Search Publications
Optical design of the multi-wavelength imaging coronagraph Metis for the solar orbiter mission
Heinzel, P.; Solanki, S. K.; Romoli, M. +31 more
This paper describes the innovative optical design of the Metis coronagraph for the Solar Orbiter ESA-NASA mission. Metis is a multi-wavelength, externally occulted telescope for the imaging of the solar corona in both the visible and ultraviolet wavelength ranges. Metis adopts a novel occultation scheme for the solar disk, that we named "inverse …
Thermal stability of winds driven by radiation pressure in super-Eddington accretion discs
Mehdipour, M.; Ness, J. -U.; Guainazzi, M. +7 more
Ultraluminous X-ray sources (ULXs) are mainly powered by accretion in neutron stars or stellar-mass black holes. Accreting at rates exceeding the Eddington limit by factors of a few up to hundreds, radiation pressure is expected to inflate the accretion disc, and drive fast winds that have in fact been observed at significant fractions of the spee…
Asymmetric surface brightness structure of caustic crossing arc in SDSS J1226+2152: a case for dark matter substructure
Miralda-Escudé, Jordi; Rigby, Jane R.; Bayliss, Matthew +6 more
We study the highly magnified arc SGAS J122651.3+215220 caused by a star-forming galaxy at zs = 2.93 crossing the lensing caustic cast by the galaxy cluster SDSS J1226+2152 (zl = 0.43), using Hubble Space Telescope observations. We report in the arc several asymmetric surface brightness features whose angular separations are …
Coevolution of black hole accretion and star formation in galaxies up to z = 3.5
Daddi, E.; Rodighiero, G.; Franceschini, A. +15 more
Aims: We study the coevolution between the black hole accretion rate (BHAR) and the star formation rate (SFR) in different phases of galaxy life: main-sequence star-forming galaxies, quiescent galaxies, and starburst galaxies at different cosmic epochs.
Methods: We exploited the unique combination of depth and area in the COSMOS field an…
Neutrino emission from an off-axis jet driven by the tidal disruption event AT2019dsg
Liu, Ruo-Yu; Wang, Xiang-Yu; Xi, Shao-Qiang
Recently, a high-energy muon neutrino event was detected in association with a tidal disruption event (TDE) AT2019dsg at the time about 150 days after the peak of the optical/UV luminosity. We propose that such an association could be interpreted as arising from hadronic interactions between relativistic protons accelerated in the jet launched fro…
Properties of Water Ice and Dust Particles in the Atmosphere of Mars During the 2018 Global Dust Storm as Inferred From the Atmospheric Chemistry Suite
Grigoriev, A.; Montmessin, F.; Fedorova, A. +6 more
The properties of Martian aerosols are an integral part of the planetary climatology. Global dust storms (GDS) significantly alter spatial and vertical distributions of dust and water ice aerosols and their microphysical properties. We explored the 2018/Martian year 34 GDS with the Atmospheric Chemistry Suite instrument onboard the ESA-Roscosmos T…
Evidence for Galactic disc RR Lyrae stars in the solar neighbourhood
Grebel, E. K.; Prudil, Z.; Kunder, A. +1 more
We present a kinematical study of 314 RR Lyrae stars in the solar neighbourhood using the publicly available photometric, spectroscopic, and Gaia DR2 astrometric data to explore their distribution in the Milky Way. We report an overdensity of 22 RR Lyrae stars in the solar neighbourhood at a pericentre distance of between 5 and 9 kpc from the Gala…
K2-111: an old system with two planets in near-resonance
Bouchy, F.; Rebolo, R.; Zapatero Osorio, M. R. +64 more
This paper reports on the detailed characterization of the K2-111 planetary system with K2, WASP, and ASAS-SN photometry, as well as high-resolution spectroscopic data from HARPS-N and ESPRESSO. The host, K2-111, is confirmed to be a mildly evolved (log g = 4.17), iron-poor ([Fe/H] = -0.46), but alpha-enhanced ([α/Fe]=0.27), chromospherically quie…
Connecting the metallicity dependence and redshift evolution of high-mass X-ray binaries
Fornasini, Francesca M.; Civano, Francesca; Suh, Hyewon
The integrated X-ray luminosity (LX) of high-mass X-ray binaries (HMXBs) in a galaxy is correlated with its star formation rate (SFR), and the normalization of this correlation increases with redshift. Population synthesis models suggest that the redshift evolution of LX/SFR is driven by the metallicity (Z) dependence of HMXB…
GIARPS High-resolution Observations of T Tauri stars (GHOsT). II. Connecting atomic and molecular winds in protoplanetary disks
Munari, U.; Alcalá, J. M.; Manara, C. F. +10 more
Context. Disk winds play a fundamental role in the evolution of protoplanetary systems. The complex structure and dynamics can be investigated through the emission of atomic and molecular lines detected in high-resolution optical/IR spectra of young stellar objects. Despite their great importance, however, studies connecting the atomic and molecul…