Search Publications
The Herschel/HIFI spectral survey of OMC-2 FIR 4 (CHESS). An overview of the 480 to 1902 GHz range
Ceccarelli, C.; Dominik, C.; Caux, E. +6 more
Context. Broadband spectral surveys of protostars offer a rich view of the physical, chemical and dynamical structure and evolution of star-forming regions. The Herschel Space Observatory opened up the terahertz regime to such surveys, giving access to the fundamental transitions of many hydrides and to the high-energy transitions of many other sp…
Classification and environmental properties of X-ray selected point-like sources in the XMM-LSS field
Chiappetti, L.; Salvato, M.; Pierre, M. +8 more
Context. The XMM-Large Scale Structure survey, covering an area of 11.1 sq. deg., contains more than 6000 X-ray point-like sources detected with the XMM-Newton to a flux of 3 × 10-15 erg s-1 cm-2 in the [0.5-2] keV band. The vast majority of these sources have optical (CFHTLS), infrared (SWIRE IRAC and MIPS), near-…
HST FUV C iv observations of the hot DG Tauri jet
Schmitt, J. H. M. M.; Güdel, M.; Eislöffel, J. +4 more
Protostellar jets are tightly connected to the accretion process and regulate the angular momentum balance of accreting star-disk systems. The DG Tau jet is one of the best-studied protostellar jets and contains plasma with temperatures ranging over three orders of magnitude within the innermost 50 AU of the jet. We present new Hubble Space Telesc…
Astrometric reduction of Cassini ISS images of the Saturnian satellites Mimas and Enceladus
Charnoz, S.; Cooper, N. J.; Lainey, V. +2 more
Aims: We provide astrometric observations of two of Saturn's main satellites, Mimas and Enceladus, using high resolution Cassini ISS Narrow Angle Camera images.
Methods: We developed a simplified astrometric reduction model for Cassini ISS images as an alternative to the one proposed by the Jet Propulsion Labratory (JPL). The particular …
The NGC 1614 interacting galaxy. Molecular gas feeding a "ring of fire"
Gallagher, J. S.; Aalto, S.; König, S. +2 more
Minor mergers frequently occur between giant and gas-rich low-mass galaxies and can provide significant amounts of interstellar matter to refuel star formation and power active galactic nuclei (AGN) in the giant systems. Major starbursts and/or AGN result when fresh gas is transported and compressed in the central regions of the giant galaxy. This…
How does star formation proceed in the circumnuclear starburst ring of NGC 6951?
Hunt, L. K.; Schinnerer, E.; Emsellem, E. +3 more
Gas inflowing along stellar bars is often stalled at the location of circumnuclear rings, which form an effective reservoir for massive star formation and thus shape the central regions of galaxies. However, how exactly star formation proceeds within these circumnuclear starburst rings is the subject of debate. Two main scenarios for this process …
The occulting galaxy pair UGC 3995. Dust properties from HST and CALIFA data
Holwerda, B. W.; Keel, W. C.
UGC 3995 is an interacting and occulting galaxy pair. UGC 3995B is a foreground face-on spiral and UGC 3995A a bright background spiral with an AGN. We present analysis of the dust in the disc of UGC 3995B based on archival Hubble Space Telescope (HST) WFPC2 and PPAK IFU data from the CALIFA survey's first data release. From the HST F606W image, w…
Modelling the asymmetric wind of the luminous blue variable binary MWC 314
Jorissen, A.; Frémat, Y.; Lobel, A. +12 more
Aims: We present a spectroscopic analysis of MWC 314, a luminous blue variable (LBV) candidate with an extended bipolar nebula. The detailed spectroscopic variability is investigated to determine if MWC 314 is a massive binary system with a supersonically accelerating wind or a low-mass B[e] star. We compare the spectrum and spectral energy d…
Planck intermediate results. II. Comparison of Sunyaev-Zeldovich measurements from Planck and from the Arcminute Microkelvin Imager for 11 galaxy clusters
Böhringer, H.; Kneissl, R.; Dahle, H. +204 more
A comparison is presented of Sunyaev-Zeldovich measurements for 11 galaxy clusters as obtained by Planck and by the ground-based interferometer, the Arcminute Microkelvin Imager. Assuming a universal spherically-symmetric Generalised Navarro, Frenk and White (GNFW) model for the cluster gas pressure profile, we jointly constrain the integrated Com…
CO rotational line emission from a dense knot in Cassiopeia A. Evidence for active post-reverse-shock chemistry
Rho, Jeonghee; Black, John H.; Berné, Olivier +6 more
We report a Herschel detection of high-J rotational CO lines from a dense knot in the supernova remnant Cas A. Based on a combined analysis of these rotational lines and previously observed ro-vibrational CO lines, we find the gas to be warm (two components at ~400 and 2000 K) and dense (106-7 cm-3), with a CO column density …