Kinematic study of the Leo II dwarf galaxy

DOI

We conducted a large spectroscopic survey of 336 red giants in the direction of the Leo II dwarf galaxy using Hectochelle on the Multiple Mirror Telescope, and we conclude that 175 of them are members based on their radial velocities and surface gravities. Of this set, 40 stars have never before been observed spectroscopically. The systemic velocity of the dwarf is 78.3+/-0.6km/s with a velocity dispersion of 7.4+/-0.4km/s. We identify one star beyond the tidal radius of Leo II but find no signatures of uniform rotation, kinematic asymmetries, or streams. The stars show a strong metallicity gradient of -1.53+/-0.10dex/kpc and have a mean metallicity of -1.70+/-0.02dex.

Cone search capability for table J/ApJ/836/202/table3 (Spectroscopic properties of stars in the direction of Leo II)

Cone search capability for table J/ApJ/836/202/table1 (Photometric properties of stars in the direction of Leo II)

Identifier
DOI http://doi.org/10.26093/cds/vizier.18360202
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/836/202
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/836/202
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/836/202
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/836/202
Provenance
Creator Spencer M.E.; Mateo M.; Walker M.G.; Olszewski E.W.
Publisher CDS
Publication Year 2017
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; Exoplanet Astronomy; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy