Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal

Details Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal

2010-05-21

arxiv.org/abs/1005.4057v1

Phys.Rev.D82:023006,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

11 pages, 14 figures, submitted to PRD

Scientific paper

Observations of the frequency dependence of the global brightness temperature of the redshifted 21 cm line of neutral hydrogen may be possible with single dipole experiments. In this paper, we develop a Fisher matrix formalism for calculating the sensitivity of such instruments to the 21 cm signal from reionization and the dark ages. We show that rapid reionization histories with duration delta z< 2 can be constrained, provided that local foregrounds can be well modelled by low order polynomials. It is then shown that observations in the range nu = 50 - 100 MHz can feasibly constrain the Lyman alpha and X-ray emissivity of the first stars forming at z = 15 - 25, provided that systematic temperature residuals can be controlled to less than 1 mK. Finally, we demonstrate the difficulty of detecting the 21 cm signal from the dark ages before star formation.

Affiliated with

Also associated with

No associations

Rating

Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal 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 Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-412407