Search Publications
Missions
Journals
Publication Years
What are the physical mechanisms of eruptions and CMEs?
Aulanier, Guillaume; Schmieder, Brigitte
CMEs are due to physical phenomena that drive both, eruptions and flares in active regions. Eruptions/CMEs must be driven from initially force-free current-carrying magnetic field. Twisted flux ropes, sigmoids, current lanes and pattern in photospheric current maps show a clear evidence of currents parallel to the magnetic field. Eruptions occur s…
A Conditional Luminosity Function Model of the Cosmic Far-infrared Background Anisotropy Power Spectrum
Cooray, Asantha; De Bernardis, Francesco
The cosmic far-infrared background (CFIRB) is expected to be generated by faint, dusty star-forming galaxies during the peak epoch of galaxy formation. The anisotropy power spectrum of the CFIRB captures the spatial distribution of these galaxies in dark matter halos and the spatial distribution of dark matter halos in the large-scale structure. E…
The nuclear polycyclic aromatic hydrocarbon emission of merger system NGC 1614: rings within rings
Reunanen, Juha; Väisänen, Petri; Zijlstra, Albert A. +2 more
It is important to understand the interplay between nuclear star formation and nuclear activity when studying the evolution of gas-rich galaxy mergers. We present here new spatially resolved L-band integral field unit observations of the inner kpc of the luminous infrared galaxy NGC 1614. A broad ring of 3.3-µm polycyclic aromatic hydrocarbo…
Turbulent Characteristics in the Intensity Fluctuations of a Solar Quiescent Prominence Observed by the Hinode Solar Optical Telescope
Foullon, C.; Chapman, S. C.; Leonardis, E.
We focus on Hinode Solar Optical Telescope (SOT) calcium II H-line observations of a solar quiescent prominence (QP) that exhibits highly variable dynamics suggestive of turbulence. These images capture a sufficient range of scales spatially (~0.1-100 arcsec) and temporally (~16.8 s-4.5 hr) to allow the application of statistical methods used to q…
Tidal control of jet eruptions on Enceladus as observed by Cassini ISS between 2005 and 2007
Spitale, J. N.; Helfenstein, P.; Hurford, T. A.
Observations of Enceladus have revealed active jets of material erupting from cracks on its south polar surface. It has previously been proposed that diurnal tidal stress, driven by Enceladus' orbital eccentricity, may actively produce surface movement along these cracks daily and thus may regulate when eruptions occur. Our analysis of the stress …
Discovery of "Warm Dust" Galaxies in Clusters at z ~ 0.3: Evidence for Stripping of Cool Dust in the Dense Environment?
Smail, I.; Altieri, B.; Valtchanov, I. +15 more
Using far-infrared imaging from the "Herschel Lensing Survey," we derive dust properties of spectroscopically confirmed cluster member galaxies within two massive systems at z ~ 0.3: the merging Bullet Cluster and the more relaxed MS2137.3-2353. Most star-forming cluster sources (~90%) have characteristic dust temperatures similar to local field g…
Helioseismology of a Realistic Magnetoconvective Sunspot Simulation
Birch, A. C.; Braun, D. C.; Rempel, M. +1 more
We compare helioseismic travel-time shifts measured from a realistic magnetoconvective sunspot simulation using both helioseismic holography and time-distance helioseismology, and measured from real sunspots observed with the Helioseismic and Magnetic Imager instrument on board the Solar Dynamics Observatory and the Michelson Doppler Imager instru…
The Road to the Red Sequence: A Detailed View of the Formation of a Massive Galaxy at z ~ 2
Hathi, Nimish P.; Pirzkal, Nor; Cohen, Seth +11 more
Over half of the census of massive galaxies at z ~ 2 are dominated by quiescent stellar populations. The formation mechanism for these galaxies is still under debate, with models relying either on massive and early mergers or cold accretion. It is therefore imperative to understand in detail the properties of these galaxies. We present here a deta…
Evolution of the Symbiotic Nova PU Vul—Outbursting White Dwarf, Nebulae, and Pulsating Red Giant Companion
Kato, Mariko; Hachisu, Izumi; Mikołajewska, Joanna
We present a composite light-curve model of the symbiotic nova PU Vul (Nova Vulpeculae 1979) that shows a long-lasting flat optical peak followed by a slow decline. Our model light curve consists of three components of emission, i.e., an outbursting white dwarf (WD), its M-giant companion, and the nebulae. The WD component dominates in the flat pe…
The relative and absolute timing accuracy of the EPIC-pn camera on XMM-Newton, from X-ray pulsations of the Crab and other pulsars
Guainazzi, M.; Freyberg, M. J.; Wellbrock, A. +13 more
Aims: Reliable timing calibration is essential for the accurate comparison of XMM-Newton light curves with those from other observatories, to ultimately use them to derive precise physical quantities. The XMM-Newton timing calibration is based on pulsar analysis. However, because pulsars show both timing noise and glitches, it is essential to…