First direct astrophysical constraints on dark matter interactions with
ordinary matter at very low velocities
D. Wadekar, and G. Farrar. (2019)cite arxiv:1903.12190Comment: 11 pages, 8 figures.
Abstract
We derive the first direct constraints on dark matter cross sections at very
low velocity, v $\approx$ 10 km/s, by requiring that the heating/cooling due to
DM interacting with gas in the Leo T dwarf galaxy not exceed the radiative
cooling rate of the gas. This gives strong direct limits on millicharged DM
with mass $łesssim$ 1 GeV, which close important gaps in the exclusion plots
and add to constraints on the recent EDGES 21 cm absorption anomaly. We also
set new bounds on ultra-light dark photon DM and on DM-electron interactions.
Combining equilibrium heating/cooling constraints from Leo T and robust
Galactic gas clouds, we improve the constraints on DM-baryon cross-sections for
arbitrary velocity dependences.
Description
First direct astrophysical constraints on dark matter interactions with ordinary matter at very low velocities
%0 Generic
%1 wadekar2019first
%A Wadekar, Digvijay
%A Farrar, Glennys R.
%D 2019
%K tifr
%T First direct astrophysical constraints on dark matter interactions with
ordinary matter at very low velocities
%U http://arxiv.org/abs/1903.12190
%X We derive the first direct constraints on dark matter cross sections at very
low velocity, v $\approx$ 10 km/s, by requiring that the heating/cooling due to
DM interacting with gas in the Leo T dwarf galaxy not exceed the radiative
cooling rate of the gas. This gives strong direct limits on millicharged DM
with mass $łesssim$ 1 GeV, which close important gaps in the exclusion plots
and add to constraints on the recent EDGES 21 cm absorption anomaly. We also
set new bounds on ultra-light dark photon DM and on DM-electron interactions.
Combining equilibrium heating/cooling constraints from Leo T and robust
Galactic gas clouds, we improve the constraints on DM-baryon cross-sections for
arbitrary velocity dependences.
@misc{wadekar2019first,
abstract = {We derive the first direct constraints on dark matter cross sections at very
low velocity, v $\approx$ 10 km/s, by requiring that the heating/cooling due to
DM interacting with gas in the Leo T dwarf galaxy not exceed the radiative
cooling rate of the gas. This gives strong direct limits on millicharged DM
with mass $\lesssim$ 1 GeV, which close important gaps in the exclusion plots
and add to constraints on the recent EDGES 21 cm absorption anomaly. We also
set new bounds on ultra-light dark photon DM and on DM-electron interactions.
Combining equilibrium heating/cooling constraints from Leo T and robust
Galactic gas clouds, we improve the constraints on DM-baryon cross-sections for
arbitrary velocity dependences.},
added-at = {2019-04-01T08:29:40.000+0200},
author = {Wadekar, Digvijay and Farrar, Glennys R.},
biburl = {https://www.bibsonomy.org/bibtex/2367aa9b175205ef3f547189fb07b7f60/citekhatri},
description = {First direct astrophysical constraints on dark matter interactions with ordinary matter at very low velocities},
interhash = {cd5c6ea463c870a601068ab172951b80},
intrahash = {367aa9b175205ef3f547189fb07b7f60},
keywords = {tifr},
note = {cite arxiv:1903.12190Comment: 11 pages, 8 figures},
timestamp = {2019-04-04T10:22:23.000+0200},
title = {First direct astrophysical constraints on dark matter interactions with
ordinary matter at very low velocities},
url = {http://arxiv.org/abs/1903.12190},
year = 2019
}