Search Publications
Silicon isotopic abundance toward evolved stars and its application for presolar grains
de Gregorio-Monsalvo, I.; Testi, L.; Gray, M. D. +8 more
Aims: Galactic chemical evolution (GCE) is important for understanding the composition of the present-day interstellar medium (ISM) and of our solar system. In this paper, we aim to track the GCE by using the 29Si/30Si ratios in evolved stars and tentatively relate this to presolar grain composition.
Methods: We use…
Interstellar H2 toward HD 147888
Gnaciński, P.
The ultraviolet and far-ultraviolet spectra of
Hα Moreton waves observed on December 06, 2006. A 2D case study
Luoni, M. L.; Costa, A.; Francile, C. +1 more
Context. We present high temporal resolution observations of a Moreton wave event detected with the Hα Solar Telescope for Argentina (HASTA) in the Hα line 656.3 nm, on December 6, 2006.
Aims: The aim is to contribute to the discussion about the nature and triggering mechanisms of Moreton wave events.
Methods: We describe the HASTA teles…
Properties of sunspot penumbral grains observed with Hinode
Ichimoto, K.; Zhang, Y.
Context. Penumbral grains (PGs) are small-scale (subarcsec) bright features found in the bright penumbral filament in the outer parts of sunspots.
Aims: We aim to study properties of PGs at the blue continuum (4504 Å) and the G-band (4305 Å) by using simultaneous seeing free data obtained by Broadband Filter Imager (BFI) on board Hinode.
…
XMM-Newton observations of RR Telescopii: evidence for wind signatures and shocked gas emission
Selvelli, P.; González-Riestra, R.; Cassatella, A.
RR Telescopii is the prototype of the symbiotic novae class. Since its outburst in 1944, it has been slowly fading, and its emission-line spectrum has evolved significantly. In this paper we discuss XMM-Newton observations of RR Tel taken in April 2009. These are the first X-ray high-resolution spectra of this system, and they provide important in…
On the role of current dissipation in the energization of coronal bright points
Adamson, E.; Otto, A.; Büchner, J.
Aims: In the context of the contributions by DC dissipation to the energization of solar coronal X-ray and EUV bright points, we analyze the role of Joule heating in the formation of X-ray and EUV coronal bright points through current dissipation due to anomalous resistivity.
Methods: We utilized the improved resistive MHD simulation cod…
Resolving the molecular gas around the lensed quasar RXJ0911.4+0551
Kneib, J. -P.; Salomé, P.; Beelen, A. +5 more
We report on high angular resolution observations of the CO(7-6) line and millimeter continuum in the host galaxy of the gravitationally lensed (z ~ 2.8) quasar
Suzaku observations of the low surface brightness cluster A76
Böhringer, H.; Chon, G.; Ota, N. +2 more
Aims: We present the results of Suzaku observations of a nearby galaxy cluster,
Spectroscopy of diffuse light in dust clouds. Scattered light and the solar neighbourhood radiation field
Lehtinen, K.; Mattila, K.
Context. The optical surface brightness of dark nebulae is mainly due to scattering of integrated starlight by classical dust grains. It contains information on the impinging interstellar radiation field, cloud structure, and grain scattering properties. We have obtained spectra of the scattered light from 3500 to 9000 Å in two globules, the Thumb…
Supernova remnant G296.7-0.9 in X-rays
Becker, W.; Prinz, T.
Aims: We present a detailed study of the supernova remnant G296.7-0.9 in the 0.2-12 keV X-ray band.
Methods: Using data from XMM-Newton, we performed a spectro-imaging analysis of G296.7-0.9 in order to deduce the basic parameters of the remnant and search for evidence of a young neutron star associated with it.
Results: In X-rays t…