Search Publications
The chemodynamics of prograde and retrograde Milky Way stars
Kordopatis, Georges; Recio-Blanco, Alejandra; Hill, Vanessa +1 more
Context. The accretion history of the Milky Way is still unknown, despite the recent discovery of stellar systems that stand out in terms of their energy-angular momentum space, such as Gaia-Enceladus-Sausage. In particular, it is still unclear how these groups are linked and to what extent they are well-mixed.
Aims: We investigate the simila…
Discovery and characterization of the exoplanets WASP-148b and c. A transiting system with two interacting giant planets
Bouchy, F.; Deleuil, M.; Queloz, D. +39 more
We present the discovery and characterization of WASP-148, a new extrasolar system that includes at least two giant planets. The host star is a slowly rotating inactive late-G dwarf with a V = 12 magnitude. The planet WASP-148b is a hot Jupiter of 0.72 RJup and 0.29 MJup that transits its host with an orbital period of 8.80 d…
Separation between RR Lyrae and type II Cepheids and their importance for a distance determination: the case of omega Cen
Salaris, M.; Mateo, M.; Marinoni, S. +11 more
The separation between RR Lyrae (RRLs) and type II Cepheid (T2Cs) variables based on their period is debated. Both types of variable stars are distance indicators, and we aim to promote the use of T2Cs as distance indicators in synergy with RRLs. We adopted new and existing optical and near-infrared (NIR) photometry of ω Cen to investigate several…
First detection of 13CH in the interstellar medium
Wyrowski, Friedrich; Menten, Karl M.; Jacob, Arshia M. +3 more
In recent years, a plethora of observations with high spectral resolution of sub-millimetre and far-infrared transitions of methylidene (CH), conducted with Herschel and SOFIA, have demonstrated this radical to be a valuable proxy for molecular hydrogen that can be used for characterising molecular gas within the interstellar medium on a Galactic …
Edge collapse and subsequent longitudinal accretion in filament S242
Kim, Kee-Tae; Liu, Tie; Yuan, Jinghua +7 more
Filament S242 is 25 pc long with massive clumps and YSO clusters concentrated in its end regions; it is considered a good example of edge collapse. We mapped this filament in the 12CO(1-0) and 13CO(1-0) lines. A large-scale velocity gradient along filament S242 has been detected; the relative velocity between the two end-clum…
Searching for proto-planets with MUSE
Snellen, I. A. G.; Girard, J.; Brinchmann, J. +5 more
Context. Protoplanetary disks contain structures such as gaps, rings, and spirals, which are thought to be produced by the interaction between the disk and embedded protoplanets. However, only a few planet candidates are found orbiting within protoplanetary disks, and most of them are being challenged as having been confused with disk features.
An ultra-short period rocky super-Earth orbiting the G2-star HD 80653
Vanderburg, A.; Poretti, E.; Sozzetti, A. +26 more
Ultra-short period (USP) planets are a class of exoplanets with periods shorter than one day. The origin of this sub-population of planets is still unclear, with different formation scenarios highly dependent on the composition of the USP planets. A better understanding of this class of exoplanets will, therefore, require an increase in the sample…
Constraining the radial drift of millimeter-sized grains in the protoplanetary disks in Lupus
Williams, J. P.; Ansdell, M.; Facchini, S. +5 more
Context. Recent ALMA surveys of protoplanetary disks have shown that for most disks the extent of the gas emission is greater than the extent of the thermal emission of millimeter-sized dust. Both line optical depth and the combined effect of radially dependent grain growth and radial drift may contribute to this observed effect. To determine whet…
Multiplicity of the red supergiant population in the young massive cluster NGC 330
Lennon, D. J.; Herrero, A.; de Koter, A. +7 more
Context. The multiplicity properties of massive stars are one of the important outstanding issues in stellar evolution. Quantifying the binary statistics of all evolutionary phases is essential to paint a complete picture of how and when massive stars interact with their companions, and to determine the consequences of these interactions.
Aim…
The MUSE view of the planetary nebula NGC 3132
Monreal-Ibero, Ana; Walsh, Jeremy R.
Aims: Two-dimensional spectroscopic data for the whole extent of the NGC 3132 planetary nebula have been obtained. We deliver a reduced data-cube and high-quality maps on a spaxel-by-spaxel basis for the many emission lines falling within the Multi-Unit Spectroscopic Explorer (MUSE) spectral coverage over a range in surface brightness >100…