BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:The impact of 1/f noise on cosmological parameter constraints usin
 g SKA intensity mapping - Tianyu Chen (Jodrell Bank)
DTSTART:20190508T100000Z
DTEND:20190508T103000Z
UID:TALK124879@talks.cam.ac.uk
CONTACT:Will Handley
DESCRIPTION:In this talk\, I will report our recent study on the impact of
  1/f noise on constraining cosmological parameters using intensity mapping
  survey\, primarily with SKA1-MID Band 1.  We forecast constraints on cos
 mological parameters under the CPL mode using Fisher matrix.  Without 1/f 
 noise\, we project constraints on the dark energy equation of state with (
 w_0 = -1+/-0.04\, w_a = 0+/-0.11)\, and the HI mass bias b_HI = 1+/-0.02 f
 or SKA1-MID Band 1+ Planck.  A representative baseline 1/f noise model  
 degrades the measured HI power spectrum  by a factor of ~10 on average\, 
 with large variations in redshift and angular scales.  Consequently\, the 
 constraints on cosmological parameters are degraded by a factor of ~2.5. I
 n order to mitigate this\, one requires a minimised 1/f noise spectral slo
 pe\, a low knee frequency and a large telescope slew speed.  A correlatio
 n of 1/f noise in frequency space is also preferred.
LOCATION:Battcock Tea area
END:VEVENT
END:VCALENDAR