Search Publications
Excitation and abundance of C3 in star forming cores. Herschel/HIFI observations of the sight-lines to W31C and W49N
Menten, K. M.; Perault, M.; Boulanger, F. +48 more
We present spectrally resolved observations of triatomic carbon (C3) in several ro-vibrational transitions between the vibrational ground state and the low-energy ν2 bending mode at frequencies between 1654-1897 GHz along the sight-lines to the submillimeter continuum sources W31C and W49N, using Herschel's HIFI instrument. W…
X-rays from Saturn: a study with XMM-Newton and Chandra over the years 2002-05
Branduardi-Raymont, G.; Elsner, R. F.; Rodriguez, P. +1 more
Aims: We approach the study of Saturn and its environment in a novel way using X-ray data, by making a systematic and uniform spectral analysis of all the X-ray observations of the planet to date.
Methods: We present the results of the two most recent (2005) XMM-Newton observations of Saturn together with the re-analysis of an earlier (2…
Variations in H2O+/H2O ratios toward massive star-forming regions
de Graauw, Th.; Falgarone, E.; Liseau, R. +63 more
Early results from the Herschel Space Observatory revealed the water cation H2O+ to be an abundant ingredient of the interstellar medium. Here we present new observations of the H2O and H2O+ lines at 1113.3 and 1115.2 GHz using the Herschel Space Observatory toward a sample of high-mass star-f…
PMAS optical integral field spectroscopy of luminous infrared galaxies. II. Spatially resolved stellar populations and excitation conditions
Colina, L.; Monreal-Ibero, A.; Arribas, S. +3 more
Context. The general properties (e.g., activity class, star formation rates, metallicities, extinctions, average ages, etc.) of luminous (LIRGs) and ultraluminous infrared galaxies (ULIRGs) in the local universe are well known because large samples of these objects have been the subject of numerous spectroscopic works over the past three decades. …
Results from DROXO. III. Observation, source list, and X-ray properties of sources detected in the ``Deep Rho Ophiuchi XMM-Newton Observation''
Testi, L.; Grosso, N.; Micela, G. +8 more
Context. X-rays from very young stars are powerful probes to investigate the mechanisms at work in the very first stages of the star formation and the origin of X-ray emission in very young stars.
Aims: We present results from a 500 ks long observation of the Rho Ophiuchi cloud with a XMM-Newton large program named DROXO, aiming at studying t…
Metal abundances in the hottest known DO white dwarf (KPD 0005+5106)
Rauch, T.; Werner, K.; Kruk, J. W. +1 more
We present the analysis of ultraviolet and optical spectra of KPD 0005+5106. Redetermination of the atmospheric parameters is necessary because the recent discovery of highly ionised metals (Ne VIII, Ca X) indicates that the effective temperature is significantly higher than previously thought. Here we announce the discovery of lines from highly i…
X-ray imaging of the ionisation cones in NGC 5252
Bianchi, S.; Cappi, M.; Guainazzi, M. +4 more
Context. The physical conditions of the gas forming the narrow-line regions (NLR) in active galactic nuclei (AGN) have been extensively studied in the optical band. Recently detailed X-ray studies have shown how the emission in the 0.1-2 keV band detected in Seyfert 2 galaxies is associated to gas lying close to or associated with the NLR.
Ai…
Microlensing in H1413+117: disentangling line profile emission and absorption in a broad absorption line quasar
Riaud, P.; Sluse, D.; Anguita, T. +2 more
On the basis of 16 years of spectroscopic observations of the four components of the gravitationally lensed broad absorption line (BAL) quasar H1413+117, covering the ultraviolet to visible rest-frame spectral range, we analyze the spectral differences observed in the P Cygni-type line profiles and have used the microlensing effect to derive new c…
AKARI's infrared view on nearby stars. Using AKARI infrared camera all-sky survey, 2MASS, and Hipparcos catalogs
Matsunaga, N.; Matsuhara, H.; Oyabu, S. +11 more
Context. The AKARI, a Japanese infrared space mission, has performed an All-Sky Survey in six infrared-bands from 9 to 180 µm with higher spatial resolutions and better sensitivities than IRAS.
Aims: We investigate the mid-infrared (9 and 18 µm) point source catalog (PSC) obtained with the infrared camera (IRC) onboard AKARI, in o…
Improving the identification of high-z Herschel sources with position priors and optical/NIR and FIR/mm photometric redshifts
Kneib, J. -P.; Smith, G. P.; Lutz, D. +36 more
We present preliminary results about the detection of high redshift (U)LIRGs in the Bullet cluster field by the PACS and SPIRE instruments within the Herschel Lensing Survey (HLS) Program. We describe in detail a photometric procedure designed to recover robust fluxes and deblend faint Herschel sources near the confusion noise. The method is based…