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Longitude dependences of energetic H+ and O+ at Saturn
Krimigis, S. M.; Mitchell, D. G.; Carbary, J. F. +2 more
The charge-energy-mass spectrometer instrument in the Cassini spacecraft measured differential fluxes of protons (2.8-236 keV) and oxygen ions (8.8-236 keV) from July 2004 to August 2007. The fluxes were bin-averaged in Saturn longitude system (SLS) longitude within ±5 RS of the equator and between 8 and 12 RS in radial dista…
Computer modelling of a penetrator thermal sensor
Kargl, G.; Hagermann, A.; Green, S. F. +5 more
The Philae lander is part of the Rosetta mission to investigate comet 67P/Churyumov-Gerasimenko. It will use a harpoon like device to anchor itself onto the surface. The anchor will perhaps reach depths of 1-2 m. In the anchor is a temperature sensor that will measure the boundary temperature as part of the MUPUS experiment. As the anchor attains …
Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions
Owen, C. J.; Li, C.; Dai, Y. +2 more
A statistical survey of 26 major electron events during the period 2002 February through the end of solar cycle 23 is presented. We have obtained electron solar onset times and the peak flux spectra for each event by fitting to a power-law spectrum truncated by an exponential high-energy tail, i.e., f(E) ∼ E^{-δ}e^{-E/E_{0}}. We also derived the c…
Radiative and magnetic properties of solar active regions. II. Spatially resolved analysis of O V 62.97 nm transition region emission
Fludra, A.; Warren, H.
Context. Global relationships between the photospheric magnetic flux and the extreme ultraviolet emission integrated over active region area have been studied in a previous paper by Fludra & Ireland (2008, A&A, 483, 609). Spatially integrated EUV line intensities are tightly correlated with the total unsigned magnetic flux, and yet these g…
Some Peculiarities of Intensity Oscillations in Ca II Lines under Coronal Holes
Teplitskaya, R. B.; Turova, I. P.; Ozhogina, O. A.
Observations of the central intensity of the Ca II K and 849.8 nm lines are used to derive the ratios of the oscillation power in the frequency ranges of the "five-minute" (W5) and "three-minute" (W3) oscillations. It is shown that at high significance level ratios, (W5/W3) >1 at coronal hole bases, a…
Evidence of wave harmonics in a brightened magnetic network observed from Hinode/EIS
Srivastava, A. K.
We study intensity oscillations in the upper chromosphere to search acoustic wave harmonics in a low-atmospheric solar cavity associated with a brightened magnetic network near the south pole of the Sun. We use a wavelet tool to produce power spectrum of He II 256.32 Å intensity oscillation as observed by EUV Imaging Spectrometer (EIS) onboard Hin…
Observations and Analyses of the Eccentric Orbit Eclipsing Binary HP Draconis
Oblak, E.; Milone, E. F.; Kurpińska-Winiarska, M.
We present results of an analysis of all available data of the double-lined spectroscopic and eclipsing binary HP Draconis. The analyses make use of unpublished radial velocity (RV) and extensive photoelectric photometry data as well as published Hipparcos photometric observations and RV data from Asiago Observatory. The system is eccentric and th…
The catalog of variable sources detected by INTEGRAL. I. Catalog and techniques
Eckert, D.; Savchenko, V.; Produit, N. +3 more
Context. During its 6 years of operation, INTEGRAL/ISGRI has detected more than 500 sources. Many of these sources are variable. Taking into account that nearly half of INTEGRAL/ISGRI sources are new and many of them remain unidentified, the variability properties of the sources can provide additional constraints to help us to classify and identif…
Reflectance spectra of Titan tholin between 7000 and 10 cm-1. Interpretation of Cassini/CIRS observation of Saturn's satellite Phoebe
Barucci, M. A.; Dotto, E.; Brucato, J. R. +3 more
Context. Laboratory experiments provide a great support to astronomical studies in that they are the most suited technique to reproduce, model and interpret the observational data.
Aims: We investigate the spectroscopic properties of particulate and flat slab of tholin samples in a wide MIR and FIR spectral range at cryogenic temperature to c…
Variations in the X-ray eclipse transitions of Cen X-3
Paul, Biswajit; Devasia, Jincy; James, Marykutty +1 more
We report here an investigation of the X-ray eclipse transitions of the high mass X-ray binary pulsar Cen X-3 in different intensity states. The long term light curve of Cen X-3 obtained with RXTE-ASM spanning more than 5000d shows strong aperiodic flux variations with low and high states. We have investigated the eclipse transitions of Cen X-3 in…