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SUMMARY:Dr. Caner Ünal 'Explorations in the Cosmic and Particle Universe'
DTSTART:20261021T120000Z
DTEND:20261021T140000Z
DTSTAMP:20261023T145400Z
UID:indico-event-19@indico.itu.edu.tr
DESCRIPTION:Explorations in the Cosmic and Particle Universe\nDr. Caner Ü
 nal\nAbstractIn the first part of this talk\, I will discuss the phenomeno
 logy of axion-gauge field couplings during inflation through density pertu
 rbations and gravitational waves (GWs)\, connecting these mechanisms with 
 probes of small-scale inflationary perturbations via cosmic microwave back
 ground (CMB) spectral distortions and GW interferometers. In the second pa
 rt\, I will focus on probing light bosons—even if they constitute a subd
 ominant fraction of dark matter—across various mass regimes: $10^{-26}$ 
 to $10^{-23}\\text{ eV}$ via pulsar timing arrays\, up to $10^{-21}\\text{
  eV}$ via the halo mass function\, $10^{-21}$ to $10^{-17}\\text{ eV}$ via
  supermassive black hole superradiance\, and $10^{-21}$ to $[10^{21}]\\tex
 t{ eV}$ via primordial black hole superradiance. I will conclude by outlin
 ing immediate and long-term future research directions.Short BioCaner Üna
 l holds double-major B.S. degrees in Physics and Electrical & Electronics 
 Engineering from Middle East Technical University (METU). He earned his Ph
 .D. in Theoretical Cosmology and High Energy Physics from the University o
 f Minnesota under the supervision of Prof. Marco Peloso. Following his doc
 toral studies\, he conducted postdoctoral research with the CEICO group at
  the Czech Academy of Sciences in Prague\, and subsequently at Ben-Gurion 
 University as a recipient of both the Kreitman Postdoctoral Fellowship and
  IASH Excellence Fellowship. Currently\, he is a senior research fellow at
  METU. His research interests span early universe cosmology\, cosmological
  perturbations\, axion physics\, stochastic gravitational wave backgrounds
 \, primordial black holes\, high-energy astrophysics\, and black hole supe
 rradiance. He has authored works accumulating over 2\,000 citations (with 
 an average exceeding 117 citations per paper) and contributes as a theoris
 t to major international collaborations\, including NANOGrav (North Americ
 an Nanohertz Observatory for Gravitational Waves)\, the Square Kilometre A
 rray (SKA)\, and Cosmic Explorer (CE).\n\nhttps://indico.itu.edu.tr/event/
 19/
URL:https://indico.itu.edu.tr/event/19/
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