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2024.04.16

Modelling sub-millimetre emission from the cold circumgalactic medium around high redshift galaxies

<p>TBC</p>

2024.04.16

The 4MOST instrument and upcoming spectroscopic surveys

<p>The 4MOST consortium has been selected by the European Southern Observatory (ESO) to provide the ESO community with a fibre-fed spectroscopic survey facility on the VISTA telescope with a large enough field-of-view to survey a large frac­tion of the southern sky in a few years. The facility will be able to simultaneously obtain spectra of ~2400 objects distributed over an hexagonal field-of-vie...</p>

2024.04.15

X-ray emissions from the large scale structure of the Universe with an eROSITA focus

<p>I will present the maps of the large scale structure at soft X-ray wavelength obtained by eROSITA. I will discuss how the observed emission unravels the properties of the circum-galactic medium of our Milky-Way and nearby galaxies.Then I discuss what astrophysical and cosmological information is contained in the map subtended by X-ray detected clusters and Active galactic nuclei</p>

2024.04.19

SgrA∗ spin and mass estimates through the detection of an extremely large mass-ratio inspiral

<p>Estimating the spin of SgrA∗ is one of the current challenges we face in understanding the center of our Galaxy. In the present work, we show that detecting the gravitational waves (GWs) emitted by a brown dwarf inspiraling around SgrA∗ will allow us to measure the mass and the spin of SgrA∗ with unprecedented accuracy. Such systems are known as extremely large mass-ratio inspirals (XMRIs) a...</p>

2024.04.12

Dynamical Modelling of Galactic Kinematics using Neural Networks

<p>The advent of integral field data has revolutionised the study of galaxy evolution. A key component of this is dynamical modelling methods which have allowed for crucial insights to be made from kinematic data. Despite this importance, most dynamical models make a number of key assumptions which do not hold for real galaxies. At the same time, machine learning methods are becoming increasingly ...</p>

2024.04.02

Baryon Recycle in Disc Galaxy

<p>We utilize the public Gizmo code to simulate twelve galaxies from the NIHAO suite simulated with the ESF-Gasoline2 code, then compare the corresponding galaxies in the two simulations. We find that while both codes with the same initial conditions and large-scale environments can successfully produce similar disc galaxies, significant differences are still seen in many properties of the galaxie...</p>

2024.03.29

Kinematic Signatures of Circumbinary Discs: Spiral arms, Fast Flows, and Doppler Flips

<p>Kinematic studies of protoplanetary discs are becoming a valuable method for uncovering hidden companions. While there exists a substantial amount of literature on the understanding of planet-disc interactions and their observational implications, little attention has been made towards circumbinary discs. Using 3D hydrodynamical simulations post-processed with Monte Carlo radiative transfer, I ...</p>

2024.03.26

Primordial non-Gaussianity (PNG) and Its Detection by Cosmolgical Surveys

<p>The simplest single-field inflation models predict a nearly Gaussian distribution of primordial density perturbations. However, the non-Gaussianity of the primordial density field serves as a powerful probe into the physics of the early universe, especially when considering more complex inflation models. The Cosmic Microwave Background (CMB) bispectrum has provided the tightest constraint on th...</p>

2024.03.29

Dust Dynamics in Planet Formation Processes & Towards Multi-stage Studies

<p>Dust plays an important&nbsp;role in planet formation as they grow from micron sized grains to over Mm sized planets. The intermediate stage, to form km-sized planetesimals from mm-cm sized dust particles, has been found to be difficult. These mm-cm sized dust particles frequently distribute in ring-like structures in protoplanetary disks as revealed in ALMA observations. Here, I present a series of...</p>

2024.03.20

AGN selection and demographics: a new age with JWST/MIRI

<p>Completing the census of active galactic nuclei (AGN) activity is the key to study the build-up of supermassive black holes (SMBHs) and understand their relations with the host galaxy properties. Nevertheless, many AGNs are obscured by dust and gas, making the identification of such systems a challenging task even today. In this talk, I will present the first results on the AGN identifications ...</p>