Search Publications
Comparing SWAS and ISO observations of water in outflows
Benedettini, M.; Goldsmith, P. F.; Nisini, B. +3 more
We present a detailed comparison of SWAS and ISO observations of H2O, emission in a sample of outflows. By taking into consideration the different methods used to derive the fractional water abundance, we find that, despite the initial apparent discrepancies, there is satisfactory agreement between ISO and SWAS results for the outflows …
The extended atmosphere and evolution of the RV Tau star, R Scuti
Zijlstra, A. A.; Bedding, T. R.; Yamamura, I. +1 more
We analyze ISO/SWS spectra of the RV Tau star R Scuti. The infrared spectra are dominated by H2O emission bands. The near- and mid-infrared excess is attributed to H2O; the dust contribution is less important. We also identify CO, SiO and CO2 bands. The various molecular emission bands originate from an extended at…
The lensing system towards the doubly imaged quasar SBS 1520+530
Bolzonella, M.; Faure, C.; Alloin, D. +3 more
The gravitational potential responsible for the lensing effect in SBS 1520+530, is studied over length scales from a few arc-seconds to a few arc-minutes. For this purpose, we use sharply deconvolved Hubble Space Telescope images in the optical and near-IR, in combination with ground based optical data obtained over a wider field-of-view. In parti…
Far-infrared/millimetre emission in 3C sources. Dust in radio galaxies and quasars
Andreani, P.; Fosbury, R. A. E.; Freudling, W. +1 more
We present far-infrared and millimetric observations of a sample of 3C objects. Millimetre data were taken at 1.25 mm with the IRAM 30 m antenna feeding the MPIfR bolometer array. Mid-infrared (MIR) and far-infrared (FIR) photometry were carried out with the ISOCAM and ISOPHOT cameras on the ISO Satellite. Additional FIR IRAS observations are also…
Submm/FIR CO line emission from the disk of the Class I protostar EL 29
Ceccarelli, C.; Caux, E.; Tielens, A. G. G. M. +3 more
We present observations towards the Class I protostar EL 29 of the CO J=6 -> 5 and J >= 15 transitions obtained with JCMT and ISO LWS respectively, and of five H_2 rotational lines obtained with ISO SWS. The simultaneous analysis of these observations reveals the presence of a warm gas component at about 170-250 K, ~ 550 AU in size, and whos…
Magellanic Clouds stellar clusters. II. New B,V CM diagrams for 6 LMC and 10 SMC clusters
Ripepi, V.; Castellani, V.; Brocato, E. +1 more
We present new CCD photometry for 6 LMC and 10 SMC stellar clusters taken at the ESO 1.54-m Danish Telescope in La Silla, to extend a previous investigation on Magellanic Clouds clusters based on HST snapshots. Thanks to the much larger area covered by the Danish detector, we investigate the spatial distribution of cluster stars, giving V, (B-V) C…
Detection of highly-ionized diffuse gas in the Galactic plane
Onaka, T.; Shibai, H.; Mizutani, M.
We obtained maps of the central 40arcmin x 20arcmin region of the
Temporal evolution of different temperature plasma during explosive events
Doyle, J. G.; Madjarska, M. S.
High cadence observations (10 s exposure time) obtained with the SUMER spectrometer on-board SoHO in the Ly 6 (20 000 K) and S VI (200 000 K) lines reveal new insight on the nature of explosive events. A time delay in the response of the S VI line with respect to the Ly 6 line has been observed, with the Ly 6 line responding with about 20-40 s ear…
The nature of the X-ray transient SAX J1711.6-3808
Santos-Lleo, M.; Ubertini, P.; Bazzano, A. +8 more
SAX J1711.6-3808 is an X-ray transient in the Galactic bulge that was active from January through May of 2001 and whose maximum 1-200 keV luminosity was measured to be 5x 10-9 erg cm-2 s-1 which is less than ~ 25% of the Eddington limit, if placed at a distance equal to that of the galactic center. We study the X-r…
STIS spectroscopy of newborn massive stars in SMC N81
Schaerer, D.; Martins, F.; Heydari-Malayeri, M. +2 more
Using Hubble Space Telescope observations with STIS, we study the main exciting stars of N81, a high excitation compact H II, region in the Small Magellanic Cloud (SMC). These far UV observations are the first spectroscopic measurements of stars in such a region and reveal features characteristic of an O6-O8 stellar type. The astonishing weakness …