Search Publications
The rotation of planets hosting atmospheric tides: from Venus to habitable super-Earths
Mathis, S.; Laskar, J.; Correia, A. C. M. +1 more
The competition between the torques induced by solid and thermal tides drives the rotational dynamics of Venus-like planets and super-Earths orbiting in the habitable zone of low-mass stars. The resulting torque determines the possible equilibrium states of the planet's spin. Here we have computed an analytic expression for the total tidal torque …
Redshifted X-rays from the material accreting onto TW Hydrae: Evidence of a low-latitude accretion spot
Miceli, M.; Orlando, S.; Bonito, R. +3 more
Context. High resolution spectroscopy, providing constraints on plasma motions and temperatures, is a powerful means to investigate the structure of accretion streams in classical T Tauri stars (CTTS). In particular, the accretion shock region, where the accreting material is heated to temperatures of a few million degrees as it continues its inwa…
Inferring the photometric and size evolution of galaxies from image simulations. I. Method
Bertin, Emmanuel; Le Borgne, Damien; Carassou, Sébastien +1 more
Context. Current constraints on models of galaxy evolution rely on morphometric catalogs extracted from multi-band photometric surveys. However, these catalogs are altered by selection effects that are difficult to model, that correlate in non trivial ways, and that can lead to contradictory predictions if not taken into account carefully.
Ai…
Galaxy evolution in merging clusters: The passive core of the "Train Wreck" cluster of galaxies, A 520
Park, Byeong-Gon; Hwang, Narae; Hwang, Ho Seong +9 more
Aims: The mergers of galaxy clusters are the most energetic events in the Universe after the Big Bang. With the increased availability of multi-object spectroscopy and X-ray data, an ever increasing fraction of local clusters are recognised as exhibiting signs of recent or past merging events on various scales. Our goal is to probe how these …
An ALMA survey of submillimetre galaxies in the COSMOS field: The extent of the radio-emitting region revealed by 3 GHz imaging with the Very Large Array
Bondi, M.; Magnelli, B.; Aussel, H. +32 more
Context. The observed spatial scale of the radio continuum emission from star-forming galaxies can be used to investigate the spatial extent of active star formation, constrain the importance of cosmic-ray transport, and examine the effects of galaxy interactions.
Aims: We determine the radio size distribution of a large sample of 152 submill…
Search for aluminium monoxide in the winds of oxygen-rich AGB stars
Menten, K. M.; Olofsson, H.; Decin, L. +4 more
Context. Aluminium monoxide (AlO) is likely efficiently depleted from the gas around oxygen-rich evolved stars to form alumina (Al2O3) clusters and dust seeds. The presence of AlO gas in the extended atmospheres of evolved stars has been derived from optical spectroscopy. More recently, AlO gas was also detected at long wavel…
Ion acoustic waves at comet 67P/Churyumov-Gerasimenko. Observations and computations
Gunell, H.; Altwegg, K.; Glassmeier, K. -H. +15 more
Context. On 20 January 2015 the Rosetta spacecraft was at a heliocentric distance of 2.5 AU, accompanying comet 67P/Churyumov-Gerasimenko on its journey toward the Sun. The Ion Composition Analyser (RPC-ICA), other instruments of the Rosetta Plasma Consortium, and the ROSINA instrument made observations relevant to the generation of plasma waves i…
Relieving tensions related to the lensing of the cosmic microwave background temperature power spectra
Couchot, F.; Henrot-Versillé, S.; Perdereau, O. +4 more
The angular power spectra of the cosmic microwave background (CMB) temperature anisotropies reconstructed from Planck data seem to present "too much" gravitational lensing distortion. This is quantified by the control parameter AL that should be compatible with unity for a standard cosmology. With the class Boltzmann solver and the prof…
Gaia eclipsing binary and multiple systems. Two-Gaussian models applied to OGLE-III eclipsing binary light curves in the Large Magellanic Cloud
Audard, M.; Rimoldini, L.; Holl, B. +11 more
Context. The advent of large scale multi-epoch surveys raises the need for automated light curve (LC) processing. This is particularly true for eclipsing binaries (EBs), which form one of the most populated types of variable objects. The Gaia mission, launched at the end of 2013, is expected to detect of the order of few million EBs over a five-ye…
Expelled grains from an unseen parent body around AU Microscopii
Augereau, J. -C.; Boccaletti, A.; Sezestre, É. +1 more
Context. Recent observations of the edge-on debris disk of
Aims: We present a model aiming to reproduce the…