期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2019/07/045
关键词
dark matter experiments; dark matter theory; massive black holes
资金
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [713366]
- IFT Centro de Excelencia Severo Ochoa [SEV-2016-0597]
- Red Consolider MultiDark [FPA2017-90566-REDC]
- Spanish Agencia Estatal de Investigacion [PGC2018-095161-B-I00]
Measurements of the dynamical environment of supermassive black holes (SMBHs) are becoming abundant and precise. We use such measurements to look for ultralight dark matter (ULDM), which is predicted to form dense cores (solitons) in the centre of galactic halos. We search for the gravitational imprint of an ULDM soliton on stellar orbits near Sgr A* and by combining stellar velocity measurements with Event Horizon Telescope imaging of M87*. Finding no positive evidence, we set limits on the soliton mass for different values of the ULDM particle mass m. The constraints we derive exclude the solitons predicted by a naive extrapolation of the soliton-halo relation, found in DM-only numerical simulations, for 2 x 10(-20) eV less than or similar to m less than or similar to 8 x 10(-19) eV (from Sgr A*) and m less than or similar to 4 x 10(-22) eV (from M87*). However, we present theoretical arguments suggesting that an extrapolation of the soliton-halo relation may not be adequate: in some regions of the parameter space, the dynamical effect of the SMBH could cause this extrapolation to over-predict the soliton mass by orders of magnitude.
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