Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 468, Issue 2, Pages 1338-1348Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx449
Keywords
galaxies: dwarf; galaxies: kinematics and dynamics; Local Group; dark matter
Categories
Funding
- National Science Council of Taiwan [MOST 103-2112-M-002-020-MY3]
- National Science Council of Taiwan [MOST 103-2112-M-002-020-MY3]
Ask authors/readers for more resources
Although still under debate, observations generally suggest that dwarf spheroidal (dSph) galaxies exhibit large constant-density cores in the centres, which can hardly be explained by dissipationless cold dark matter simulations without baryonic feedback. Wave dark matter (psi DM), characterized by a single parameter, the dark matter particle mass m(psi), predicts a central soliton core in every galaxy arising from quantum pressure against gravity. Here we apply Jeans analysis assuming a soliton core profile to the kinematic data of eight classical dSphs so as to constrain m(psi), and obtain m(psi) = 1.18-(+0.28)(0.24) x 10(-22) and 1.79(-0.33)(+0.35) x 10(-22) eV(2 sigma) using the two different observational data sets of Walker et al. We show that the estimate of m(psi) is sensitive to the dSph kinematic data sets and is robust to various models of stellar density profile. We also consider multiple stellar subpopulations in dSphs and find consistent results. This mass rangeof m(psi) is in good agreement with other independent estimates, such as the high-redshift luminosity functions, the reionization history and the Thomson optical depth to the cosmic microwave background.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available