Search Publications
SN 2018bsz: A Type I superluminous supernova with aspherical circumstellar material
Spyromilio, J.; Gromadzki, M.; Galbany, L. +26 more
We present a spectroscopic analysis of the most nearby Type I superluminous supernova (SLSN-I), SN 2018bsz. The photometric evolution of SN 2018bsz has several surprising features, including an unusual pre-peak plateau and evidence for rapid formation of dust ≳200 d post-peak. We show here that the spectroscopic and polarimetric properties of SN 2…
Exoplanet X-ray irradiation and evaporation rates with eROSITA
Schwope, A.; Poppenhaeger, K.; Ilic, N. +1 more
High-energy irradiation is a driver for atmospheric evaporation and mass loss in exoplanets. This work is based on data from eROSITA, the soft X-ray instrument on board the Spectrum Roentgen Gamma mission, as well as on archival data from other missions. We aim to characterise the high-energy environment of known exoplanets and estimate their mass…
The relativistic solar particle event on 28 October 2021: Evidence of particle acceleration within and escape from the solar corona
Krucker, Säm; Dresing, Nina; Klein, Karl-Ludwig +6 more
Aims: We analyse particle, radio, and X-ray observations during the first relativistic proton event of solar cycle 25 detected on Earth. The aim is to gain insight into the relationship between relativistic solar particles detected in space and the processes of acceleration and propagation in solar eruptive events.
Methods: To this end, …
X-ray spectroscopic survey of highly accreting AGN
Bianchi, S.; Vignali, C.; Piconcelli, E. +14 more
Improving our understanding of the nuclear properties of high-Eddington-ratio (λEdd) active galactic nuclei (AGN) is necessary since at this regime the radiation pressure is expected to affect the structure and efficiency of the accretion disc-corona system. This may cause departures from the typical nuclear properties of low-λEdd<…
Physics of ULIRGs with MUSE and ALMA: The PUMA project. IV. No tight relation between cold molecular outflow rates and AGN luminosities
Rigopoulou, D.; Colina, L.; van der Werf, P. +11 more
We study molecular outflows in a sample of 25 nearby (z < 0.17, d < 750 Mpc) ultra-luminous infrared galaxy (ULIRG) systems (38 individual nuclei) as part of the Physics of ULIRGs with MUSE and ALMA (PUMA) survey, using ∼400 pc (0.1-1.0″ beam FWHM) resolution ALMA CO(2-1) observations. We used a spectro-astrometry analysis to identify high-v…
Spectroscopic evolution of very massive stars at Z = 1/2.5 Z⊙
Martins, F.; Palacios, A.
Context. Stars with masses in excess of 100 M⊙ are observed in the Local Universe, but they remain rare objects. Because of the shape of the mass function, they are expected to be present only in the most massive and youngest clusters. They may thus be formed in number in highly star-forming galaxies.
Aims: Very massive stars (VMSs…
Observation-based modelling of the energetic storm particle event of 14 July 2012
Lario, D.; Vainio, R.; Poedts, S. +6 more
Aims: We model the energetic storm particle (ESP) event of 14 July 2012 using the energetic particle acceleration and transport model named `PArticle Radiation Asset Directed at Interplanetary Space Exploration' (PARADISE), together with the solar wind and coronal mass ejection (CME) model named `EUropean Heliospheric FORcasting Information A…
The chemical signature of the Galactic spiral arms revealed by Gaia DR3
Schultheis, M.; Recio-Blanco, A.; de Laverny, P. +8 more
Taking advantage of the recent Gaia Data Release 3 (DR3), we mapped chemical inhomogeneities in the Milky Way's disc out to a distance of ∼4 kpc from the Sun, using different samples of bright giant stars. The samples were selected using effective temperatures and surface gravities from the GSP-Spec module, and they are expected to trace stellar p…
Gas condensation in brightest group galaxies unveiled with MUSE. Morphology and kinematics of the ionized gas
Godard, B.; Gaspari, M.; Babul, A. +18 more
The origin of the cold gas in central galaxies in groups is still a matter of debate. We present Multi-Unit Spectroscopic Explorer (MUSE) observations of 18 optically selected local (z ≤ 0.017) brightest group galaxies (BGGs) to study the kinematics and distribution of the optical emission-line gas. MUSE observations reveal a distribution of gas m…
The galaxy group NGC 507: Newly detected AGN remnant plasma transported by sloshing
Simionescu, A.; Brunetti, G.; Gastaldello, F. +15 more
Jets from active galactic nuclei (AGN) are known to recurrently enrich their surrounding medium with mildly relativistic particles and magnetic fields. Here, we present a detailed multi-frequency analysis of the nearby (z = 0.01646) galaxy group NGC 507. In particular, we present new high-sensitivity and high-spatial-resolution radio images in the…