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| Query : 2014A&A...562A..41S |
2014A&A...562A..41S - Astronomy and Astrophysics, volume 562A41-41 (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
| 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 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NAME Galactic Center | reg | 17 45 39.60213 | -29 00 22.0000 | ~ | 16269 | 0 | |||||
| 2 | NAME Sgr I Window | reg | 17 56 | -29.0 | ~ | 71 | 0 | |||||
| 3 | NAME Baade Window | reg | 18 03.5 | -30 01 | ~ | 643 | 3 | |||||
| 4 | NGC 6558 | GlC | 18 10 17.6 | -31 45 50 | ~ | 265 | 0 | |||||
| 5 | NAME Plaut's Window | reg | 18 18 08.32 | -32 51 35.7 | ~ | 18 | 0 | |||||
| 6 | M 22 | GlC | 18 36 23.94 | -23 54 17.1 | ~ | 1459 | 0 | |||||
| 7 | NAME Galactic Bar | reg | ~ | ~ | ~ | 1458 | 0 | |||||
| 8 | NAME Galactic Bulge | reg | ~ | ~ | ~ | 4794 | 0 |
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