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On the Distance and Reddening of the Starburst Galaxy IC 10
Walker, A. R.; Prada Moroni, P. G.; Degl'Innocenti, S. +16 more
We present deep and accurate optical photometry of the Local Group starburst galaxy IC 10. The photometry is based on two sets of images collected with the Advanced Camera for Surveys and with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. We provide new estimates of the tip of the red giant branch (TRGB) magnitude, m{…
Plasma convection in the magnetotail lobes: statistical results from Cluster EDI measurements
Quinn, J.; Haaland, S.; Paschmann, G. +5 more
A major part of the plasma in the Earth's magnetotail is populated through transport of plasma from the solar wind via the magnetotail lobes. In this paper, we present a statistical study of plasma convection in the lobes for different directions of the interplanetary magnetic field and for different geomagnetic disturbance levels. The data set us…
Adaptive Optics Rest-Frame V-Band Imaging of Lyman Break Galaxies at z~3: High Surface Density Disklike Galaxies?
Kobayashi, Naoto; Minowa, Yosuke; Ohta, Kouji +3 more
In order to reveal the rest-frame V-band morphology of galaxies at z ~ 3, we conducted AO-assisted K-band imaging observations of z ~ 3 LBGs whose absolute magnitudes range from MV* - 0.5 mag to MV* + 3.0 mag, with MV*, the characteristic absolute magnitude of z ~ 3 LBGs, of -24.0 mag. The AO observations resolve m…
Comparison of periodic substorms at Jupiter and Earth
Krupp, N.; Woch, J.; Lagg, A. +3 more
The Energetic Particles Detector and magnetometer measurements on Galileo showed that the Jovian magnetosphere undergoes reconfiguration processes which are very similar to the characteristics of a terrestrial substorm. At Jupiter the reconfiguration process occurs quasi-periodically with a repetition period of several days. In the terrestrial mag…
Physical Properties of the AXP 4U 0142+61 from X-Ray Spectral Analysis
Göğüş, Ersin; Güver, Tolga; Özel, Feryal
We analyze archival Chandra and XMM-Newton data of 4U 0142+61 within the context of the surface thermal emission and magnetospheric scattering model. We show that the 4U 0142+61 spectrum can be fit very well with this physical model that contains only four parameters. The system parameters can be tightly constrained from the fits, yielding a surfa…
Formation of the low-latitude boundary layer and cusp under the northward IMF: Simultaneous observations by Cluster and Double Star
Dandouras, I.; Davies, J. A.; Wild, J. A. +9 more
On 28 February 2004 the configuration of the Cluster and Double Star TC1 satellites facilitated a simultaneous study of plasma properties inside the low-latitude boundary layer (LLBL) near the subsolar magnetopause and inside the midaltitude cusp during an interval with strong northward IMF. TC1, crossing the dayside magnetopause, observed a compl…
Analysis of the Sensitivity of Solar Rotation to Helioseismic Data from GONG, GOLF, and MDI Observations
Eff-Darwich, A.; Korzennik, S. G.; Jiménez-Reyes, S. J. +1 more
Accurate determination of the rotation rate in the radiative zone of the Sun from helioseismic observations requires rotational frequency splittings of exceptional quality as well as reliable inversion techniques. Here we present inferences based on mode parameters calculated from 2088 day MDI, GONG, and GOLF time series that were fitted to estima…
Can Cassini detect a subsurface ocean in Titan from gravity measurements?
Iess, Luciano; Tortora, Paolo; Lunine, Jonathan I. +6 more
Recent models of Titan's interior predict that the satellite contains an ocean of water and ammonia under an icy layer. Direct evidence for the presence of an ocean can be provided on the Cassini mission only by radio science determination of Titan Love number k. Simulations that use the five flybys T11, T22 T33, T45, and T68 (the latter two belon…
Coronal Hard X-Ray Emission Associated with Radio Type III Bursts
Krucker, Säm; Bale, S. D.; Lin, R. P. +4 more
We report on a purely coronal hard X-ray source detected in a partially disk-occulted solar flare by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) that is associated with radio type III bursts and a suprathermal electron event detected near 1 AU by the WIND 3-D Plasma and Energetic Particle (3DP) instrument. Several observation…
Combining remote and in situ observations of coronal mass ejections to better constrain magnetic cloud reconstruction
Owens, M. J.
Determination of the nonradial extent of magnetic clouds (MCs) is vital for two key reasons. First, it affects the amount of "drag" a fast MC experiences and therefore controls the travel time from the Sun to 1-AU, a critical parameter for space-weather prediction. Second, it is vital to estimating the flux content of MCs, which in turn is importa…