SIMBAD references

2017ApJ...836..202S - Astrophys. J., 836, 202-202 (2017/February-3)

A multi-epoch kinematic study of the remote dwarf spheroidal galaxy Leo II.

SPENCER M.E., MATEO M., WALKER M.G. and OLSZEWSKI E.W.

Abstract (from CDS):

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 ± 0.6 km s–1 with a velocity dispersion of 7.4 ± 0.4 km s–1. 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 ± 0.10 dex kpc–1 and have a mean metallicity of -1.70 ± 0.02 dex. There is also evidence of two different chemodynamic populations, but the signal is weak. A larger sample of stars would be necessary to verify this feature.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: abundances - galaxies: dwarf - galaxies: individual: Leo II - galaxies: kinematics and dynamics - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/ApJ/836/202): table1.dat table3.dat>

Nomenclature: Table 1: [SMW2017b] DDD.dddddd+DD.dddddd N=9309.

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 235

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2021.04.13-12:39:08

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