GBT14B-339

Redshift Space Distortions with 21 cm intensity mapping in cross-correlation

Abstract

We request the continuation of our ongoing survey for which we've already received 125 hours of telescope time (in semester 13B) of a 792 hour total request. With these additional 667 hours, we will expand our 21 cm intensity mapping program in the redshift range 0.58 < z < 1. In a recent publication, we demonstrated that sensitive measurements of neutral hydrogen can be achieved by cross-correlating
our intensity mapping data with the WiggleZ galaxy survey. The primary goal for the expanded program is to achieve the sensitivity and larger sky coverage necessary to measure the Kaiser redshift space distortions in cross-correlation with WiggleZ. This would enable a direct measurement of the neutral hydrogen density, Omega_HI, at z ~0.8 by breaking a degeneracy with the linear bias, b. The secondary goal will be to use the higher sensitivity and larger scan area to improve foreground cleaning and make a detection of the 21 cm signal in autocorrelation, without cross-correlating with the WiggleZ Survey. The requested telescope time will be used to observe two WiggleZ fields, one at 1 hr right ascension and one at 11 hr. We anticipate that the requested 667 hours will be spread over three semesters of observation.

Investigators

Name	Institution
Christopher Anderson *	Wisconsin at Madison, University of
Kiyoshi Masui	Massachusetts Institute of Technology; British Columbia, University of; Toronto, University of
Zuo Shifan	National Astronomical Observatories, CAS
Cheng-Yu Kuo	Virginia, University of; National Sun Yat-sen University
Hsiu-Hsien Lin	Toronto, University of; Carnegie Mellon University
Peter Timbie	Wisconsin at Madison, University of
Richard Bradley	National Radio Astronomy Observatory
Steve White	Green Bank Observatory
Maura McLaughlin	West Virginia University
Le Zhang	Wisconsin at Madison, University of
Tzu-Ching Chang	Academia Sinica
Kevin Bandura	West Virginia University; Carnegie Mellon University
Jeff Peterson	Carnegie Mellon University
Eric Switzer	Toronto, University of
xue-lei chen	Purple Mountain Observatory, CAS
Chris Blake	Swinburne University of Technology
Tabitha Voytek	Carnegie Mellon University
Sivasankaran Srikanth	National Radio Astronomy Observatory
Maura McLaughlin	West Virginia University
Niels Oppermann	Toronto, University of
Liviu-Mihai Calin	Toronto, University of
Brian Mason	National Radio Astronomy Observatory
Yichao Li	National Astronomical Observatories, CAS
Yu-Wei Liao	Academia Sinica
John Ford	Green Bank Observatory
J. Richard Shaw	Toronto, University of
Ue-Li Pen	Toronto, University of

* indicates the PI