Search Publications
Collisional modelling of the AU Microscopii debris disc
Krivov, A. V.; Löhne, T.; Marshall, J. P. +6 more
AU Microscopii's debris disc is one of the most famous and best-studied debris discs and one of only two resolved debris discs around M stars. We perform in-depth collisional modelling of the AU Mic disc including stellar radiative and corpuscular forces (stellar winds), aiming at a comprehensive understanding of the dust production and the dust a…
Revisiting INTEGRAL/SPI observations of 44Ti from Cassiopeia A
Diehl, Roland; Greiner, Jochen; Siegert, Thomas +1 more
Context. The 340-yr old supernova remnant Cassiopeia A, located at 3.4 kpc distance, is the best-studied young core-collapse supernova remnant. Nucleosynthesis yields in radioactive isotopes have been studied with different methods, in particular for production and ejection of 44Ti and 56Ni, which originate in the innermost r…
ROSINA/DFMS and IES observations of 67P: Ion-neutral chemistry in the coma of a weakly outgassing comet
Gunell, H.; Wurz, P.; Altwegg, K. +32 more
Context. The Rosetta encounter with comet 67P/Churyumov-Gerasimenko provides a unique opportunity for an in situ, up-close investigation of ion-neutral chemistry in the coma of a weakly outgassing comet far from the Sun.
Aims: Observations of primary and secondary ions and modeling are used to investigate the role of ion-neutral chemistry wit…
Large-scale dust jets in the coma of 67P/Churyumov-Gerasimenko as seen by the OSIRIS instrument onboard Rosetta
Jorda, L.; Lamy, P. L.; Lara, L. M. +54 more
Context. During the most recent perihelion passage in 2009 of comet 67P/Churyumov-Gerasimenko (67P), ground-based observations showed an anisotropic dust coma where jet-like features were detected at ~ 1.3 AU from the Sun. The current perihelion passage is exceptional as the Rosetta spacecraft is monitoring the nucleus activity since March 2014, w…
Dust models post-Planck: constraining the far-infrared opacity of dust in the diffuse interstellar medium
Miville-Deschênes, M. -A.; Boulanger, F.; Aniano, G. +5 more
Aims: We compare the performance of several dust models in reproducing the dust spectral energy distribution (SED) per unit extinction in the diffuse interstellar medium (ISM). We use our results to constrain the variability of the optical properties of big grains in the diffuse ISM, as published by the Planck collaboration.
Methods: We …
Galactic cold cores. IV. Cold submillimetre sources: catalogue and statistical analysis
Bernard, J. -P.; Falgarone, E.; Juvela, M. +17 more
Context. For the project Galactic cold cores, Herschel photometric observations were carried out as a follow-up of cold regions of interstellar clouds previously identified with the Planck satellite. The aim of the project is to derive the physical properties of the population of cold sources and to study its connection to ongoing and future star …
Ultra-deep catalog of X-ray groups in the Extended Chandra Deep Field South
Finoguenov, A.; Popesso, P.; Heymans, C. +22 more
Aims: We present the detection, identification and calibration of extended sources in the deepest X-ray dataset to date, the Extended Chandra Deep Field South (ECDF-S).
Methods: Ultra-deep observations of ECDF-S with Chandra and XMM-Newton enable a search for extended X-ray emission down to an unprecedented flux of 2 × 10-16 e…
Lepto-hadronic model for the broadband emission of Cygnus X-1
Romero, Gustavo E.; Pepe, Carolina; Vila, Gabriela S.
Context. Cygnus X-1 is a well-observed microquasar. Broadband observations at all wavelengths have been collected over the years. The origin of the MeV tail observed with COMPTEL and INTEGRAL is still under debate and it has mostly been attributed to the corona, although its high degree of polarization suggests that it is synchrotron radiation fro…
Herschel spectroscopic observations of the compact obscured nucleus in Zw 049.057
Veilleux, S.; Farrah, D.; van der Werf, P. P. +6 more
Context. The luminous infrared galaxy
Measuring star formation with resolved observations: the test case of M 33
Buat, V.; Boquien, M.; Braine, J. +15 more
Context. Measuring star formation on a local scale is important to constrain star formation laws. It is not clear yet, however, whether and how the measure of star formation is affected by the spatial scale at which a galaxy is observed.
Aims: We wish to understand the impact of the resolution on the determination of the spatially resolved st…