Indirect and direct detection limits on dark matter from cold interstellar gas

Zihui Wang (NYU)
Friday, March 25, 2022 - 2:00pm to 3:00pm

I will discuss the recent ongoing program of using cold interstellar gas as a natural laboratory for dark matter detection. Cold interstellar gas has been found in two types of gas systems, 1) cold gas clouds in Milky Way like galaxies and 2) gas-rich dwarf galaxies outside the virial radius of the host. Being intrinsically cold and low-metallicity, these gas systems can be used to place strong constraints on scenarios where dark matter can inject heat to the gas. Based on this argument, I will show limits on dark matter decay/annihilation, dark matter-baryon scattering, and dynamical friction of compact dark matter objects.

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