Periodic Pattern in the Residual-Velocity Field of OB Associations

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dc.creatorMel'nik, A. M.
dc.creatorDambis, A. K.
dc.creatorRastorguev, A. S.
dc.date2008-09-19
dc.date.accessioned2026-07-07T10:04:03Z
dc.date.available2026-07-07T10:04:03Z
dc.descriptionAn analysis of the residual-velocity field of OB associations within 3 kpc of the Sun has revealed periodic variations in the radial residual velocities along the Galactic radius vector with a typical scale length of lambda=2.0(+/-0.2) kpc and a mean amplitude of fR=7(+/-1) km/s. The fact that the radial residual velocities of almost all OB-associations in rich stellar-gas complexes are directed toward the Galactic center suggests that the solar neighborhood under consideration is within the corotation radius. The azimuthal-velocity field exhibits a distinct periodic pattern in the region 0<l<180 degrees, where the mean azimuthal-velocity amplitude is ft=6(+/-2) km/s. There is no periodic pattern of the azimuthal-velocity field in the region 180<l<360 degrees. The locations of the Cygnus arm, as well as the Perseus arm, inferred from an analysis of the radial- and azimuthal-velocity fields coincide. The periodic patterns of the residual-velocity fields of Cepheids and OB associations share many common features.
dc.description21 pages
dc.identifierhttps://arxiv.org/abs/0809.3381
dc.identifierhttp://arxiv.org/abs/0809.3381
dc.identifierAstronomy Letters, Vol. 27, No. 8, 2001, pp.521-533
dc.identifierdoi:10.1134/1.1388920
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169522
dc.subjectAstrophysics
dc.titlePeriodic Pattern in the Residual-Velocity Field of OB Associations
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