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VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261020T034815Z
LAST-MODIFIED:20190115T193526Z
DTSTART:20190118T183000Z
DTEND:20190118T193000Z
UID:event2063@bu.edu
URL:http://physics.bu.edu/internal/events/show/2063
SUMMARY:DESI Focal Plate Alignment and Galaxy Biases in BAO Measurements
DESCRIPTION:Featuring Duan Yutong\n\nPart of the Departmental Seminars.\n\n
	Dissertation Committee\n\n• Steve Ahlen (1st reader)\n• Martin Schmaltz
	 (2nd reader)\n• Alex Sushkov (committee chair)\n• Edward Kearns\n• D
	aniel Eisenstein\n\nAbstract: The baryon acoustic oscillation (BAO) feature
	 in the clustering of matter is a powerful tool to study large-scale struct
	ures of the universe. The Dark Energy Spectroscopic Instrument (DESI) will 
	use BAO as a standard ruler to map the expansion history of the universe an
	d constrain cosmological parameters. BU has played a significant role in th
	e manufacturing and integration of DESI focal plate structure\, and is cont
	ributing to understanding systematic uncertainties in the modelling and fit
	ting methods with state-of-the-art cosmological N-body simulations. After a
	 brief overview of the instrument and its science background\, I will prese
	nt the metrology-based approach to evaluating and aligning DESI focal plate
	 structure with complete results included\, as well as our ongoing investig
	ation into how galaxy biases in the observed galaxy distribution\, such as 
	assembly bias and velocity bias\, may shift the BAO measurements.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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