APOGEE kinematics. I. Galactic bulge overview

DOI

We present the stellar kinematics across the Galactic bulge and into the disk at positive longitudes from the SDSS-III APOGEE spectroscopic survey of the Milky Way. APOGEE includes extensive coverage of the stellar populations of the bulge along the midplane and near-plane regions. From these data, we have produced kinematic maps of 10000 stars across longitudes of 0{deg}<l<65{deg}, and primarily across latitudes of |b|<5{deg} in the bulge region. The APOGEE data reveal that the bulge is cylindrically rotating across all latitudes and is kinematically hottest at the very center of the bulge, with the smallest gradients in both kinematic and chemical space inside the innermost region (|l,b|)<(5{deg},5{deg}). The results from APOGEE show good agreement with data from other surveys at higher latitudes and a remarkable similarity to the rotation and dispersion maps of barred galaxies viewed edge-on. The thin bar that is reported to be present in the inner disk within a narrow latitude range of |b|-0.5 have dispersion and rotation profiles that are similar to that of N-body models of boxy/peanut bulges. There is a smooth kinematic transition from the thin bar and boxy bulge (|l,b|)-1.0, and the chemodynamics across (l,b) suggests that the stars in the inner Galaxy with [Fe/H]>-1.0 originate in the disk.

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Identifier
DOI http://doi.org/10.26093/cds/vizier.18190002
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/819/2
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/819/2
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/819/2
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/819/2
Provenance
Creator Ness M.; Zasowski G.; Johnson J.A.; Athanassoula E.; Majewski S.R.,Garcia Perez A.E.; Bird J.; Nidever D.; Schneider D.P.; Sobeck J.,Frinchaboy P.; Pan K.; Bizyaev D.; Oravetz D.; Simmons A.
Publisher CDS
Publication Year 2016
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics