J/A+A/426/81ivo://CDS.VizieR/J/A+A/426/81doi:10.26093/cds/vizier.34260081CDSPaumard T.Maillard J.-P.Morris M.CDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frh-ii-regionsinfrared-sourcesWe have obtained BEAR spectro-imaging data of the Galactic Center HII region "Sgr A West", also known as the "Minispiral", in the hydrogen Brackett {gamma} line (2.166 microns). Through multi-component line fitting, we have decomposed this HII region into nine overlapping velocity structures, for which we have extracted the line flux and radial velocity maps. We have then fitted a set of Keplerian orbits onto the radial velocity map of the most extended structure (the "Northern Arm"), assuming that it was orbiting the central black hole candidate Sgr A*. This fit allows us to propose a three-dimensional kinematic model for this structure, which is hereby given as a set of FITS files. In this model, the central mass, its location in the field, and the distance to the Galactic Center are fixed: we use a mass of 3e6 solar masses and a distance of 8kpc; the pixel scale is 0.353 arcsec/pix, Sgr A* is considered to be located at pixel (59.2538, 38.9849) (IDL notation: (0, 0) is the center of the lower-left pixel, add 1 for FITS convention).2004A&A...426...81Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/426/81CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/426/81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/426/81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/426/81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/426/81https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/426/81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/426/81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefault