Search Publications
Multiphase feedback processes in the Sy2 galaxy NGC 5643
Rigopoulou, D.; Carrera, F. J.; García-Burillo, S. +11 more
We study the multiphase feedback processes in the central ∼3 kpc of the barred Seyfert 2 galaxy NGC 5643. We used observations of the cold molecular gas (ALMA CO(2-1) transition) and ionized gas (MUSE IFU optical emission lines). We studied different regions along the outflow zone, which extends out to ∼2.3 kpc in the same direction (east-west) as…
HOLISMOKES. VI. New galaxy-scale strong lens candidates from the HSC-SSP imaging survey
Suyu, S. H.; Cañameras, R.; Schuldt, S. +8 more
We have carried out a systematic search for galaxy-scale strong lenses in multiband imaging from the Hyper Suprime-Cam (HSC) survey. Our automated pipeline, based on realistic strong-lens simulations, deep neural network classification, and visual inspection, is aimed at efficiently selecting systems with wide image separations (Einstein radii θ
Empirical mass-loss rates and clumping properties of Galactic early-type O supergiants
Puls, J.; de Koter, A.; Sana, H. +7 more
Aims: We investigate the impact of optically thick clumping on spectroscopic stellar wind diagnostics in O supergiants and constrain wind parameters associated with porosity in velocity space. This is the first time the effects of optically thick clumping have been investigated for a sample of massive hot stars, using models which include a f…
The Rossiter-McLaughlin effect revolutions: an ultra-short period planet and a warm mini-Neptune on perpendicular orbits
Rebolo, R.; Zapatero Osorio, M. R.; Scandariato, G. +34 more
Comparisons of the alignment of exoplanets with a common host star and each other can be used to distinguish among concurrent evolution scenarios for the star and the planets. However, multi-planet systems usually host mini-Neptunes and super-Earths, whose sizes make orbital architecture measurements challenging. We introduce the Rossiter-McLaughl…
The properties of the AGN torus as revealed from a set of unbiased NuSTAR observations
Ajello, M.; Marchesi, S.; Torres-Albà, N. +4 more
The obscuration observed in active galactic nuclei (AGNs) is mainly caused by dust and gas distributed in a torus-like structure surrounding the supermassive black hole. However, the properties of the obscuring torus of an AGN in X-ray have not yet been fully investigated because of a lack of high-quality data and proper models. In this work, we p…
Modelling the He I triplet absorption at 10 830 Å in the atmospheres of HD 189733 b and GJ 3470 b
Sánchez-López, A.; López-Puertas, M.; Nagel, E. +16 more
Characterising the atmospheres of exoplanets is key to understanding their nature and provides hints about their formation and evolution. High resolution measurements of the helium triplet absorption of highly irradiated planets have been recently reported, which provide a new means of studying their atmospheric escape. In this work we study the e…
Magnetic helicity and energy budget around large confined and eruptive solar flares
Veronig, A. M.; Thalmann, J. K.; Gupta, M.
Context. In order to better understand the underlying processes and prerequisites for solar activity, it is essential to study the time evolution of the coronal magnetic field of solar active regions (ARs) associated with flare activity.
Aims: We investigate the coronal magnetic energy and helicity budgets of ten solar ARs around the times of…
HOLISMOKES. IV. Efficient mass modeling of strong lenses through deep learning
Halkola, A.; Suyu, S. H.; Cañameras, R. +4 more
Modeling the mass distributions of strong gravitational lenses is often necessary in order to use them as astrophysical and cosmological probes. With the large number of lens systems (≳105) expected from upcoming surveys, it is timely to explore efficient modeling approaches beyond traditional Markov chain Monte Carlo techniques that ar…
Weighing the Galactic disk using phase-space spirals. II. Most stringent constraints on a thin dark disk using Gaia EDR3
Monari, G.; de Salas, P. F.; Widmark, A. +1 more
Using the method that was developed in the first paper of this series, we measured the vertical gravitational potential of the Galactic disk from the time-varying structure of the phase-space spiral, using data from Gaia as well as supplementary radial velocity information from legacy spectroscopic surveys. For eleven independent data samples, we …
Large-amplitude variables in Gaia Data Release 2. Multi-band variability characterization
Audard, M.; Rimoldini, L.; Holl, B. +11 more
Context. Photometric variability is an essential feature that sheds light on the intrinsic properties of celestial variable sources, the more so when photometry is available in various bands. In this respect, the all-sky Gaia mission is particularly attractive as it collects, among other quantities, epoch photometry measured quasi-simultaneously i…