Dark matter local density determination: recent observations and future prospects
Publikation: Bidrag til tidsskrift › Review › Forskning › fagfællebedømt
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Dark matter local density determination : recent observations and future prospects. / de Salas, Pablo F.; Widmark, A.
I: Reports on Progress in Physics, Bind 84, Nr. 10, 104901, 05.10.2021.Publikation: Bidrag til tidsskrift › Review › Forskning › fagfællebedømt
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TY - JOUR
T1 - Dark matter local density determination
T2 - recent observations and future prospects
AU - de Salas, Pablo F.
AU - Widmark, A.
PY - 2021/10/5
Y1 - 2021/10/5
N2 - This report summarises progress made in estimating the local density of dark matter (rho(DM,circle dot)), a quantity that is especially important for dark matter direct detection experiments. We outline and compare the most common methods to estimate rho(DM,circle dot) and the results from recent studies, including those that have benefited from the observations of the ESA/Gaia satellite. The result of most local analyses coincide within a range of rho(DM,circle dot) similar or equal to 0.4-0.6GeVcm(-3) = 0.011-0.016M(circle dot)/pc(3), while a slightly lower range of rho(DM,circle dot) similar or equal to 0.3-0.5GeVcm(-3) = 0.008-0.013M(circle dot)/pc(3) is preferred by most global studies. In light of recent discoveries, we discuss the importance of going beyond the approximations of what we define as the ideal Galaxy (a steady-state Galaxy with axisymmetric shape and a mirror symmetry across the mid-plane) in order to improve the precision of rho(DM,circle dot) measurements. In particular, we review the growing evidence for local disequilibrium and broken symmetries in the present configuration of the Milky Way, as well as uncertainties associated with the galactic distribution of baryons. Finally, we comment on new ideas that have been proposed to further constrain the value of rho(DM,circle dot), most of which would benefit from Gaia's final data release.
AB - This report summarises progress made in estimating the local density of dark matter (rho(DM,circle dot)), a quantity that is especially important for dark matter direct detection experiments. We outline and compare the most common methods to estimate rho(DM,circle dot) and the results from recent studies, including those that have benefited from the observations of the ESA/Gaia satellite. The result of most local analyses coincide within a range of rho(DM,circle dot) similar or equal to 0.4-0.6GeVcm(-3) = 0.011-0.016M(circle dot)/pc(3), while a slightly lower range of rho(DM,circle dot) similar or equal to 0.3-0.5GeVcm(-3) = 0.008-0.013M(circle dot)/pc(3) is preferred by most global studies. In light of recent discoveries, we discuss the importance of going beyond the approximations of what we define as the ideal Galaxy (a steady-state Galaxy with axisymmetric shape and a mirror symmetry across the mid-plane) in order to improve the precision of rho(DM,circle dot) measurements. In particular, we review the growing evidence for local disequilibrium and broken symmetries in the present configuration of the Milky Way, as well as uncertainties associated with the galactic distribution of baryons. Finally, we comment on new ideas that have been proposed to further constrain the value of rho(DM,circle dot), most of which would benefit from Gaia's final data release.
KW - dark matter
KW - local dark matter density
KW - galactic astrophysics
KW - milky way
KW - SURFACE MASS DENSITY
KW - MILKY-WAY
KW - GALACTIC DISK
KW - ROTATION CURVE
KW - SOLAR NEIGHBORHOOD
KW - GAIA DR2
KW - STELLAR
KW - GALAXY
KW - HALO
KW - KINEMATICS
U2 - 10.1088/1361-6633/ac24e7
DO - 10.1088/1361-6633/ac24e7
M3 - Review
C2 - 34496352
VL - 84
JO - Reports on Progress in Physics
JF - Reports on Progress in Physics
SN - 0034-4885
IS - 10
M1 - 104901
ER -
ID: 281983765