Weighing the Galactic disk using phase-space spirals II. Most stringent constraints on a thin dark disk using Gaia EDR3
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Weighing the Galactic disk using phase-space spirals II. Most stringent constraints on a thin dark disk using Gaia EDR3. / Widmark, A.; Laporte, C. F. P.; de Salas, P. F.; Monari, G.
I: Astronomy & Astrophysics, Bind 653, A86, 15.09.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Weighing the Galactic disk using phase-space spirals II. Most stringent constraints on a thin dark disk using Gaia EDR3
AU - Widmark, A.
AU - Laporte, C. F. P.
AU - de Salas, P. F.
AU - Monari, G.
PY - 2021/9/15
Y1 - 2021/9/15
N2 - Using the method that was developed in the first paper of this series, we measured the vertical gravitational potential of the Galactic disk from the time-varying structure of the phase-space spiral, using data from Gaia as well as supplementary radial velocity information from legacy spectroscopic surveys. For eleven independent data samples, we inferred gravitational potentials that were in good agreement, despite the data samples' varied and substantial selection e ffects. Using a model for the baryonic matter densities, we inferred a local halo dark matter density of 0.0085 +/- 0.0039 M(circle dot)pc(-3) = 0.32 +/- 0.15 GeV cm(-3). We were also able to place the most stringent constraint on the surface density of a thin dark disk with a scale height
AB - Using the method that was developed in the first paper of this series, we measured the vertical gravitational potential of the Galactic disk from the time-varying structure of the phase-space spiral, using data from Gaia as well as supplementary radial velocity information from legacy spectroscopic surveys. For eleven independent data samples, we inferred gravitational potentials that were in good agreement, despite the data samples' varied and substantial selection e ffects. Using a model for the baryonic matter densities, we inferred a local halo dark matter density of 0.0085 +/- 0.0039 M(circle dot)pc(-3) = 0.32 +/- 0.15 GeV cm(-3). We were also able to place the most stringent constraint on the surface density of a thin dark disk with a scale height
KW - Galaxy: kinematics and dynamics
KW - Galaxy: disk
KW - solar neighborhood
KW - astrometry
KW - SAGITTARIUS DWARF GALAXY
KW - MILKY-WAY DISK
KW - MATTER DENSITY
KW - INTERSTELLAR GAS
KW - STARS
KW - HALO
KW - PLANE
KW - WAVES
KW - SUBSTRUCTURE
KW - KINEMATICS
U2 - 10.1051/0004-6361/202141466
DO - 10.1051/0004-6361/202141466
M3 - Journal article
VL - 653
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A86
ER -
ID: 280231823