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2024.08.26

The stellar environment's influence on protoplanetary discs and planet formation

<p>Stars born in dense clusters often form binary systems, surrounded by circumbinary discs of gas and dust. Misalignments between these discs and the binary orbit are common during stellar evolution, driven by dissipation. My research, utilizing 3D hydrodynamical simulations, focuses on the evolution of highly misaligned circumbinary discs. I demonstrate that polar-aligned circumbinary discs are ...</p>

2024.08.19

Beyond Summary Statistics: Leveraging Generative Models for Field-Level Weak Lensing Analysis

<p>Current and future weak lensing surveys contain significant information about our universe. However, their optimal cosmological analysis is challenging, with traditional analyses often resulting in information loss due to reliance on summary statistics like two-point functions. While deep learning methods offer promise in capturing the complex non-linear features of these cosmological fields, t...</p>

2024.08.23

Role of dark matter halo angular momentum distribution on bar formation, evolution and dynamical friction

<p>In this study, we investigated the role of the inner halo&#39;s angular momentum distribution on bar formation and evolution processes. We performed a series of high-resolution N-body experiments with Milky Way-type disk galaxies. These models were initiated with similar disks but with varying inner halo angular momentum in the surrounding dark matter halo. The bar triggered earlier in the model wi...</p>

2024.08.16

Unveiling the Milky Way Dust Extinction Curve in 3D

<p>Despite the vital importance of interstellar dust to many areas of astronomy, its composition and properties are highly uncertain. The dust extinction curve (the relation of extinction vs. wavelength) depends on both the grain-size distribution and the chemistry of the dust, and is therefore a probe of dust properties. The dust extinction curve is typically characterized by R(V) ≡ A(V)/E(B − ...</p>

2024.07.02

New Results in Three-Dimensional Core-Collapse Supernova Theory

<p>The theory of core-collapse supernova (CCSN) has evolved significantly in the past few years with the help of &nbsp;long term 3D simulations. In this talk, I will present many new scientific results based on the large set of CCSN simulations calculated by the code Fornax, focusing on the important role of three dimensional effects. I will talk about theoretical observables such as explosion energy, ...</p>

2024.06.26

Revealing Dark Matter under the Lens

<p>Unveiling the true nature of Dark Matter (DM), which manifests itself only through gravity, is one of the principal quests in physics. Leading candidates for DM are weakly interacting massive particles (WIMPs) or ultralight bosons (axions), at opposite extremes in mass scales, that have been postulated by competing theories to solve deficiencies in the Standard Model of particle physics. Wherea...</p>

2024.06.24

Photoionization models with turbulent structures

<p>Turbulence features ubiquitously in the interstellar medium, especially in the high-redshift Universe. Photoionization models with turbulent ISM density fields can predict nebular emission lines more realistically than the former uniform density/pressure photoionization models. In this talk, we will briefly introduce a turbulent photoionization model grid created by the cutting-edge 3D Monte Ca...</p>

2024.07.03

Exoplanet atmospheres with high-resolution spectroscopy: chemistry, isotopes, and dynamics

<p>Exoplanet atmospheres with imprints from their history open an important avenue to trace the origin and evolution of planets. With high-dispersion spectroscopy, we can resolve atomic and molecular spectral features into unique forests of lines that serve as fingerprints for identifying different species and probing structures and dynamics of exoplanet atmospheres. I will talk about high-resolut...</p>

2024.05.23

Accreting massive black holes and a Czech UV space telescope

<p>Most galaxies comparable to or larger than the mass of the Milky Way host hot, X-ray emitting atmospheres and accreting supermassive black holes. &nbsp;Hot atmospheres and radio jets and lobes are the ingredients of radio-mechanical active galactic nucleus (AGN) feedback. At least half of the most massive early-type galaxies harbour multi-phase filamentary gas, which appears to result from the therm...</p>

2024.05.24

Cracking neutron star mysteries: Physics-driven insights into interior, surface, and exterior by X-ray Timing results

<p>The utilization of Pulse Profile modeling techniques could simultaneously provide measurements for Neutron star Mass Radius and offer insights into their hotspot distribution. Presently, these methodologies rely on meta models of the equation of state (EOS) and employ pure geometrical cap overlapping techniques to align with observational data. This presentation aims to showcase our recent resu...</p>