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Far-Infrared Excited Hydroxyl Lines from Orion KL Outflows
Cernicharo, José; Viti, Serena; Barlow, Michael J. +6 more
As part of the first far-IR line survey toward Orion KL, we present the detection of seven new rotationally excited OH Λ-doublets (at ~48, ~65, ~71, ~79, ~98, and ~115 µm). Observations were performed with the Long Wavelength Spectrometer Fabry-Pérot on board the Infrared Space Observatory. In total, more than 20 resolved OH rotational lines…
A steep fan at Coprates Catena, Valles Marineris, Mars, as seen by HRSC data
Neukum, G.; Hauber, E.; Reiss, D. +4 more
We investigate a steep fan-like deposit in the Coprates Catena region, using the new High Resolution Stereo Camera (HRSC) data and other Martian data sets. Water flowing in a 45-km-long sapping valley entered a deep trough and formed a stepped fan 1100-m-high above the trough floor with a mean slope of 7.4°. The origin of the fan is uncertain. How…
GRB 050223 : a dark GRB in a dusty starburst galaxy
Cimatti, A.; Le Floc'h, E.; Piro, L. +19 more
Aims.We aim at detecting and determining the properties of the host galaxy of the dark
Methods: .We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties.
Results: .We find a single galaxy within the Swift error box of
[CII] emission and star formation in the spiral arms of M 31
Braine, J.; Brouillet, N.; Combes, F. +1 more
Context: .The [Cii] 158 µm line is the most important coolant of the interstellar medium in galaxies but substantial variations are seen from object to object. The main source of the emission at a galactic scale is still poorly understood and candidates range from photodissociation regions (PDRs) to the cold neutral or diffuse warm ionized m…
Discovery of a Candidate Central Compact Object in the Galactic Nonthermal SNR G330.2+1.0
Pavlov, George G.; Kargaltsev, Oleg; Hughes, John P. +5 more
We report on the discovery of a pointlike source (CXOU J160103.1-513353) at the center of the Galactic supernova remnant (SNR) G330.2+1.0 with Chandra X-Ray Observatory. The X-ray spectrum fits a blackbody model with kT~0.49 keV, implying a small emission region of R~0.4 km at the distance of 5 kpc. The estimated X-ray luminosity is LX~…
Low Redshift BAL QSOs in the Eigenvector 1 Context
Marziani, P.; Zamanov, R.; Braito, V. +4 more
We attempt to characterize the geometry of Broad Absorption Line (BAL) QSOs by studying a low redshift sample of 12 sources. We find that the majority of these sources are Population A quasars as defined in Sulentic et al. (2000a, broad HbetaFWHM ≤ 4000 km s(-1) ). A possible correlation between terminal velocity and absolute V magnitude suggests …
The XMM-Newton Examination of Energetics in the East Lobe of the Nearby Radio Galaxy Fornax A (NGC 1316)
Isobe, N.; Makishima, K.; Tashiro, M. +4 more
An XMM-Newton observation of the east radio lobe of the nearby radio galaxy Fornax A is reported. The diffuse hard X-ray emission associated with the east lobe, which was initially discovered by ASCA and ROSAT, is confirmed with significant signal statistics, after strictly removing 59 sources detected within the MOS field of view. Its X-ray spect…
High-resolution CASSINI-VIMS mosaics of Titan and the icy Saturnian satellites
Sotin, C.; Brown, R. H.; Baines, K. H. +26 more
The Visual Infrared Mapping Spectrometer (VIMS) onboard the CASSINI spacecraft obtained new spectral data of the icy satellites of Saturn after its arrival at Saturn in June 2004. VIMS operates in a spectral range from 0.35 to 5.2 µm, generating image cubes in which each pixel represents a spectrum consisting of 352 contiguous wavebands. As …
Discovery of a binary Centaur
Noll, Keith S.; Levison, Harold F.; Stephens, Denise C. +1 more
We have identified a binary companion to (42355) 2002 CR 46 in our ongoing deep survey using the Hubble Space Telescope's High Resolution Camera. It is the first companion to be found around an object in a non-resonant orbit that crosses the orbits of giant planets. Objects in orbits of this kind, the Centaurs, have experienced repeated…
X-ray and optical bursts and flares in YSOs: results from a 5-day XMM-Newton monitoring campaign of L1551
Micela, G.; Favata, F.; Giardino, G. +3 more
We present the results of a five-day monitoring campaign with XMM-Newton of six X-ray bright young stellar objects (YSOs) in the star-forming complex L1551 in Taurus. All stars present significant variability on the five-day time scale. Modulation of the light curve on time scales comparable with the star's rotational period appeared to be present…