2014A&A...562A..41S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.15CEST04:54:40

2014A&A...562A..41S - Astronomy and Astrophysics, volume 562A, 41-41 (2014/2-1)

Proper motions for HST observations in three off-axis bulge fields.

SOTO M., ZEBALLOS H., KUIJKEN K., RICH R.M., KUNDER A. and ASTRAATMADJA T.

Abstract (from CDS):

This is the second in a series of papers that attempt to unveil the kinematic structure of the Galactic bulge through studying radial velocities and proper motions. We report here ∼15000 new proper motions for three low foreground-extinction off-axis fields of the Galactic bulge. Proper motions were derived from a combination of Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2) and Advanced Camera for Surveys (ACS) images taken 8 and 9 years apart, and they reach accuracies better than 0.9mas/yr for more than ∼10000 objects with magnitudes F814W≤24. The proper motion distributions in these fields are similar to those of Galactic minor axis bulge fields. We observe the rotation of main sequence stars below the turn-off within the Galactic bulge, as in the minor axis fields. Our stellar proper motions measurements show a significant bulge rotation for fields as far from the Galactic plane as b≃-8°.

Abstract Copyright:

Journal keyword(s): Galaxy: bulge - Galaxy: kinematics and dynamics - Galaxy: stellar content - methods: data analysis

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 10995 0
2 NAME Sgr I Window reg 17 56 -29.0           ~ 63 0
3 NAME Baade Window reg 18 03.5 -30 01           ~ 514 3
4 NGC 6558 GlC 18 10 18.38 -31 45 48.6   12.39 11.29     ~ 169 0
5 NAME Plaut's Window reg 18 18 08.32 -32 51 35.7           ~ 16 0
6 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1174 0
7 NAME Galactic Bar reg ~ ~           ~ 812 0
8 NAME Galactic Bulge reg ~ ~           ~ 3227 0

    Equat.    Gal    SGal    Ecl

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2019.10.15-04:54:40

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