Search Publications
Swift monitoring of the central X-ray source in RCW 103
de Luca, A.; Esposito, P.; Possenti, A. +3 more
The X-ray source 1E 161348-5055 lies at the centre of the 2-kyr-old supernova remnant RCW 103. Owing to its 24-ks modulation, orders-of-magnitude flux variability over a few months/years and lack of an obvious optical counterpart, 1E 161348-5055 defies assignment to any known class of X-ray sources. Starting from 2006 April, Swift observed 1E 1613…
Comparison Between Observation and Simulation of Magnetic Field Changes Associated with Flares
Jing, Ju; Wang, Haimin; Fan, Yuhong +1 more
It has been a long-standing question in solar physics how magnetic field structure changes with eruptive events (e.g., flares and coronal mass ejections). In this Letter, we present the eruption-associated changes in the magnetic inclination angle, the horizontal component of magnetic field vectors, and the Lorentz force. The analysis is based on …
Auroral hiss, electron beams and standing Alfvén wave currents near Saturn's moon Enceladus
Schippers, P.; Gurnett, D. A.; Persoon, A. M. +8 more
Observations from the Cassini spacecraft have shown that Saturn's small icy moon Enceladus ejects a plume of water vapor and small ice particles into Saturn's rapidly co-rotating magnetosphere. In this paper we show that the interaction of the moon with the magnetospheric plasma produces a number of electrodynamics effects that are remarkably simi…
Little variability of methane on Mars induced by adsorption in the regolith
Forget, F.; Lefèvre, F.; Gough, R. +1 more
The mechanisms that can induce short term variations of methane in the Martian atmosphere, and thus explain the observations currently available, are yet to be discovered. Seasonal exchange with the regolith, caused by reversible adsorption, is expected to induce both spatial and time variabilities without the need for additional sources and sinks…
Suzaku Observations of Metal Distributions in the Intracluster Medium of the Centaurus Cluster
Sato, Kosuke; Matsushita, Kyoko; Ota, Naomi +2 more
We report the first observations of metal distributions in the intracluster medium of the Centaurus cluster up to
Long-term variation in the thermosphere: TIMED/GUVI observations
Zhang, Y.; Paxton, Larry J.
Long-term changes in the thermospheric composition (O/N2 column density ratio) and exospheric temperature (Texo) have been examined. The data are obtained from TIMED/GUVI disk and limb measurements over half of a solar cycle from 2002 to 2007. The data indicate a positive correlation between O/N2 and solar EUV flux…
Ubiquitous quiet-Sun jets
Martínez Pillet, V.; Quintero Noda, C.; Del Toro Iniesta, J. C.
Context. IMaX/Sunrise has recently reported the temporal evolution of highly dynamic and strongly Doppler shifted Stokes V signals in the quiet Sun.
Aims: We attempt to identify the same quiet-Sun jets in the Hinode spectropolarimeter (SP) data set.
Methods: We generate combinations of linear polarization magnetograms with blue- and reds…
Probing the Star Formation History and Initial Mass Function of the z ~ 2.5 Lensed Galaxy SMM J163554.2+661225 with Herschel
Papovich, Casey; Finkelstein, Steven L.; Egami, Eiichi +6 more
We present the analysis of Herschel Spectral and Photometric Imaging Receiver far-infrared (FIR) observations of the z = 2.515 lensed galaxy SMM J163554.2+661225. Combining new 250, 350, and 500 µm observations with existing data, we make an improved fit to the FIR spectral energy distribution of this galaxy. We find a total infrared (IR) lu…
A method for filling gaps in solar irradiance and solar proxy data
Dudok de Wit, T.
Context. Data gaps are ubiquitous in spectral irradiance data, and yet, little effort has been put into finding robust methods for filling them.
Aims: We introduce a data-adaptive and nonparametric method that allows us to fill data gaps in multi-wavelength or in multichannel records.
Methods: This method, which is based on the iterative…
Resolving the nuclear dust distribution of the Seyfert 2 galaxy NGC 3081
Altieri, B.; Valtchanov, I.; Esquej, P. +13 more
We report far-infrared (FIR) imaging of the Seyfert 2 galaxy NGC 3081 in the range 70-500 µm, obtained with an unprecedented angular resolution, using the Herschel Space Observatory instruments PACS and SPIRE. The 11 kpc (∼70 arcsec) diameter star-forming ring of the galaxy appears resolved up to 250 µm. We extracted IR (1.6-500 µ…