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Solar Mass Ejection Imager 3-D reconstruction of the 27-28 May 2003 coronal mass ejection sequence
Jackson, B. V.; Buffington, A.; Hick, P. P. +3 more
The Solar Mass Ejection Imager (SMEI) has recorded the inner-heliospheric response in white-light Thomson scattering for many hundreds of interplanetary coronal mass ejections (ICMEs). Some of these have been observed by the Solar and Heliospheric Observatory (SOHO) Large-Angle Spectroscopic Coronagraph (LASCO) instruments and also in situ by near…
Recent progress on ULF wave and its interactions with energetic particles in the inner magnetosphere
Pu, Z. Y.; Zong, Q. G.; Fritz, T. A. +4 more
On the edge of the foreshock: model-data comparisons
Dandouras, I.; Lucek, E.; Omidi, N. +1 more
We present the results of a global hybrid code simulation for the solar wind-interaction with the Earth's magnetosphere during an interval of steady radial IMF. The model predicts a foreshock marked by innumerable localized, correlated, and large amplitude, density and magnetic field strength variations, depressed velocities, and enhanced temperat…
The host of GRB 060206: kinematics of a distant galaxy
Vreeswijk, P. M.; Wijers, R. A. M. J.; Rol, E. +13 more
Context: GRB afterglow spectra are sensitive probes of interstellar matter along the line-of-sight in their host galaxies, as well as in intervening galaxies. The rapid fading of GRBs makes it very difficult to obtain spectra of sufficient resolution and S/N to allow for these kinds of studies.
Aims: We investigate the state and properties of …
Theoretical Fits of the δ Cephei Light, Radius, and Radial Velocity Curves
Marconi, Marcella; Bono, Giuseppe; Natale, Giovanni
We present a theoretical investigation of the light, radius, and radial velocity variations of the prototype δ Cephei. We find that the best-fit model accounts for luminosity and velocity amplitudes with an accuracy better than 0.8 σ, and for the radius amplitude with an accuracy of 1.7 σ. The chemical composition of this model suggests a decrease…
Variability-selected active galactic nuclei from supernova search in the Chandra deep field south
Boutsia, K.; Cappellaro, E.; Puccetti, S. +2 more
Context: Variability is a property shared by virtually all active galactic nuclei (AGNs), and was adopted as a criterion for their selection using data from multi epoch surveys. Low Luminosity AGNs (LLAGNs) are contaminated by the light of their host galaxies, and cannot therefore be detected by the usual colour techniques. For this reason, their …
The Initial Mass Function of the Stellar Association NGC 602 in the Small Magellanic Cloud with Hubble Space Telescope ACS Observations
Henning, Thomas; Gouliermis, Dimitrios A.; Dolphin, Andrew E. +1 more
We present our photometric study of the stellar association NGC 602 in the wing of the Small Magellanic Cloud (SMC). The data were taken in the filters F555W and F814W using the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). Photometry was performed using the ACS module of the stellar photometry package DOLPHOT. We de…
Simultaneous Estimation of Time Delays and Quasar Structure
Kochanek, C. S.; Morgan, Nicholas D.; Meylan, G. +5 more
We expand our Bayesian Monte Carlo method for analyzing the light curves of gravitationally lensed quasars to simultaneously estimate time delays and the sizes of quasar continuum emission regions including their mutual uncertainties. We apply the method to HE1104-1805 and QJ0158-4325, two doubly imaged quasars with microlensing and intrinsic vari…
Titan airglow spectra from the Cassini Ultraviolet Imaging Spectrograph: FUV disk analysis
Stewart, Ian; Gustin, Jacques; Ajello, Joseph M. +7 more
We present a spectral analysis of the far ultraviolet (FUV: 1150-1900 Å) disk airglow observations of Titan's atmosphere by the Cassini Ultraviolet Imaging Spectrograph (UVIS). The FUV spectrum consists of emissions from the Lyman-Birge-Hopfield (LBH) band system of N2 excited by photoelectrons (a 1Πg → X 1Σg +), N I multiplets from solar photodis…
On the White Dwarf Cooling Sequence of the Globular Cluster ω Centauri
Degl'Innocenti, S.; Marchetti, E.; Pulone, L. +16 more
We present deep and precise photometry (F435W, F625W, F658N) of ω Cen collected with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). We have identified ≈6500 white dwarf (WD) candidates, and the ratio of WD to main-sequence (MS) star counts is found to be at least a factor of 2 larger than the ratio of CO-core WD c…