Search Publications
Missions
Journals
Publication Years
Improved strong lensing modelling of galaxy clusters using the Fundamental Plane: Detailed mapping of the baryonic and dark matter mass distribution of Abell S1063
Grillo, C.; Rosati, P.; Meneghetti, M. +6 more
Aims: From accurate photometric and spectroscopic information, we build the Fundamental Plane (FP) relation for the early-type galaxies of the cluster Abell S1063. We use this relation to develop an improved strong lensing model of the cluster, and we decompose the cluster's cumulative projected total mass profile into its stellar, hot gas, a…
The Mars system revealed by the Martian Moons eXploration mission
Montmessin, Franck; Leblanc, François; Vandaele, Ann Carine +21 more
Japan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration). In this study, we review the related works on the past climate of Mars, its evolution, and the present climate and weather to describe the scientific goals and strategies of the MMX mission regarding the evolution of the Martian surface…
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data
Gariazzo, Stefano; Archidiacono, Maria; Hannestad, Steen +4 more
We reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom. We perform a series of extensive analyses fitting various combinations of cosmic microwave background (CMB) data from Planck, the Atacama Cosmology Telescope (ACT) and the South …
The X-ray disc/wind degeneracy in AGN
Dauser, T.; Matzeu, G. A.; Parker, M. L. +4 more
Relativistic Fe K emission lines from accretion discs and from disc winds encode key information about black holes, and their accretion and feedback mechanisms. We show that these two processes can in principle produce indistinguishable line profiles, such that they cannot be disentangled spectrally. We argue that it is likely that in many cases b…
Cosmological model-independent measurement of cosmic curvature using distance sum rule with the help of gravitational waves
Zhang, Jing-Fei; Zhang, Xin; Wang, Bo +3 more
Although the cosmic curvature has been tightly constrained in the standard cosmological model using observations of cosmic microwave background anisotropies, it is still of great importance to independently measure this key parameter using only late-Universe observations in a cosmological model-independent way. The distance sum rule in strong grav…
First Hard X-Ray Imaging Results by Solar Orbiter STIX
Volpara, Anna; Massa, Paolo; Krucker, Säm +15 more
The Spectrometer/Telescope for Imaging X-rays (STIX) is one of six remote sensing instruments on-board Solar Orbiter. The telescope applies an indirect imaging technique that uses the measurement of 30 visibilities, i.e., angular Fourier components of the solar flare X-ray source. Hence, the imaging problem for STIX consists of the Fourier inversi…
The MMX rover: performing in situ surface investigations on Phobos
Michel, Patrick; Murdoch, Naomi; Zhang, Yun +22 more
The Japanese MMX sample return mission to Phobos by JAXA will carry a rover developed by CNES and DLR that will be deployed on Phobos to perform in situ analysis of the Martian moon's surface properties. Past images of the surface of Phobos show that it is covered by a layer of regolith. However, the mechanical and compositional properties of this…
The disturbed outer Milky Way disc
Chemin, Laurent; Bland-Hawthorn, Joss; Khanna, Shourya +9 more
The outer parts of the Milky Way's disc are significantly out of equilibrium. Using only distances and proper motions of stars from Gaia's Early Data Release 3, in the range |b| < 10°, 130° < ℓ < 230°, we show that for stars in the disc between around 10 and $14\, \mathrm{kpc}$ from the Galactic centre, vertical velocity is strongly depen…
Can high-redshift Hubble diagrams rule out the standard model of cosmology in the context of cosmography?
Pourojaghi, S.; Zabihi, N. F.; Malekjani, M.
Using mock data for the Hubble diagrams of type Ia supernovae (SNIa) and quasars (QSOs) generated based on the standard model of cosmology, and using the least-squares method based on the Markov-Chain-Monte-Carlo (MCMC) algorithm, we first put constraints on the cosmographic parameters in the context of the various model-independent cosmographic m…
A panchromatic view of infrared quasars: excess star formation and radio emission in the most heavily obscured systems
Calistro Rivera, Gabriela; Lapi, Andrea; Villforth, Carolin +13 more
To understand the active galactic nuclei (AGNs) phenomenon and their impact on the evolution of galaxies, a complete AGN census is required; however, finding heavily obscured AGNs is observationally challenging. Here we use the deep and extensive multiwavelength data in the COSMOS field to select a complete sample of 578 infrared (IR) quasars ($L_…