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Type I X-ray Bursts Detected by the JEM-X Telescope Onboard the INTEGRAL Observatory in 2003-2015
Grebenev, S. A.; Mereminskiy, I. A.; Chelovekov, I. V. +1 more
We present the results of our analysis of the JEM-X/INTEGRAL data obtained from January 2003 to January 2015 aimed at searching for type I X-ray bursts from known and new bursters. Such bursts are caused by thermonuclear explosions on the surface of a neutron star. We have searched for bursts in the records of the count rate of the JEM-X detectors…
Follow-up observations for the Asteroid Catalog using AKARI Spectroscopic Observations
Hasegawa, Sunao; Usui, Fumihiko; Yanagisawa, Kenshi +1 more
In the 1-2.5 µm range, spectroscopic observations are made on the AcuA-spec asteroids, the spectra of which were obtained in a continuous covered mode between 2.5-5.0 µm by AKARI. Based on the Bus-DeMeo taxonomy (DeMeo et al. 2009, Icarus, 202, 160), all the AcuA-spec asteroids are classified, using both published and our observational…
Gas kinematics in the H II regions G351.69-1.15 and G351.63-1.25
Vig, S.; Ghosh, S. K.; Veena, V. S. +2 more
We probe the structure and kinematics of two neighbouring H II regions identified as cometary and bipolar, using radio recombination lines (RRLs). The H172α RRLs from these H II regions: G351.69-1.15 and G351.63-1.25, are mapped using Giant Metrewave Radio Telescope, India. We also detect carbon RRLs C172α towards both these regions. The hydrogen …
Star Formation in the Cluster Merger DLSCL J0916.2+2953
Dawson, W. A.; Lemaux, B. C.; Wittman, D. +3 more
We investigate star formation in DLSCL J0916.2+2953, a dissociative merger of two clusters at z = 0.53 that has progressed {1.1}-0.4+1.3 Gyr since the first pass-through. We attempt to reveal the effects a collision may have had on the evolution of the cluster galaxies by tracing their star formation history. We probe current…
Stagnant Shells in the Vicinity of the Dusty Wolf-Rayet-OB Binary WR 112
Moffat, A. F. J.; Schödel, R.; Ressler, M. E. +3 more
We present high spatial resolution mid-infrared images of the nebula around the late-type carbon-rich Wolf-Rayet (WC)-OB binary system WR 112 taken by the recently upgraded VLT spectrometer and imager for the mid-infrared (VISIR) with the PAH1, Ne ii_2, and Q3 filters. The observations reveal a morphology resembling a series of arc-like filaments …
XMM-Newton observation of the ultraluminous quasar SDSS J010013.02+280225.8 at redshift 6.326
Ghisellini, G.; Fan, Xiaohui; Fabian, A. C. +7 more
A brief Chandra observation of the ultraluminous quasar SDSS J010013.02+280225.8 at redshift 6.326 showed it to be a relatively bright, soft X-ray source with a count rate of about 1 count ks-1. In this article, we present results for the quasar from a 65-ks XMM-Newton observation, which constrains its spectral shape well. The quasar is…
Tangential deflection and formation of counterstreaming flows at the impact of a plasma jet on a tangential discontinuity
Echim, M.; Voitcu, G.
In this letter we report three-dimensional particle-in-cell simulations of the interaction between a nonpenetrable magnetosheath jet and the magnetopause, for northward interplanetary magnetic field. The magnetopause is modeled as a tangential discontinuity with no magnetic shear. We investigate the deflection of the plasma jet in the direction ta…
Roche tomography of cataclysmic variables - VIII. The irradiated and spotted dwarf nova, SS Cygni
Szkody, P.; Hebb, L.; Hill, C. A. +1 more
We present the results of our spectroscopic study of the dwarf nova SS Cyg, using Roche tomography to map the stellar surface and derive the system parameters. Given that this technique takes into account the inhomogeneous brightness distribution on the surface of the secondary star, our derived parameters are (in principle) the most robust yet fo…
Transit-timing variations in the system Kepler-410Ab
Gajdoš, Pavol; Vaňko, Martin; Parimucha, Štefan +1 more
We present a new analysis of the transit timing variations displayed by the extrasolar planet Kepler-410Ab. We obtained and improved the orbital and physical parameters for the planet and analysed 70 transit times obtained by the Kepler satellite. In our analysis of the O-C diagram (observed minus calculated), we assumed that the observed changes …
Connecting HL Tau to the observed exoplanet sample
Tamayo, Daniel; Murray, Norman; Petrovich, Cristobal +2 more
The Atacama Large Millimeter/submilimeter Array (ALMA) recently revealed a set of nearly concentric gaps in the protoplanetary disc surrounding the young star HL Tauri (HL Tau). If these are carved by forming gas giants, this provides the first set of orbital initial conditions for planets as they emerge from their birth discs. Using N-body integr…