Further limits on disklike dark matter from K dwarf kinematics

Details Further limits on disklike dark matter from K dwarf kinematics Further limits on disklike dark matter from K dwarf kinematics

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372..125k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 372, May 1, 1991, p. 125-131.

Other

34

Dark Matter, Dwarf Stars, K Stars, Stellar Motions, Astronomical Models, Distribution Functions, Gravitational Effects, Milky Way Galaxy

Scientific paper

A sequence of model distribution functions is presented with which the vertical motions of nonisothermal stellar disk populations in the solar neighborhood can be modeled. In particular, constraints can be placed on the gravitational potential and the amount of dark matter in a disklike component. Using the observed kinematics of K dwarf stars in the solar vicinity combined with the falloff in space density away from the Galactic midplane, it is shown that there is no evidence for a mass discrepancy within about 160 pc of the Galactic plane. This finding complements the earlier result that the local disk surface density of the Galaxy is also consistent with an absence of dark matter in a disklike distribution in the solar neighborhood.

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