Search Publications
A multiwavelength analysis of the spiral arms in the protoplanetary disk around WaOph 6
Ménard, F.; Ginski, C.; Garufi, A. +23 more
Context. In recent years, protoplanetary disks with spiral structures have been detected in scattered light, millimeter continuum, and CO gas emission. The mechanisms causing these structures are still under debate. A popular scenario to drive the spiral arms is the one of a planet perturbing the material in the disk. However, if the disk is massi…
V-band photometry of asteroids from ASAS-SN. Finding asteroids with slow spin
Kochanek, C. S.; Stanek, K. Z.; Shappee, B. J. +3 more
We present V-band photometry of the 20 000 brightest asteroids using data from the All-Sky Automated Survey for Supernovae (ASAS-SN) between 2012 and 2018. We were able to apply the convex inversion method to more than 5000 asteroids with more than 60 good measurements in order to derive their sidereal rotation periods, spin axis orientations, and…
The baryon cycle of Seven Dwarfs with superbubble feedback
Madau, Piero; Mayer, Lucio; Mina, Mattia +3 more
We present results from a high-resolution, cosmological, ΛCDM simulation of a group of field dwarf galaxies with the "superbubble" model for clustered SN feedback, accounting for thermal conduction and cold gas evaporation. We compared our results to a previous simulation which has the same initial condition and galaxy formation physics (other tha…
Launching the asymmetric bipolar jet of DO Tau
Bacciotti, F.; Fedele, D.; Coffey, D. +5 more
Context. The role of bipolar jets in the formation of stars, and in particular how they are launched, is still not well understood.
Aims: We probe the protostellar jet launching mechanism using high-resolution observations of the near-infrared (IR) [Fe II]λ1.53,1.64 µm emission lines.
Methods: We consider the case of the bipolar je…
The far reaches of the β Pictoris debris disk
Janson, Markus; Brandeker, Alexis; Olofsson, Göran +1 more
The nearby young star β Pictoris hosts a rich and complex planetary system, with at least two giant planets and a nearly edge-on debris disk that contains several dynamical subpopulations of planetesimals. While the inner ranges of the debris disk have been studied extensively, less information is known about the outer, fainter parts of the disk. …
[C II] 158 µm line emission from Orion A I. A template for extragalactic studies?
Wolfire, M. G.; Teyssier, D.; Goicoechea, J. R. +10 more
Context. The [C II] 158 µm fine-structure line is one of the dominant coolants of the neutral interstellar medium. It is hence one of the brightest far-infrared (FIR) emission lines and can be observed not only in star-forming regions throughout the Galaxy, but also in the diffuse interstellar medium and in distant galaxies. [C II] line emis…
Spectro-imagery of an active tornado-like prominence: Formation and evolution
Barczynski, Krzysztof; Schmieder, Brigitte; Labrosse, Nicolas +3 more
Context. The dynamical nature of fine structures in prominences remains an open issue, including rotating flows in tornado prominences. While the Atmospheric Imaging Assembly imager aboard the Solar Dynamics Observatory allowed us to follow the global structure of a tornado-like prominence for five hours, the Interface Region Imaging Spectrograph,…
Modelling rebrightenings, reflares, and echoes in dwarf nova outbursts
Hameury, J. -M.; Lasota, J. -P.
Context. The disc instability model (DIM) accounts well for most of the observed properties of dwarf novae and soft X-ray transients, but the rebrightenings, reflares, and echoes occurring at the end of outbursts or shortly after in WZ Sge stars or soft X-ray transients have not yet been convincingly explained by any model.
Aims: We determine…
Mapping the "invisible" circumgalactic medium around a z ∼ 4.5 radio galaxy with MUSE
Lehnert, Matthew D.; De Breuck, Carlos; Wylezalek, Dominika +5 more
In this paper we present Multi Unit Spectroscopic Explorer integral field unit spectroscopic observations of the ∼70 × 30 kpc2 Lyα halo around the radio galaxy
Investigating point sources in MWC 758 with SPHERE
Ménard, F.; Pantin, E.; Ginski, C. +26 more
Context. Spiral arms in protoplanetary disks could be shown to be the manifestation of density waves launched by protoplanets and propagating in the gaseous component of the disk. At least two point sources have been identified in the L band in the MWC 758 system as planetary mass object candidates.
Aims: We used VLT/SPHERE to search for coun…