck; Godard, Benjamin +9 more
The opening of the submillimeter sky with the Herschel Space Observatory has led to the detection of new interstellar molecular ions, H2O+, H2Cl+, and HCl+, which are important intermediates in the synthesis of water vapor and hydrogen chloride. In this paper, we report new observations of H2O+ and H2Cl+ performed with both Herschel and ground-bas…
The XMM Cluster Survey: Present status and latest results
Miller, C. J.; Romer, A. K.; Mehrtens, N. +11 more
The XMM Cluster Survey (XCS) is a serendipitous search for galaxy clusters using all publicly available data in the XMM-Newton Science Archive. Our recent first data release (XCS-DR1) contains 503 optically confirmed groups and clusters, among which 256 new to the literature and 357 whose X-ray emission was detected for the first time. We discuss …
Generation of Pi2 pulsations by intermittent earthward propagating dipolarization fronts: An MHD case study
El-Alaoui, M.; Walker, R. J.; Goldstein, M. L. +3 more
Using a global magnetohydrodynamic (MHD) simulation of the magnetosphere during a disturbed interval on 14 September 2004, we have investigated fluctuations in plasma properties of the magnetotail in the Pi2 range and their relationship to dipolarization fronts (DFs). Results from the MHD simulation indicate that this event is a very active interv…
INTEGRAL observations of Scorpius X-1: evidence for Comptonization up to 200 keV
Maiolino, T.; Braga, J.; D'Amico, F.
We have analyzed a long-term database for Sco X-1 obtained with the telescope IBIS onboard the INTEGRAL satellite in order to study the hard X-ray behavior of Sco X-1 from 20 up to 200 keV. Besides the data used for producing of the INTEGRAL catalog of sources, this is the longest (412 ks) database of IBIS on Sco X-1 up to date. The production of …
Exploring the Diffuse X-ray Emission of Supernova Remnant Kesteven 69 with XMM-Newton
Hui, Chung Yue; Seo, Kyoung-Ae
We have investigated the X-ray emission from the shock-heated plasma of the Galactic supernova remnant Kesteven 69 with XMM-Newton. Assuming the plasma is at collisional ionization equilibrium, a plasma temperature and a column absorption are found to be kT ~ 0.62 keV and NH ~ 2.85 ×10^22 cm-2 respectively by imaging spectroscopy. Together with th…