%0 Generic %1 safarzadeh2019ultralight %A Safarzadeh, Mohammadtaher %A Spergel, David N. %D 2019 %K tifr %T Ultra-light Dark Matter is Incompatible with the Milky Way's Dwarf Satellites %U http://arxiv.org/abs/1906.11848 %X The density profiles of dwarf galaxies are a highly varied set. If the dark matter is an Ultra-light particle such as axions, then simulations predict a distinctive and unique profile. If the axion mass is large enough to fit the ultra-faint dwarf (UFD) satellites($m10^-21$ eV), then the models do not fit the density profile of Fornax and Sculptor and are ruled out by more than $3-\sigma$ confidence. If the axion mass is in the mass range that can fit mass profiles of Fornax and Sculptor dwarf spheroidals, then its extended profile implies enormous masses ($\approx10^11-10^12M_ødot$) for the UFDs. These large masses for the UFDS are ruled out by more than $3-\sigma$ confidence by dynamical friction arguments. The tension would increase further considering star formation histories and stellar masses of the UFDs. Moreover, light mass axions are inconsistent with the sub-halo mass function in the Milky Way.

@misc{safarzadeh2019ultralight, abstract = {The density profiles of dwarf galaxies are a highly varied set. If the dark matter is an Ultra-light particle such as axions, then simulations predict a distinctive and unique profile. If the axion mass is large enough to fit the ultra-faint dwarf (UFD) satellites($m\gtrapprox 10^{-21}$ eV), then the models do not fit the density profile of Fornax and Sculptor and are ruled out by more than $3-\sigma$ confidence. If the axion mass is in the mass range that can fit mass profiles of Fornax and Sculptor dwarf spheroidals, then its extended profile implies enormous masses ($\approx10^{11}-10^{12}M_{\odot}$) for the UFDs. These large masses for the UFDS are ruled out by more than $3-\sigma$ confidence by dynamical friction arguments. The tension would increase further considering star formation histories and stellar masses of the UFDs. Moreover, light mass axions are inconsistent with the sub-halo mass function in the Milky Way.}, added-at = {2019-07-01T05:57:32.000+0200}, author = {Safarzadeh, Mohammadtaher and Spergel, David N.}, biburl = {https://www.bibsonomy.org/bibtex/28a1a9838d01a28d643d2ade05b315951/citekhatri}, description = {Ultra-light Dark Matter is Incompatible with the Milky Way's Dwarf Satellites}, interhash = {320251a14b5f52832e60f2e6b512a1f6}, intrahash = {8a1a9838d01a28d643d2ade05b315951}, keywords = {tifr}, note = {cite arxiv:1906.11848Comment: submitted to ApJ Letters}, timestamp = {2019-07-01T05:57:32.000+0200}, title = {Ultra-light Dark Matter is Incompatible with the Milky Way's Dwarf Satellites}, url = {http://arxiv.org/abs/1906.11848}, year = 2019 }