VizieR Online Data Catalog: Star motions in the nuclear cluster of the MW (Fritz+, 2016)
Abstract
To derive the proper motions and determine the stellar density profile in the center (Rbox~20"), we use adaptive optics images with a resolution of ~0.080". In the central parsec, we use the same NACO/VLT images as described in Trippe et al. (2008A&A...492..419T) and Gillessen et al. (2009ApJ...692.1075G). We add images obtained in further epochs since then, in the 13mas/pixel scale matching the Gillessen et al. (2009ApJ...692.1075G) data set and in the 27mas/pixel scale extending the Trippe et al. (2008A&A...492..419T) data set.
To obtain proper motions outside the central parsec, we use adaptive optics images covering a larger field of view. These are four epochs of NACO/VLT images (2004 May 06, 2006 Apr 29, 2011 May 16 and 29), one epoch of MAD/CAMCAO (2008 Aug 21) at the VLT, and one epoch of Hokupa'a+Quirc (2000 Jul 02) Gemini North images (see Appendix A). Most images cover the Ks band. To obtain the structural properties of the nuclear cluster outside of the central Rbox=20", we use two additional data sets (HST WFC3/IR data and the public VISTA Variables in the Via Lactea Survey data obtained with VIRCAM (Saito et al. 2012A&A...537A.107S)). To obtain the spectra of the stars, we use data cubes obtained with the integral field spectrometer SINFONI. We use data with combined H+K-band (spectral resolution 1500) and K-band (spectral resolution 4000) grating. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- June 2016
- DOI:
- 10.26093/cds/vizier.18210044
- Bibcode:
- 2016yCat..18210044F
- Keywords:
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- Proper motions;
- Radial velocities;
- Milky Way;
- Photometry: infrared