WIDG Seminar: Xinyi Chen, Yale University, “Reconstructing the BAO signal for cosmological analysis”

Tuesday Dec 17, 2019, 12:00 PM → 1:00 PM US/Eastern

WL 216

The baryon acoustic oscillation (BAO) technique is one of the most prominent probes of dark energy and will play a pivotal role in obtaining the tightest constraints on cosmology with the use of the large galaxy surveys in the next decade. However, the effect of structure growth in late-time universe washes out the acoustic peak in the matter correlation function. Reconstructing the BAO peak reverses the effects of non-linear evolution and reduces redshift-space distortions, increasing the precision and accuracy of these measurements. Reconstruction has been under development for about a decade since the first method, and there have been a number of alternative reconstruction algorithms proposed recently. I will present a comparison of these algorithms, quantifying their performance on simulated data, from the aspects of the reconstructed field, power spectrum, correlation function, and BAO fitting.
RSVP for lunch at https://tinyurl.com/widg-signup

widg121719.pdf