2015
DOI: 10.1103/physrevd.91.123543
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Dissipative dark matter explains rotation curves

Abstract: Dissipative dark matter, where dark matter particles interact with a massless (or very light) boson, is studied. Such dark matter can arise in simple hidden sector gauge models, including those featuring an unbroken U(1) ′ gauge symmetry, leading to a dark photon. Previous work has shown that such models can not only explain the LSS and CMB, but potentially also dark matter phenomena on small scales, such as the inferred cored structure of dark matter halos. In this picture, dark matter halos of disk galaxies … Show more

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Cited by 10 publications
(21 citation statements)
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References 87 publications
(160 reference statements)
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“…This improves upon previous work of [56] which used the gas density via a Kennicutt-Schmidt type relation. The resulting halo rotation curve then depends on only one parameter λ (assumed to be spatially independent as a zeroth order approximation) and tested against the full LITTLE THINGS sample of 26 dwarf galaxies.…”
Section: Resultssupporting
confidence: 61%
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“…This improves upon previous work of [56] which used the gas density via a Kennicutt-Schmidt type relation. The resulting halo rotation curve then depends on only one parameter λ (assumed to be spatially independent as a zeroth order approximation) and tested against the full LITTLE THINGS sample of 26 dwarf galaxies.…”
Section: Resultssupporting
confidence: 61%
“…These types of models are also consistent with other cosmological probes, such as δN ef f (BBN) and δN ef f (CMB) [63,41]. The small scale structure of dark matter, especially the dark matter distribution around galaxies, has been pursued in [39,64,65,66,67,41,42,56].…”
Section: Halo Profile From Dissipative Dark Mattermentioning
confidence: 54%
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“…This suggests that ∼ 25% of the energy budget would be carried away by χ. Given the astrophysical uncertainties associated to Supernova 1987A, exotic particles can carry away up to 50% of the total energy of the collapse [45,46]. This corresponds again roughly to a new cross section of similar magnitude as the SM one.…”
Section: Signals and Constraintsmentioning
confidence: 83%
“…A detailed analysis of such a scenario is beyond the scope of this project as it would require a significant extension of the Boltzmann equations given in Eq. (46). In such extension, the late-time entropy injection would be avoided.…”
Section: χ As Dark Matter Particlementioning
confidence: 99%