-
Anton Baushev (Joint Institute for Nuclear Research)28/08/2023, 15:00
Galaxy observations and N-body cosmological simulations produce conflicting dark matter halo density profiles for galaxy central regions. While simulations suggest a cuspy and universal profile (UDP) of this region, the majority of observations favor variable profiles with a core in the center. We investigate the convergency of standard N-body simulations, especially in the cusp region. We...
Go to contribution page -
Meriem Behiri28/08/2023, 15:00
Serendipitous H-ATLAS fields Observations of Radio Extragalactic Sources (SHORES, PI: Marcella Massardi) is a brand new survey 2.1 GHz performed with the Australia Telescope Compact Array (ATCA). It comprises 30 discontinuous fields covering a total area of 15 sq. deg in the Herschel-ATLAS Southern Galactic Pole region (see Eales+2010), centred in candidate lensed galaxies (Negrello+14). With...
Go to contribution page -
Claudia Muni28/08/2023, 15:25
The distribution of dark matter within halos can reveal key information about cosmology. Therefore, making the density profiles increasingly more precise is fundamental for the study of dark matter. We introduce a new dynamics-based method to calculate dark matter density profiles from halo simulations. Each particle in a snapshot is ‘smeared’ over its orbit to obtain a profile which is...
Go to contribution page -
Peter Berczik28/08/2023, 15:25
One of the possible pathways to the formation of a supermassive black hole (SMBH) is the hierarchical merging scenario. Central SMBHs at interacting and merging host galaxies are observed as SMBH candidates at different separations from hundreds of pc to mpc. One of the strongest SMBH merging candidates is the galaxy NGC7727, which was resolved with the high spatial resolution mode of the MUSE...
Go to contribution page -
Dr Rafal Wojaczynski (National Centre for Nuclear Research Warsaw)28/08/2023, 15:50
The DarkSide program already produced leading results for both the low mass ($M_{WIMP}<10GeV/c^2$) and high mass ($M_{WIMP}>100GeV/c^2$) dark-matter direct-detection searches with its primary DarkSide-50 detector. Operating since 2013, DarkSide-50 was a 50-kg-active-mass dual-phase Liquid Argon Time Projection Chamber (TPC), filled with low radioactivity argon from an underground source. The...
Go to contribution page -
Stefano Cristiani28/08/2023, 15:50
Studying the absorption lines along the lines of sight to bright high-z QSOs is an invaluable cosmological tool, providing insight into the intergalactic/circumgalactic medium, dark matter, big-bang nucleosynthesis and general relativity. I report here the recent results of the QUBRICS (QUasars as BRIght beacons for Cosmology in the Southern hemisphere) survey and high-resolution spectroscopy...
Go to contribution page -
Amandine Le Brun28/08/2023, 16:15
The dark matter halo sparsity, i.e. the ratio between spherical halo masses enclosing two different overdensities, provides a non-parametric proxy of the halo mass distribution which has been shown to be a sensitive probe of the cosmological imprint encoded in the mass profile of haloes hosting galaxy clusters. Mass estimations at several overdensities would allow for multiple sparsity...
Go to contribution page -
Valeria Grisoni28/08/2023, 16:15
In this talk, I will discuss the chemical evolution of the Milky Way in the light of the most recent observational data from Galactic surveys and missions. Indeed, we are in a golden era for this field of research thanks to the advent of large spectroscopic surveys and projects (e.g. Gaia-ESO, APOGEE, GALAH, LAMOST, AMBRE), which are enhanced by ESA Gaia mission. In this way, detailed stellar...
Go to contribution page -
Veronika Vodeb28/08/2023, 17:00
Numerous observations confirm the existence of dark matter at astrophysical and cosmological scales, yet the fundamental nature of this elusive component of our universe remains unknown. Theory and simulations of galaxy formation predict that dark matter should cluster on small scales in bound structures called sub-halos or clumps. Sub-halos are thought to be abundant in the Milky Way and can...
Go to contribution page -
Dr Drew Jamieson (Max Planck Institute for Astrophysics)28/08/2023, 17:00
Surveying the large-scale structure of the universe will yield an enormous amount of high quality data for constraining cosmology and potentially detecting new physics. However, extracting the maximum amount of information from this dataset and using it to its full potential requires fast and accurate methods of simulating cosmic structure formation in the nonlinear regime. Normally this is...
Go to contribution page -
Clemente Smarra28/08/2023, 17:25
Pulsar Timing Array experiments probe the presence of possible scalar/pseudoscalar ultralight dark matter particles through decade-long timing of an ensemble of galactic millisecond radio pulsars. With the second data release of the European Pulsar Timing Array, we focus on the most robust scenario, in which dark matter interacts only gravitationally with ordinary baryonic matter. Our results...
Go to contribution page -
Timo Kist28/08/2023, 17:25
The damping wing signature of high-redshift quasars in the intergalactic medium (IGM) provides a unique way of probing the history of reionization. Next-generation surveys will collect a multitude of spectra that call for powerful statistical methods to constrain the underlying astrophysical parameters such as the global IGM neutral fraction as tightly as possible. Inferring these parameters...
Go to contribution page -
Daniele Roselli28/08/2023, 17:50
We calculate the energy density and pressure of a scalar field after its decoupling from a thermal bath in the spatially flat Friedman- Lemaı̂tre-Robertson-Walker space-time, within the framework of quantum statistical mechanics. By using the density operator determined by the condition of local thermodynamic equilibrium, we calculate the mean value of the stress-energy tensor of a real scalar...
Go to contribution page -
DANIELE SORINI (Durham University)28/08/2023, 17:50
Understanding the effect of baryon-driven astrophysics on probes of large-scale structure is crucial to correctly interpret the increasingly precise data from ongoing surveys. The state-of-the-art cosmological hydrodynamic simulation, MillenniumTNG, represents a formidable tool in this respect. Combining a cosmologically representative volume of (740 cMpc)^3 and a mass resolution of ~3X10^7...
Go to contribution page
Choose timezone
Your profile timezone: