Search Publications
Properties of the 15 February 2011 Flare Seismic Sources
Green, L. M.; Zharkova, V. V.; Matthews, S. A. +1 more
The first near-side X-class flare of Solar Cycle 24 occurred in February 2011 (SOL2011-02-05T01:55) and produced a very strong seismic response in the photosphere. One sunquake was reported by Kosovichev (Astrophys. J. Lett.734, L15, 2011), followed by the discovery of a second sunquake by Zharkov, Green, Matthews et al. (Astrophys. J. Lett.741, L…
X-ray and radio observations of the magnetar Swift J1834.9-0846 and its dust-scattering halo
Tiengo, A.; Götz, D.; Mereghetti, S. +13 more
We present a long-term study of the 2011 outburst of the magnetar Swift J1834.9-0846 carried out using new Chandra observations, as well as all the available Swift, RXTE and XMM-Newton data. The last observation was performed on 2011 November 12, about 100 d after the onset of the bursting activity that had led to the discovery of the source on 20…
A coordinated optical and X-ray spectroscopic campaign on HD 179949: searching for planet-induced chromospheric and coronal activity
Moutou, C.; Donati, J. -F.; Scandariato, G. +10 more
Context.
Herschel limits on far-infrared emission from circumstellar dust around three nearby type Ia supernovae.
Amanullah, R.; Goobar, A.; Johansson, J.
We report upper limits on dust emission at far-infrared (IR) wavelengths from three nearby Type Ia supernovae: SNe 2011by, 2011fe and 2012cg. Observations were carried out at 70 and 160 µm with the Photodetector Array Camera and Spectrometer onboard the Herschel Space Observatory. None of the supernovae were detected in the far-IR, allowing …
The multiple spots of the Ganymede auroral footprint
Bagenal, F.; Bonfond, B.; Clarke, J. T. +5 more
The interaction between the moons and the magnetosphere of giant planets sometimes gives rise to auroral signatures in the planetary ionosphere, called the satellite footprints. So far, footprints have been detected for Io, Europa, Ganymede, and Enceladus. These footprints are usually seen as single spots. However, the Io footprint, the brightest …
Transport of cold ions from the polar ionosphere to the plasma sheet
Fränz, M.; Wei, Y.; Daly, P. W. +8 more
Ionospheric outflow is believed to be a significant contribution to the magnetospheric plasma population. Ions are extracted from the ionosphere and transported downtail by the large-scale convection motion driven by dayside reconnection. In this paper, we use a comprehensive data set of cold ion (total energy less than 70 eV) measurements combine…
Evolution of the Stratospheric Temperature and Chemical Composition over One Titanian Year
Coustenis, Athena; Teanby, N. A.; Flasar, F. M. +11 more
Since the Voyager 1 (V1) flyby in 1980, Titan's exploration from space and the ground has been ongoing for more than a full revolution of Saturn around the Sun (one Titanian year or 29.5 Earth years had elapsed in 2010 May). In this study, we search for temporal variations affecting Titan's atmospheric thermal and chemical structure within that ye…
Magnetic Flux of EUV Arcade and Dimming Regions as a Relevant Parameter for Early Diagnostics of Solar Eruptions - Sources of Non-recurrent Geomagnetic Storms and Forbush Decreases
Grechnev, V. V.; Chertok, I. M.; Belov, A. V. +1 more
This study aims at the early diagnostics of the geoeffectiveness of coronal mass ejections (CMEs) from quantitative parameters of the accompanying EUV dimming and arcade events. We study events of the 23th solar cycle, in which major non-recurrent geomagnetic storms (GMS) with Dst<−100 nT are sufficiently reliably identified with their solar so…
Polycyclic aromatic hydrocarbons in spatially resolved extragalactic star-forming complexes
Wiebe, D. S.; Boley, P. A.; Khramtsova, M. S. +1 more
The abundance of polycyclic aromatic hydrocarbons (PAHs) in low- and high-metallicity galaxies has been widely discussed since the time when detailed infrared data for extragalactic objects were first obtained. On the scales of entire galaxies, a smaller PAH abundance in lower metallicity galaxies is often observed. We study this relationship for …
The ALHAMBRA survey: reliable morphological catalogue of 22 051 early- and late-type galaxies
Cepa, J.; Infante, L.; Molino, A. +29 more
Advanced Large Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) is photometric survey designed to trace the cosmic evolution and cosmic variance. It covers a large area of ∼4 deg2 in eight fields, where seven fields overlap with other surveys, allowing us to have complementary data in other wavelengths. All observations wer…