Search Publications
Hot subdwarfs in close binaries observed from space. I. Orbital, atmospheric, and absolute parameters, and the nature of their companions
Geier, S.; Pelisoli, I.; Schaffenroth, V. +2 more
Context. About a third of the hot subdwarfs of spectral type B (sdBs), which are mostly core-helium-burning objects on the extreme horizontal branch, are found in close binaries with cool, low-mass stellar, substellar, or white dwarf companions. They can show light variations due to different phenomena.
Aims: Many hot subdwarfs now have space…
Planet populations inferred from debris discs. Insights from 178 debris systems in the ISPY, LEECH, and LIStEN planet-hunting surveys
Gennaro, Mario; Launhardt, Ralf; Kennedy, Grant M. +11 more
We know little about the outermost exoplanets in planetary systems because our detection methods are insensitive to moderate-mass planets on wide orbits. However, debris discs can probe the outer-planet population because dynamical modelling of observed discs can reveal properties of perturbing planets. We use four sculpting and stirring arguments…
Substructure in the stellar halo near the Sun. I. Data-driven clustering in integrals-of-motion space
Koppelman, H. H.; Helmi, A.; Ruiz-Lara, T. +3 more
Context. Merger debris is expected to populate the stellar haloes of galaxies. In the case of the Milky Way, this debris should be apparent as clumps in a space defined by the orbital integrals of motion of the stars.
Aims: Our aim is to develop a data-driven and statistics-based method for finding these clumps in integrals-of-motion space fo…
Low-power jet-interstellar medium interaction in NGC 7319 revealed by JWST/MIRI MRS
Colina, L.; Hönig, S. F.; García-Burillo, S. +8 more
We present JWST/MIRI MRS spectroscopy of NGC 7319, the largest galaxy in the Stephan's Quintet, observed as part of the Early Release Observations (ERO). NGC 7319 hosts a type 2 active galactic nucleus (AGN) and a low-power radio jet (L1.4 GHz = 3.3 × 1022 W Hz−1) with two asymmetric radio hotspots at 430 pc (N2) a…
The first ground-level enhancement of solar cycle 25 on 28 October 2021
Usoskin, I.; Vainio, R.; Gieseler, J. +8 more
Aims: The first relativistic solar proton event of solar cycle 25 was detected on 28 October 2021 by neutron monitors (NMs) on the ground and particle detectors on board spacecraft in near-Earth space. This is the first ground-level enhancement (GLE) of the current cycle. A detailed reconstruction of the NM response together with the identifi…
GOODS-ALMA 2.0: Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching
Magnelli, B.; Daddi, E.; Elbaz, D. +38 more
Compact star formation appears to be generally common in dusty star-forming galaxies (SFGs). However, its role in the framework set by the scaling relations in galaxy evolution remains to be understood. In this work we follow up on the galaxy sample from the GOODS-ALMA 2.0 survey, an ALMA blind survey at 1.1 mm covering a continuous area of 72.42 …
Spi-OPS: Spitzer and CHEOPS confirm the near-polar orbit of MASCARA-1 b and reveal a hint of dayside reflection
Alonso, R.; Deleuil, M.; Erikson, A. +82 more
Context. The light curves of tidally locked hot Jupiters transiting fast-rotating, early-type stars are a rich source of information about both the planet and star, with full-phase coverage enabling a detailed atmospheric characterisation of the planet. Although it is possible to determine the true spin-orbit angle Ψ - a notoriously difficult para…
A3COSMOS: A census on the molecular gas mass and extent of main-sequence galaxies across cosmic time
Schinnerer, Eva; Liu, Daizhong; Kokorev, Vasily +6 more
Aims: We aim to constrain for the first time the mean mass and extent of the molecular gas of a mass-complete sample of normal > 1010 M⊙ star-forming galaxies at 0.4 < z < 3.6.
Methods: We apply an innovative uv-based stacking analysis to a large set of archival Atacama Large Millimeter/submillimeter Array …
Detection of the tidal deformation of WASP-103b at 3 σ with CHEOPS
Alonso, R.; Bouchy, F.; Deleuil, M. +80 more
Context. Ultra-short period planets undergo strong tidal interactions with their host star which lead to planet deformation and orbital tidal decay.
Aims: WASP-103b is the exoplanet with the highest expected deformation signature in its transit light curve and one of the shortest expected spiral-in times. Measuring the tidal deformation of th…
The star formation history of Upper Scorpius and Ophiuchus. A 7D picture: positions, kinematics, and dynamical traceback ages
Miret-Roig, N.; Bouy, H.; Alves, J. +3 more
Context. Understanding how star formation begins and propagates through molecular clouds is a fundamental but still open question. One major difficulty in addressing this question is the lack of precise 3D kinematics and age information for young stellar populations. Thanks to astrometry provided by Gaia, large spectroscopic surveys, and improved …