Search Publications
Non-LTE model atmospheres for supersoft X-ray sources
Rauch, T.; Werner, K.
In the last decade, X-ray observations of hot stellar objects became available with unprecedented resolution and S/N ratio. For an adequate interpretation, fully metal-line blanketed Non-LTE model-atmospheres are necessary. The Tübingen Non-LTE Model Atmosphere Package (TMAP) can calculate such model atmospheres at a high level of sophistication. …
Mapping the Recent Star Formation History of the Disk of M51
Scowen, Paul A.; Kaleida, Catherine
Using data acquired as part of a unique Hubble Heritage imaging program of broadband colors of the interacting spiral system M51/NGC 5195, we have conducted a photometric study of the stellar associations across the entire disk of the galaxy in order to assess trends in size, luminosity, and local environment associated with the recent star format…
Quasi-Periodic Oscillations in Lasco Coronal Mass Ejection Speeds
Cho, K. -S.; Moon, Y. -J.; Shanmugaraju, A. +6 more
Quasi-periodic oscillations in the speed profile of coronal mass ejections (CMEs) in the radial distance range 2-30 solar radii are studied. We considered the height-time data of the 307 CMEs recorded by the Large Angle and Spectrometric Coronagraph (LASCO) during 2005 January-March. In order to study the speed-distance profile of the CMEs, we hav…
Solar wind effects on Jupiter non-Io DAM emissions during Ulysses distant encounter (2003-2004)
Zarka, P.; Denis, L.; Echer, E. +2 more
Aims: We analyze solar wind data from the Ulysses spacecraft during the distant Jupiter encounter from 2003 November to 2004 March as well as Nançay decametric (DAM) radio observations non-controlled by Io.
Methods: The Ulysses solar wind data are balistically propagated towards Jupiter and are correlated with Nançay non-Io DAM emissions…
Auroral kilometric radiation diurnal, semidiurnal, and shorter-term modulations disentangled by Cassini
Cecconi, B.; Lamy, L.; Zarka, P. +1 more
During the flyby of the Earth by Cassini in 1999, the Radio and Plasma Wave Science (RPWS) instrument recorded a month of quasi-continuous observations of auroral kilometric radiation (AKR). Analyzing the full polarization of incoming radio waves, we found AKR to be 100% circular left-handed (LH) or right-handed (RH). As AKR is emitted predominant…
Physical Conditions in the Ultraviolet Absorbers of IRAS F22456-5125
Kraemer, S. B.; Dunn, Jay P.; Crenshaw, D. Michael +1 more
We present the ultraviolet (UV) and X-ray spectra observed with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the XMM-Newton satellite, respectively, of the low-z Seyfert 1 galaxy IRAS F22456 - 5125. This object shows absorption from five distinct, narrow kinematic components that span a significant range in velocity (~0 to -700 km s-…
Inhomogeneities on the surface of 21 Lutetia, the asteroid target of the Rosetta mission. Ground-based results before the Rosetta fly-by
Barbieri, C.; Barucci, M. A.; Fornasier, S. +6 more
Context. In July 2010 the ESA spacecraft Rosetta will fly by the main belt asteroid 21 Lutetia. Several observations of this asteroid have been performed so far, but its surface composition and nature are still a matter of debate. For a long time Lutetia was supposed to have a metallic nature due to its high IRAS albedo. Later on it has been sugge…
An algorithm for correcting CoRoT raw light curves
Schmitt, J. H. M. M.; Pätzold, M.; Guenther, E. W. +2 more
We introduce the CoRoT detrend algorithm (CDA) for detrending CoRoT stellar light curves. The algorithm CDA has the capability to remove random jumps and systematic trends encountered in typical CoRoT data in a fully automatic fashion. Since enormous jumps in flux can destroy the information content of a light curve, such an algorithm is essential…
Star forming galaxies in the AKARI deep field south: identifications and spectral energy distributions
Małek, K.; Takeuchi, T. T.; Pollo, A. +4 more
Aims: We investigate the nature and properties of far-infrared (FIR) sources in the AKARI deep field south (ADF-S).
Methods: We performed an extensive search for the counterparts to 1000 ADF-S objects brighter than 0.0301 Jy in the WIDE-S (90 µm) AKARI band in the public databases (NED and SIMBAD). We analyzed the properties of the…
Lenticular Galaxies at the Outskirts of the Leo II Group: NGC 3599 and NGC 3626
Moiseev, A. V.; Sil'chenko, O. K.; Shulga, A. P.
We have studied unbarred S0 galaxies, NGC 3599 and NGC 3626, the members of the X-ray bright group Leo II, by means of three-dimensional spectroscopy, long-slit spectroscopy, and imaging, with the aim of identifying the epoch and mechanisms of their transformation from spirals. Both galaxies have appeared to bear complex features obviously resulti…