Search Publications
Merging Galaxy Cluster A2255 in Mid-infrared
Goto, Tomotsugu; Kim, Seong Jin; Hwang, Narae +11 more
We present the mid-infrared (MIR) observation of a nearby galaxy cluster, A2255, by the AKARI space telescope. Using AKARI's continuous wavelength coverage between 3 and 24 µm and the wide field of view, we investigate the properties of cluster member galaxies to see how the infall of the galaxies, the cluster substructures, and the cluster-…
The Planck-ATCA Coeval Observations project: the faint sample
Bonaldi, Anna; de Zotti, Gianfranco; Massardi, Marcella +3 more
The Planck-ATCA Coeval Observations (PACO) project collected data between 4.5 and 40 GHz for 482 sources selected within the Australia Telescope 20 GHz (AT20G) catalogue and observed with the Australia Telescope Compact Array. Observations were done almost simultaneously with the Planck satellite, in the period between 2009 July and 2010 August. I…
Multiple responses of magnetotail to the enhancement and fluctuation of solar wind dynamic pressure and the southward turning of interplanetary magnetic field
Zhang, T. L.; Dandouras, I.; Rème, H. +5 more
During the interval from 06:15 to 07:30 UT on 24 August 2005, the Chinese Tan-Ce 1 (TC1) satellite observed the multiple responses of the near-Earth magnetotail to the combined changes in solar wind dynamic pressure and interplanetary magnetic field (IMF). The magnetotail was highly compressed by a strong interplanetary shock because of the dynami…
A Snapshot of the Sun Near Solar Minimum: The Whole Heliosphere Interval
Galvin, Antoinette B.; de Toma, Giuliana; Welsch, Brian T. +22 more
We present an overview of the data and models collected for the Whole Heliosphere Interval, an international campaign to study the three-dimensional solar-heliospheric-planetary connected system near solar minimum. The data and models correspond to solar Carrington Rotation 2068 (20 March - 16 April 2008) extending from below the solar photosphere…
Suzaku Observations of Iron K-Lines from the Intracluster Medium of the Coma Cluster
Sarazin, Craig L.; Sato, Kosuke; Nakazawa, Kazuhiro +3 more
The Coma cluster was observed with the X-ray Imaging Spectrometer (XIS) onboard Suzaku in six pointings, including the central X-ray peak region, 14
The Christiansen Effect in Saturn's narrow dusty rings and the spectral identification of clumps in the F ring
Sotin, C.; Brown, R. H.; Buratti, B. J. +5 more
Stellar occultations by Saturn's rings observed with the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft reveal that dusty features such as the F ring and the ringlets in the Encke and the Laplace Gaps have distinctive infrared transmission spectra. These spectra show a narrow optical depth minimum at wavelengths aro…
Forbidden and Intercombination Lines of RR Telescopii: Wavelength Measurements and Energy Levels
Young, P. R.; Lobel, A.; Feldman, U.
Ultraviolet and visible spectra of the symbiotic nova RR Telescopii are used to derive reference wavelengths for many forbidden and intercombination transitions of ions +1 to +6 of elements C, N, O, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, and Ca. The wavelengths are then used to determine new energy values for the levels within the ions' ground confi…
Observed Damping of the Slow Magnetoacoustic Mode
Marsh, M. S.; De Moortel, I.; Walsh, R. W.
Spectroscopic and stereoscopic imaging observations of slow magnetoacoustic wave propagation within a coronal loop are investigated to determine the decay length scale of the slow magnetoacoustic mode in three dimensions and the density profile within the loop system. The slow wave is found to have an e-folding decay length scale of 20,000+40…
First Global Rotation Inversions of HMI Data
Thompson, M. J.; Howe, R.; Komm, R. +4 more
We present the first 2-dimensional global rotational inversions of medium-degree p-mode data from the Helioseismic and Magnetic Imager, and compare the results with inversions of Michelson Doppler Imager data for the same time period. The inferred rotation profiles show good agreement between the two instruments.
Can a Long Nanoflare Storm Explain the Observed Emission Measure Distributions in Active Region Cores?
Winebarger, Amy R.; Warren, Harry P.; Mulu-Moore, Fana M.
All theories that attempt to explain the heating of the high-temperature plasma observed in the solar corona are based on short bursts of energy. The intensities and velocities measured in the cores of quiescent active regions, however, can be steady over many hours of observation. One heating scenario that has been proposed to reconcile such obse…