Search Publications
Detailed radio to soft γ-ray studies of the 2005 outburst of the new X-ray transient XTE J1818-245
D'Avanzo, P.; Campana, S.; Goldoni, P. +11 more
Context: XTE J1818-245 is an X-ray nova that experienced an outburst in 2005, as first seen by the <sl>RXTE</sl> satellite. The source was observed simultaneously at various wavelengths up to soft γ-rays with the <sl>INTEGRAL</sl> satellite, from 2005 February to September, during our <sl>INTEGRAL</sl> Target of…
The AGN nature of three INTEGRAL sources: IGR J18249-3243, IGR J19443+2117, and IGR J22292+6647
Masetti, N.; Gehrels, N.; Capitanio, F. +6 more
Context: The third INTEGRAL/IBIS survey has revealed several new hard X-ray sources, which are still unidentified or unclassified. To identify these sources, we need to find their counterparts at other wavelengths and then study their nature.
Aims: The aim of this work is to employ the capability of the X-ray telescope (XRT) onboard Swift to l…
Radial Velocity Search for Extrasolar Planets in Visual Binary Systems
Sato, Bun'ei; Itoh, Yoichi; Oasa, Yumiko +7 more
We searched for extrasolar planets in visual binary systems using precise Doppler-shift measurements taken over a period of 4 yr. Using the HIgh Dispersion Echelle Spectrograph (HIDES) equipped on the Okayama Astrophysical Observatory (OAO) 188cm reflector, we achieved a radial-velocity precision of about 10ms-1. We monitored both prima…
Comparative clustering analysis of variable stars in the Hipparcos, OGLE Large Magellanic Cloud, and CoRoT exoplanet databases
Sarro, L. M.; Aerts, C.; Debosscher, J. +1 more
Context: Discovery of new variability classes in large surveys using multivariate statistics techniques such as clustering, relies heavily on the correct understanding of the distribution of known classes as point processes in parameter space.
Aims: Our objective is to analyze the correspondence between the classical stellar variability types …
The change of magnetic inclination angles associated with the X3.4 flare on December 13, 2006
Jing, Ju; Wang, Haimin; Tan, Changyi +1 more
Recent studies showed a consistent pattern of changes in the sunspot structure associated with major flares: part of the peripheral penumbral regions vanishes during flares, and meanwhile, the umbral cores and/or inner penumbral regions are darkened. To understand the underlying physics of these observations, we compare the magnetic inclination an…
V3885 Sagittarius: A Comparison with a Range of Standard Model Accretion Disks
Szkody, Paula; Sion, Edward M.; Godon, Patrick +3 more
A \widetilde{χ}^2 analysis of standard model accretion disk synthetic spectrum fits to combined Far Ultraviolet Spectroscopic Explorer and Space Telescope Imaging Spectrograph spectra of V3885 Sagittarius, on an absolute flux basis, selects a model that accurately represents the observed spectral energy distribution. Calculation of the synthetic s…
Radio continuum and near-infrared study of the MGRO J2019+37 region
Luque-Escamilla, P. L.; Paredes, J. M.; Romero, G. E. +10 more
Context:
2XMMiJ225036.9+573154 - a new eclipsing AMHer binary discovered using XMM-Newton
Barclay, Thomas; Ramsay, Gavin; Hakala, Pasi +1 more
We report the discovery of an eclipsing polar, 2XMMiJ225036.9+573154, using XMM-Newton. It was discovered by searching the light curves in the 2XMMi catalogue for objects showing X-ray variability. Its X-ray light curve shows a total eclipse of the white dwarf by the secondary star every 174min. An extended pre-eclipse absorption dip is observed i…
Saturn: Composition and Chemistry
Fouchet, Thierry; Moses, Julianne I.; Conrath, Barney J.
The chapter reviews our current knowledge of the molecular, elemental, and isotopic composition and atmospheric chemistry in Saturn 's shallow atmosphere, i.e., between the cloud levels and the homopause. We do not restrict the review to Cassini 's results, as past and current ground-based or Earth-based observations are still fundamental to draw …
The coupling of winds, aerosols and chemistry in Titan's atmosphere
Lebonnois, Sebastien; Rannou, Pascal; Hourdin, Frederic