Search Publications
The Gaia-ESO Survey: Target selection of open cluster stars
Gilmore, G.; Bayo, A.; Jordi, C. +38 more
Context. The Gaia-ESO Survey (GES) is a public, high-resolution spectroscopic survey, conducted with the multi-object spectrograph Fibre Large Array Multi Element Spectrograph (FLAMES) on the Very Large Telescope (European Southern Observatory, ESO, Cerro Paranal, Chile) from December 2011 to January 2018. Gaia-ESO has targeted all the main stella…
Observational constraints on gas disc sizes in the protoplanetary discs of multiple systems in the Taurus region
Lodato, G.; Ménard, F.; van der Plas, G. +13 more
The formation of multiple stellar systems is a natural by-product of the star-formation process, and its impact on the properties of protoplanetary discs and on the formation of planets is not yet fully understood. To date, no detailed uniform study of the gas emission from a sample of protoplanetary discs around multiple stellar systems has been …
The gravitational field of X-COP galaxy clusters
Pointecouteau, E.; Eckert, D.; Ettori, S. +2 more
The mass profiles of massive dark matter halos are highly sensitive to the nature of dark matter and potential modifications of the theory of gravity on large scales. The Λ cold dark matter (CDM) paradigm makes strong predictions on the shape of dark matter halos and on the dependence of the shape parameters on halo mass, such that any deviation f…
The width of Herschel filaments varies with distance
Panopoulou, G. V.; Smith, R. J.; Ntormousi, E. +5 more
Context. Filamentary structures in nearby molecular clouds have been found to exhibit a characteristic width of 0.1 pc, as observed in dust emission. Understanding the origin of this universal width has become a topic of central importance in the study of molecular cloud structure and the early stages of star formation.
Aims: We investigate h…
Extragalactic fast X-ray transient candidates discovered by Chandra (2000-2014)
Bauer, F. E.; Brandt, W. N.; Xue, Y. Q. +7 more
Context. Extragalactic fast X-ray transients (FXRTs) are short flashes of X-ray photons of unknown origin that last a few seconds to hours.
Aims: Our ignorance about their physical mechanisms and progenitor systems is due in part to the lack of clear multiwavelength counterparts in most cases, because FXRTs have only been identified serendipi…
High D/H ratios in water and alkanes in comet 67P/Churyumov-Gerasimenko measured with Rosetta/ROSINA DFMS
Altwegg, K.; Berthelier, J. J.; Fuselier, S. A. +8 more
Context. Isotopic abundances in comets are key to understanding and reconstructing the history and origin of material in the Solar System. Data for deuterium-to-hydrogen (D/H) ratios in water are available for several comets. However, no long-term studies of the D/H ratio in water of a comet during its passage around the Sun have been reported thu…
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<…