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Deciphering the Lyman α blob 1 with deep MUSE observations
Scarlata, Claudia; Hayes, Matthew; Herenz, Edmund Christian
Context. Lyman α blobs (LABs) are large-scale radio-quiet Lyman α (Lyα) nebula at high-z that occur predominantly in overdense proto-cluster regions. In particular, there is the prototypical SSA22a-LAB1 at z = 3.1, which has become an observational reference for LABs across the electromagnetic spectrum.
Aims: We want to understand the powerin…
Decoding the radial velocity variations of HD 41248 with ESPRESSO
Adibekyan, V.; Sousa, S. G.; Barros, S. C. C. +13 more
Context. Twenty-four years after the discoveries of the first exoplanets, the radial-velocity (RV) method is still one of the most productive techniques to detect and confirm exoplanets. But stellar magnetic activity can induce RV variations large enough to make it difficult to disentangle planet signals from the stellar noise. In this context, HD…
The WISSH quasars project. VII. The impact of extreme radiative field in the accretion disc and X-ray corona interplay
Fiore, F.; Marconi, A.; Vignali, C. +14 more
Hyper-luminous quasars (Lbol ≳ 1047 erg s-1) are ideal laboratories to study the interaction and impact of the extreme radiative field and the most powerful winds in the active galactic nuclei (AGN) nuclear regions. They typically exhibit low coronal X-ray luminosity (LX) compared to the ultraviolet (UV)…
The Influence of Spacecraft Charging on Low-Energy Ion Measurements Made by RPC-ICA on Rosetta
Stenberg Wieser, Gabriella; Wieser, Martin; Eriksson, Anders +2 more
Spacecraft charging is problematic for low-energy plasma measurements. The charged particles are attracted to or repelled from the charged spacecraft, affecting both the energy and direction of travel of the particles. The Ion Composition Analyzer (RPC-ICA) on board the Rosetta spacecraft is suffering from this effect. RPC-ICA was measuring positi…
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…