Search Publications
High-resolution study of the young stellar objects in Mon R2 IRS 3
Weigelt, G.; Schertl, D.; Preibisch, T. +1 more
We present a bispectrum speckle interferometry study of the embedded young stellar objects in Mon R2 IRS 3 in the near-infrared H and K bands. Our images with a resolution of 75 mas (cor 62 AU) show a close triple system surrounded by strong diffuse nebulosity and three additional infrared sources (K magnitudes ~ 11.8-13.7) within 3'' of the brigh…
Balmer lines emission region in NGC 3516: Kinematical and physical properties
Jovanović, P.; Popović, L. Č.; Mediavilla, E. G. +1 more
We have studied the Balmer line shapes of NGC 3516 in order to find the structure of central Emission Line Region (ELR) and the physical parameters of the emitting plasma. The shapes of these broad emission lines show evidences of a multicomponent origin and also features which could be identified as the peaks of a rotating disc. We have proposed …
The spectroscopic orbits and the geometrical configuration of the symbiotic binary AR Pavonis
Mikołajewska, J.; Quiroga, C.; Brandi, E. +2 more
We analyze optical and near infrared spectra of intermediate and high resolution of the eclipsing symbiotic system AR Pavonis. We have obtained the radial velocity curves for the red and the hot component from the M-giant absorption lines and from the wings of Hα , Hβ and He II lambda 4686 emission profiles, respectively. From the orbital elements…
A multiwavelength timing analysis of the eclipsing polar DP Leo
Gänsicke, B. T.; Kanbach, G.; Schwope, A. D. +2 more
We present an analysis of the X-ray light curves of the magnetic cataclysmic variable DP Leo using recently performed XMM-Newton EPIC and archival published and unpublished ROSAT/ PSPC observations. We combine the timings of the X-ray eclipses with timings derived from archival HST-observations and new optical observations with the photon counting…
The anomalous X-ray pulsar 1E 1048.1-5937: Phase resolved spectroscopy with the XMM-Newton satellite
Tiengo, A.; Mereghetti, S.; Staubert, R. +1 more
We report on an observation of the anomalous X-ray pulsar 1E 1048.1-5937 performed with the XMM-Newton satellite. The phase averaged spectrum of 1E 1048.1-5937 is well described by the sum of a power law with photon index ~ 2.9 and a blackbody with temperature ~ 0.6 keV, without evidence for significant absorption or emission lines. The above spec…
Far-infrared and molecular line observations of Lynds 183 - Studies of cold gas and dust
Prusti, T.; Juvela, M.; Lemke, D. +3 more
We have mapped the dark cloud L183 in the far-infrared at 100 mu m and 200 mu m with the ISOPHOT photometer aboard the ISO satellite. The observations make it possible for the first time to study the distribution and properties of the large dust grains in L183 without confusion from smaller grains. The observations show clear colour temperature va…
Cosmic shear from STIS pure parallels. II. Analysis
White, S. D. M.; Fosbury, R. A. E.; Schneider, P. +6 more
We report on the marginal detection of cosmic shear on sub-arcmin scales with archive data from the STIS camera on board HST. For the measurement 121 galaxy fields with a field of view of 51'' x 51'' are used to obtain an rms cosmic shear of ~ 4% with 1.5sigma significance. This value is consistent with groundbased results obtained by other groups…
Survey of the ISM in early-type galaxies. IV. The hot dust component
Panagia, N.; Macchetto, F. D.; Pastoriza, M. G. +3 more
We present mid-IR photometric properties for a sample of 28 early-type galaxies observed at 6.75, 9.63 and 15 mu m with the ISOCAM instrument on board the ISO satellite. We find total mid-IR luminosities in the range (3-42) x 108 Lsun. The spectral energy distributions (SED) of the galaxies were derived using the mid-IR data …
A chromospheric scenario for the activity of beta Pictoris, as revealed by FUSE
Deleuil, M.; Bouret, J. -C.; Roberge, A. +3 more
We investigate a chromospheric scenario to explain the characteristics of the far-UV emission lines of beta Pictoris, revealed by FUSE spectra of this famous circumstellar disk system. The model assumes a thin region heated up to a few 105 K located close to the stellar photosphere. The resonance lines of C III at 977 Å and O VI at 1032…
XMM-Newton observations of the isolated neutron star RX J0806.4-4123
Haberl, F.; Zavlin, V. E.
The isolated neutron star