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XMM-Newton observation of the Lockman Hole. I. The X-ray data
Finoguenov, A.; Altieri, B.; Arnaud, M. +25 more
We report on the first deep X-ray survey with the XMM-Newton observatory during the performance verification phase. The field of the Lockman Hole, one of the best studied sky areas over a very wide range of wavelengths, has been observed. A total of ~ 100 ksec good exposure time has been accumulated. Combining the images of the European Photon Ima…
X-ray spectroscopy of the cluster of galaxies Abell 1795 with XMM-Newton
Kaastra, J. S.; Fabian, A. C.; Mushotzky, R. F. +8 more
The initial results from XMM-Newton observations of the rich cluster of galaxies
The CH out-of-plane bending modes of PAH molecules in astrophysical environments
Hony, S.; Tielens, A. G. G. M.; Allamandola, L. J. +3 more
We present 10-15 mu m spectra of a sample of H ii regions, YSOs and evolved stars that show strong unidentified infrared emission features, obtained with the ISO/SWS spectrograph on-board ISO. These spectra reveal a plethora of emission features with bands at 11.0, 11.2, 12.0, 12.7, 13.5 and 14.2 mu m. These features are observed to vary considera…
Processing of silicate dust grains in Herbig Ae/Be systems
Waters, L. B. F. M.; Hony, S.; Dominik, C. +3 more
We have analysed the 10 mu m spectral region of a sample of Herbig Ae/Be (HAEBE) stars. The spectra are dominated by a broad emission feature caused by warm amorphous silicates, and by polycyclic aromatic hydrocarbons. In HD 163296 we find aliphatic carbonaceous dust, the first detection of this material in a HAEBE star. The silicate band shows a …
The SUMER spectral atlas of solar-disk features
Dwivedi, B. N.; Wilhelm, K.; Curdt, W. +4 more
A far-ultraviolet and extreme-ultraviolet (FUV, EUV) spectral atlas of the Sun between 670 Å and 1609 Å in the first order of diffraction has been derived from observations obtained with the SUMER (Solar Ultraviolet Measurements of Emitted Radiation) spectrograph on the spacecraft SOHO (Solar and Heliospheric Observatory). The atlas contains spect…
ISOCAM observations of the rho Ophiuchi cloud: Luminosity and mass functions of the pre-main sequence embedded cluster
Prusti, T.; Olofsson, G.; Boulanger, F. +19 more
We present the results of the first extensive mid-infrared (IR) imaging survey of the rho Ophiuchi embedded cluster, performed with the ISOCAM camera on board the ISO satellite. The main rho Ophiuchi molecular cloud L1688, as well as the two secondary clouds L1689N and L1689S, have been completely surveyed for point sources at 6.7 mu m and 14.3 mu…
EXPORT: Spectral classification and projected rotational velocities of Vega-type and pre-main sequence stars
Rauer, H.; Schneider, J.; Eiroa, C. +19 more
In this paper we present the first comprehensive results extracted from the spectroscopic campaigns carried out by the EXPORT (EXoPlanetary Observational Research Team) consortium. During 1998-1999, EXPORT carried out an intensive observational effort in the framework of the origin and evolution of protoplanetary systems in order to obtain clues o…
delta Scuti and related stars: Analysis of the R00 Catalogue
Rodríguez, E.; Breger, M.
We present a comprehensive analysis of the properties of the pulsating delta Scuti and related variables based mainly on the content of the recently published catalogue by Rodríguez et al. (\cite{retal00a}, hereafter R00). In particular, the primary observational properties such as visual amplitude, period and visual magnitude and the contribution…
XMM-Newton observations of the cluster of galaxies Sérsic 159-03
Kaastra, J. S.; Ferrigno, C.; Tamura, T. +3 more
The cluster of galaxies Sérsic 159-03 was observed with the XMM-Newton X-ray observatory as part of the Guaranteed Time program. X-ray spectra taken with the EPIC and RGS instruments show no evidence for the strong cooling flow derived from previous X-ray observations. There is a significant lack of cool gas below 1.5 keV as compared to standard i…
Ice absorption features in the 5-8 µm region toward embedded protostars
Whittet, D. C. B.; Schutte, W. A.; Tielens, A. G. G. M. +2 more
We have obtained 5-8 µm spectra towards 10~embedded protostars using the Short Wavelength Spectrometer on board the Infrared Space Observatory (ISO-SWS) with the aim of studying the composition of interstellar ices. The spectra are dominated by absorption bands at 6.0 µm and 6.85 µm. The observed peak positions, widths and relati…