Search Publications
Shockingly low water abundances in Herschel/PACS observations of low-mass protostars in Perseus
Fedele, D.; van Dishoeck, E. F.; Evans, N. J. +16 more
Context. Protostars interact with their surroundings through jets and winds impinging on the envelope and creating shocks, but the nature of these shocks is still poorly understood.
Aims: Our aim is to survey far-infrared molecular line emission from a uniform and significant sample of deeply-embedded low-mass young stellar objects (YSOs) in …
IPHAS and the symbiotic stars. III. New discoveries and their IR spectral energy distributions
Munari, U.; Corradi, R. L. M.; Santander-García, M. +5 more
Context. The IPHAS Hα survey provides a rich database to search for emission-line sources in the northern Galactic plane.
Aims: We are systematically searching for symbiotic stars in the Milky Way using IPHAS. Our final goal, a complete census of this class of objects in the Galaxy, is a fundamental figure for discussing their overall propert…
Monte Carlo modelling of the propagation and annihilation of nucleosynthesis positrons in the Galaxy
Jean, P.; Ferrière, K.; Alexis, A. +1 more
Aims: We want to estimate whether the positrons produced by the β+-decay of 26Al, 44Ti, and 56Ni synthesised in massive stars and supernovae are sufficient to explain the 511 keV annihilation emission observed in our Galaxy. Such a possibility has often been put forward in the past. In a previous st…
The wind of W Hydrae as seen by Herschel. II. The molecular envelope of W Hydrae
Waters, L. B. F. M.; Menten, K. M.; Blommaert, J. A. D. L. +18 more
Context. The evolution of low- and intermediate-mass stars on the asymptotic giant branch (AGB) is mainly controlled by the rate at which these stars lose mass in a stellar wind. Understanding the driving mechanism and strength of the stellar winds of AGB stars and the processes enriching their surfaces with products of nucleosynthesis are paramou…
CoRoT 223992193: A new, low-mass, pre-main sequence eclipsing binary with evidence of a circumbinary disk
Aigrain, S.; Bouvier, J.; Lendl, M. +12 more
We present the discovery of CoRoT 223992193, a double-lined, detached eclipsing binary, comprising two pre-main sequence M dwarfs, discovered by the CoRoT space mission during a 23-day observation of the 3 Myr old NGC 2264 star-forming region. Using multi-epoch optical and near-IR follow-up spectroscopy with FLAMES on the Very Large Telescope and …
Heating of the molecular gas in the massive outflow of the local ultraluminous-infrared and radio-loud galaxy 4C12.50
Falgarone, E.; Bremer, M.; Spinoglio, L. +5 more
We present a comparison of the molecular gas properties in the outflow vs. in the ambient medium of the local prototype radio-loud and ultraluminous-infrared galaxy 4C12.50 (IRAS 13451+1232), using new data from the IRAM Plateau de Bure Interferometer and 30 m telescope and from the Herschel space telescope. Previous H2 (0-0) S(1) and S…
The initial Gaia source list
Smart, R. L.; Nicastro, L.
Aims: We describe the production of the Initial Gaia Source List (IGSL) used both as the starting point for observation-matching in the Gaia data processing and as a comparison catalog to trigger early science alerts.
Methods: The IGSL was compiled from large scale public catalogs and a few specific catalogs provided by the Gaia Consorti…
Thermal infrared observations of asteroid (99942) Apophis with Herschel
Altieri, B.; Müller, T. G.; Kiss, C. +4 more
The near-Earth asteroid (99942) Apophis is a potentially hazardous asteroid. We obtained far-infrared observations of this asteroid with the Herschel Space Observatory PACS instrument at 70, 100, and 160 µm. These were taken at two epochs in January and March 2013 during a close-Earth encounter. These first thermal measurements of Apophis we…
Magnetic field and radiative transfer modelling of a quiescent prominence
Heinzel, P.; Schmieder, B.; Gunár, S. +3 more
Aims: The aim of this work is to analyse the multi-instrument observations of the June 22, 2010 prominence to study its structure in detail, including the prominence-corona transition region and the dark bubble located below the prominence body.
Methods: We combined results of the 3D magnetic field modelling with 2D prominence fine struc…
GTC spectra of z ≈ 2.3 quasars: comparison with local luminosity analogs
Sulentic, Jack W.; Marziani, Paola; Negrete, C. Alenka +3 more
Context. The advent of 8-10 m class telescopes for the first time makes it possible to compare in detail quasars with similar luminosity and very different redshifts.
Aims: We conducted a search for z-dependent gradients in line-emission diagnostics and derived physical properties by comparing, in a narrow bolometric luminosity range (log L ~…