SciPost Submission Page
Probing the Inflaton Potential with SKA
by Tanmoy Modak, Tilman Plehn, Lennart Röver, Björn Malte Schäfer
This is not the latest submitted version.
This Submission thread is now published as SciPost Phys. Core 5, 037 (2022)
|As Contributors:||Tanmoy Modak · Tilman Plehn · Lennart Röver|
|Date submitted:||2022-01-12 14:02|
|Submitted by:||Röver, Lennart|
|Submitted to:||SciPost Physics|
SKA will be a major step forward not only in astrophysics, but also in precision cosmology. We show how the neutral hydrogen intensity map can be combined with the Planck measurements of the CMB power spectrum, to provide a precision test of the inflaton potential. For a conservative range of redshifts we find that SKA can significantly improve current constraints on the Hubble slow-roll parameters.
Submission & Refereeing History
Published as SciPost Phys. Core 5, 037 (2022)
You are currently on this page
Reports on this Submission
Anonymous Report 1 on 2022-2-16 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202201_00008v1, delivered 2022-02-16, doi: 10.21468/SciPost.Report.4439
The author forecasted errors of general parameters appeared in inflation models, using future observations by SKA.
The way of their presentation would be highly unclear.
By adopting specifications of SKA, the authors forecasted possible future constraints on parameters in inflaton's potential. The author's attempt is very meaningful. However, I still have some questions as follows.
1) The authors used the existing constraints on the parameters obtained from Planck as a prior. However, we know there are some uncertainties even on choices for the values of the constraints. If the authors adopted the most milder bounds on them, how do the results change?
2) About uncertainties coming from the H0 tension, how did the authors resolve the problem in their choices for actual values of the free parameters?
3) Even for the ionization fraction of electron, chi, there should exists the corresponding spatial fluctuation. How did the author treat the chi's fluctuation in their analysis?
4) It seems that the authors assumed the constant slowroll parameters (or constant spectral index, the running, and the running-of-running, ...) as a function of the wave number (k). I think this is not realized in a concrete inflation model for relevant ranges of k observed by the SKA. I encourage the authors to discuss the validity for their methods in the text.
I encourage the authors to answer my questions written in my report.