Search Publications
The Relationship of the Chromosphere to the Lower Solar Transition Region
Doschek, G. A.; Mariska, J. T.; Akiyama, S.
We examine the intensity correlations among lower transition region emission lines of N III, N IV, N V, O II, O III, O IV, O V, S IV, and S V. We find strong intensity correlations, with 1 σ deviations in line intensity ratios less than about 35% on spatial scales of 1". For strong lines the percent deviations are significantly less than this. The…
Chemical Composition of 15 Photometric Analogues of the Sun
Galazutdinov, G. A.; Bikmaev, I. F.; Galeev, A. I. +1 more
The results of a spectroscopic analysis of 15 stars that are photometric analogues of the Sun are reported. The effective temperatures and surface gravities in the stellar atmospheres are derived from published photometric indices and the HIPPARCOS parallaxes. The abundances of 33 elements ranging from lithium to europium are analyzed based on hig…
Multipoint analysis of the spatio-temporal coherence of dayside O+ outflows with Cluster
Klecker, B.; Rème, H.; Kistler, L. +5 more
Available from http://www.copernicus.org/site/EGU/annales/22/7/2507.htm?FrameEngine=false;
The analysis of Abell 1835 using a deprojection technique
Chen, Y.; Chen, L.; Lu, F. J. +2 more
We present the results from a detailed deprojection analysis of Abell 1835 as observed by XMM-Newton. If we fit the spectra with an isothermal plasma model, the deprojected temperature profile is flat in the outer region around 7.6 keV and decreases to ∼5.6 keV in the center, which may be connected with the gas cooling. In the central part, a two-…
Low-Ionization Emission-Line Regions around the Nucleus of the Seyfert Galaxy NGC 1068
Hattori, Takashi; Ishigaki, Tsuyoshi; Sugai, Hajime +6 more
We present the results of tridimensional spectrophotometric observations of the central region of the Seyfert galaxy NGC 1068 obtained by using Kyoto tridimensional spectrograph I. A brief description of the instrument is presented. We have found the existence of low-ionized gas extending out of the ionization cone. It is characterized by higher (…
Identifying a black hole X-ray transient in M 31 with XMM-Newton and Chandra
Kolb, U.; Osborne, J. P.; Barnard, R.
Stochastic variability in two out of four XMM-Newton observations of XMMU J004303+4115 along with its power spectra and X-ray luminosities suggest a low-mass X-ray binary (LMXB) with a black hole primary. However, Chandra observations resolve the object into two point sources. We use data from 35 Chandra observations to analyse the contributions o…
Remote sensing of possible plasma density bubbles in the inner Jovian dayside magnetosphere
Gurnett, D. A.; Hospodarsky, G. B.; Kurth, W. S. +4 more
During the 2001 Cassini encounter with Jupiter, the Radio and Plasma Wave Science (RPWS) instrument detected fine spectral and temporal structure with broadband kilometric radiation. Applying known electron cyclotron harmonic radiation models, this microstructure is interpreted as originating from a plasma density depletion or bubble at the edge o…
The z~4 Lyman Break Galaxies: Colors and Theoretical Predictions
Papovich, Casey; Ferguson, Henry C.; Giavalisco, Mauro +4 more
We investigate several fundamental properties of z~4 Lyman break galaxies by comparing observations with the predictions of a semianalytic model based on the cold dark matter theory of hierarchical structure formation. We use a sample of B435-dropouts from the Great Observatories Origins Deep Survey and complement the Advanced Camera fo…
The Impact of Space Experiments on our Knowledge of the Physics of the Universe
Giovannelli, Franco; Sabau-Graziati, Lola
With the advent of space experiments it was demonstrated that cosmic sources emit energy practically across all the electromagnetic spectrum via different physical processes. Several physical quantities give witness to these processes which usually are not stationary; those physical observable quantities are then generally variable. Therefore simu…
A possible new dipping X-ray source in the field of M 31
Stella, L.; Israel, G. L.; Mangano, V.
We report the discovery of the new dipping X-ray source, XMMU J004308.6+411247, in M 31, during a systematic search for periodicities in XMM-Newton archival observations. During the 2002 January 6 observation, the dips recur with a 107 min period and the source count rate is consistent with zero at the dip minimum. Dips with the same modulation an…