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2025.12.19
The 60 years of cosmic microwave background radiation (1965-2025): where new physics may emerge?
The measurements of the cosmic microwave background radiation is the pillar of modern precision cosmology. In this talk, I will give a brief overview of the experimental evolution of the cosmic microwave background radiation and highlight its phenomenal success and distinctive challenges. I will also discuss the current outstanding questions in modern cosmology and the prospects of the emergenc...
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2025.12.16
Magnetohydrodynamic Seismology of the Corona of the Sun
Processes operating in the outer layers of the Sun’s atmosphere, the fully ionised, magnetically dominated plasma of the corona, remain one of the major unsolved puzzles in solar physics. Intensively debated research topics include the enigmatic problem of coronal heating; the rapid release of enormous amounts of magnetic energy in solar flares and coronal mass ejections; the microphysical mec...
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2025.12.15
Connecting the Dots: From Electrons to Planets
Most exoplanets likely begin life wrapped in hydrogen–helium envelopes that interact intensely with their molten or supercritical interiors for millions to billions of years. Yet, despite their pivotal role in shaping planetary formation, evolution, and atmospheric composition, our fundamental physical and chemical understanding of these interactions remains limited, in large part because they...
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2025.12.15
Plowing for physics with black holes
Black holes have become unique tools in the understanding of a plethora of phenomena in vastly different fronts. From understanding spectacularly energetic events in our universe, from gaining insights on potential new particles to unraveling seemingly unrelated phenomena through a firm grasp of their dynamics is key. In this talk, we will connect with several of these fronts highlighting some ...
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2025.12.08
Particle acceleration and emission in jets of microquasars and active galactic nuclei
The origin of cosmic rays (CRs) remains an open question. The CR spectrum is characterized by two significant breaks: the knee at ~3 PeV (PeV=1e15 eV) and the ankle at ~3 EeV (EeV=1e18 eV). It is widely accepted that ultra-high-energy cosmic rays (UHECRs) above the ankle originate from extragalactic sources, with the transition energy between galactic and extragalactic components lying between ...
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2025.12.03
The use of the quasar dataset on Cosmology: consequences and prospects
We try to find an optimized methodology to constrain the cosmological parameters using the quasar dataset. Quasars can be the potential cosmic probe that can fill up the gap between the farthest observed Type Ia Supernovae and the Cosmic Microwave Background CMB. Quasars can be observed to the highest redshift of z ≈ 7.1. It can give valuable insight into the tensions of the cosmological param...
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2025.12.08
Tracing Cosmic Evolution: From the CMB to the Web, the CGM, and Galactic Disks
This is the abstract: Understanding how galaxies form and evolve remains one of the central challenges in modern astrophysics. In this talk, I will present my research over the past decade on the multi-scale processes that govern galaxy formation, from the initial conditions imprinted in the cosmic microwave background to the assembly of galactic disks.I will show that the effect of the cosmic ...
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2025.12.03
Hunting for strong gravitational lenses with Euclid
Euclid is a class-M space mission by ESA launched in July 2023. In the course of its six years lifetime, it will observ ~14,000 sq. degrees of the extragalactic sky with the aim of understanding the nature of dark matter and dark energy combining multiple cosmological probes such as weak lensing and galaxy clusters. Being designed for accurate shape measurements from space and having a space re...
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2025.12.23
A new multiprobe analysis of modified gravity and evolving dark energy
Dark energy has attracted renewed attention since DESI reported a possible dynamical behavior crossing the cosmological constant boundary, favoring the (w0,wa) parametrization over a cosmological constant at more than 3\sigma. This apparent evolution is a manifestation of some discrepancies between DESI BAO, Planck CMB and supernovae measurements. An independent probe from DESI and SN is theref...
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2025.11.27
OJ 287: The Rosetta Stone of Supermassive Black-Hole Binaries
Recent observational campaigns and theoretical investigations strongly indicate the presence ofa spinning supermassive black hole binary that spirals in due to the emission ofnano-Hertz gravitational waves in bright blazar OJ 287.I will briefly describe these efforts while focusingon our August 2019 observations and their implications.Additionally, I will touch upon our ongoing efforts, relev...
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