Measurement of the baryonic acoustic oscillation scale in 21 cm intensity fluctuations during the reionisation era

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

10 pages, 4 figures. Version accepted for publication in MNRAS; analysis discusion and conclusions now focus on the sphericall

Scientific paper

It has recently been suggested that the power spectrum of redshifted 21cm fluctuations could be used to measure the scale of baryonic acoustic oscillations (BAOs) during the reionisation era. The resulting measurements are potentially as precise as those offered by the next generation of galaxy redshift surveys at lower redshift. However unlike galaxy redshift surveys, which in the linear regime are subject to a scale independent galaxy bias, the growth of ionised regions during reionisation is thought to introduce a strongly scale dependent relationship between the 21cm and mass power spectra. We use a semi-numerical model for reionisation to assess the impact of ionised regions on the precision and accuracy with which the BAO scale could be measured using redshifted 21cm observations. For a model in which reionisation is completed at z~6, we find that the constraints on the BAO scale are not systematically biased at z > 6.5. In this scenario, and assuming the sensitivity attainable with a low-frequency array comprising 10 times the collecting area of the Murchison Widefield Array, the BAO scale could be measured to within 1.5 per cent in the range 6.5 < z < 7.5.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Measurement of the baryonic acoustic oscillation scale in 21 cm intensity fluctuations during the reionisation era does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of the baryonic acoustic oscillation scale in 21 cm intensity fluctuations during the reionisation era, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the baryonic acoustic oscillation scale in 21 cm intensity fluctuations during the reionisation era will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-323148

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.