Baryon-Dark matter interaction in presence of magnetic fields in light of EDGES signal

Show simple item record

dc.contributor.author Bhatt, Jitesh R.
dc.contributor.author Natwariya, Pravin Kumar
dc.contributor.author Nayak, Alekha C.
dc.contributor.author Pandey, Arun Kumar
dc.date.accessioned 2019-06-19T11:12:57Z
dc.date.available 2019-06-19T11:12:57Z
dc.date.issued 2019-05
dc.identifier.citation Bhatt, Jitesh R.; Natwariya, Pravin Kumar; Nayak, Alekha C. and Pandey, Arun Kumar, "Baryon-Dark matter interaction in presence of magnetic fields in light of EDGES signal", arXiv, Cornell University Library, DOI: arXiv:1905.13486, May 2019. en_US
dc.identifier.uri http://arxiv.org/abs/1905.13486
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/4526
dc.description.abstract The Experiment to Detect the Global Epoch of reionization Signature (EDGES) collaboration has reported an excess absorption dip in the 21 cm signal during cosmic dawn era. The stronger than expected 21 absorption signal indicates that gas was much cooler than the standard cosmological prediction. The observed 21-cm signal can be explained by decreasing the gas temperature via baryon-DM interaction. In this work, we study the temperature evolution of the gas and Dark Matter (DM) in the presence of magnetic fields. The magnetic heating via ambipolar diffusion and the turbulent decay increases both the gas and DM temperature at low redshift and this heating is more in the favour of baryons compared to DM. In the presence of strong magnetic field, a large baryon-DM interaction cross section is required to balance magnetic heating to explain the EDGES signal as compared to weak magnetic field. We also study the brightness temperature during the cosmic dawn era and put constraint on the strength of the magnetic field for a particular mass and baryon-DM cross section.
dc.description.statementofresponsibility by Jitesh R. Bhatt, Pravin Kumar Natwariya, Alekha C. Nayak and Arun Kumar Pandey
dc.language.iso en en_US
dc.publisher Cornell University Library en_US
dc.subject Cosmology en_US
dc.subject Nongalactic Astrophysics (astro-ph.CO) en_US
dc.title Baryon-Dark matter interaction in presence of magnetic fields in light of EDGES signal en_US
dc.type Preprint en_US


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


Browse

My Account