Search Publications
Oscillatory motions observed in eruptive filaments
Koutchmy, S.; Baudin, F.; Bocchialini, K. +2 more
Context. The origin of the variable component of the solar wind is of great intrinsic interest for heliophysics and spaceweather, e.g. the initiation of coronal mass ejections and the problem of mass loss of all stars. It is also related to the physics of coronal neutral sheets and streamers, which occur above lines of magnetic polarity reversal. …
XMM-Newton observations of the superbubble in N 158 in the LMC
Haberl, F.; Sasaki, M.; Breitschwerdt, D. +1 more
Aims: We study the diffuse X-ray emission observed in the field of view of the pulsar B 0540-69 in the Large Magellanic Cloud (LMC) by XMM-Newton. We wish to understand the nature of this soft diffuse emission, which coincides with the superbubble in the H ii region N 158, and improve our understanding of the evolution of superbubbles.
M…
A pan-chromatic view of the galaxy cluster XMMU J1230.3+1339 at z = 0.975. Observing the assembly of a massive system
Böhringer, H.; Pratt, G. W.; Rovilos, E. +16 more
Context. Observations of the formation and evolution of massive galaxy clusters and their matter components provide crucial constraints on cosmic structure formation, the thermal history of the intracluster medium (ICM), galaxy evolution, transformation processes, and gravitational and hydrodynamic interaction physics of the subcomponents.
Ai…
The EUV spectrum of the Sun: SOHO CDS NIS irradiances from 1998 until 2010
Andretta, V.; Del Zanna, G.
We present extreme-ultraviolet (EUV) irradiances of the Sun taken during the 1998-2010 period from the Solar and Heliospheric Observatory (SoHO) Coronal Diagnostic Spectrometer (CDS) Normal Incidence Spectrograph (NIS). They were obtained from NIS full-Sun radiance observations, and represent the first set of EUV spectral observations spanning a s…
Evolution of the dust coma in comet 67P/Churyumov-Gerasimenko before the 2009 perihelion
Vincent, J. -B.; Schulz, R.; Licandro, J. +5 more
Context. Comet 67P/Churyumov-Gerasimenko is the main target of ESA's Rosetta mission and will be encountered in May 2014. Because the spacecraft will orbit the comet nucleus before and after release of the lander Philae, it is necessary to know the conditions in the coma.
Aims: We study the dust environment, including the dust production rate…
On the origin of correlated X-ray/VHE emission from LS I +61 303
Paredes, J. M.; Zabalza, V.; Bosch-Ramon, V.
Context. The MAGIC collaboration recently reported correlated X-ray and very high-energy (VHE) gamma-ray emission from the gamma-ray binary LS I +61 303 during ~60% of one orbit. These observations suggest that the emission in these two bands has its origin in a single particle population.
Aims: We aim at improving our understanding of the so…
67P/Churyumov-Gerasimenko at large heliocentric distance
Agarwal, J.; Tubiana, C.; Ortiz, J. L. +3 more
Aims: The Jupiter family comet (JFC) 67P/Churyumov-Gerasimenko (67P/C-G) is the target of ESA's ROSETTA mission. Observational campaigns and theoretical investigations were performed to characterise 67P/C-G in terms of nucleus properties (e.g. size, surface colours, rotational period), gas and dust production, and plasma environment in prepar…
Implications for the structure of the relativistic jet from multiwavelength observations of NGC 6251
Gargano, F.; Giordano, F.; Giroletti, M. +8 more
NGC 6251 is a luminous radio galaxy ≈104 Mpc away that was detected significantly with the Fermi Gamma-ray Space Telescope, and before that with EGRET (onboard the Compton Gamma-ray Observatory). Different observational constraints favor a nuclear origin for the γ-ray emission. Here we present a study of the spectral energy distribution of the cor…
Abundances in planetary nebulae: NGC 1535, NGC 6629, He2-108, and Tc1
Pottasch, S. R.; Bernard-Salas, J.; Surendiranath, R.
Context. Models have been made of stars of a given mass that produce planetary nebulae that usually begin on the AGB (although they may begin earlier) and run to the white dwarf stage. While these models cover the so-called dredge-up phases when nuclear reactions occur and the newly formed products are brought to the surface, it is important to co…
Integral-field spectroscopy of (90482) Orcus-Vanth
Berthier, J.; Carry, B.; Hestroffer, D. +8 more
Aims: We seek to constrain the surface composition of the trans-Neptunian object (90482) Orcus and its small satellite Vanth, as well as their mass and density.
Methods: We acquired near-infrared spectra (1.4-2.4 µm) of (90482) Orcus and its companion Vanth using the adaptive-optics-fed integral-field spectrograph SINFONI mounted o…