Farnik Nikakhtar

Department of Physics, Yale University, USA

Year 1 results of the Dark Energy Spectroscopic Instrument with a focus on Baryon Acoustic Oscillations 

Abstract: The Dark Energy Spectroscopic Instrument (DESI) collaboration is conducting a five-year redshift survey of 40 million extragalactic sources across 14,000 square degrees of the northern sky, up to a redshift of 4, using the Mayall 4-meter telescope at Kitt Peak National Observatory. One of its primary goals is to precisely and accurately measure the cosmic expansion history through measurements of baryon acoustic oscillations (BAO). In this talk, I will discuss the measurements from DESI’s first-year Baryon Acoustic Oscillations, utilizing the distributions of galaxies (and quasars) over a redshift range of 0.1-2. For the first time, the DESI team employed catalog-level blinding in the BAO analysis to prevent confirmation bias in determining the expansion history. The resultant aggregate precision of the DESI Year 1 BAO analysis surpasses that of all previous galaxy surveys combined, prior to DESI.

یکشنبه  9 اردیبهشت 1403، ساعت 17:00

Sunday 28 April 2024 – 17:00 Tehran Time

Hybrid Seminar

دانشکده فیزیک – آمفی تئاتر (تالار جناب) /Physics Department – Amphitheater  (Jenab Hall)   

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest