RR LYRAE IN XSTPS: THE HALO DENSITY PROFILE IN THE NORTH GALACTIC CAP

We present a catalog of RR Lyrae stars (RRLs) observed by the Xuyi Schmidt Telescope Photometric Survey (XSTPS). We find 318 candidates, derive distances to them, and estimate the detection efficiency. The majority of our candidates have more than 12 observations, and for these we are able to calcul...

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Bibliographic Details
Published in:The Astrophysical journal 2014-06, Vol.788 (2), p.1-14
Main Authors: Faccioli, L, Smith, M C, Yuan, H-B, Zhang, H-H, Liu, X-W, Zhao, H-B, Yao, J-S
Format: Article
Language:English
Subjects:
ACCOUNTING
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COLOR
Computational efficiency
Computing time
COVERINGS
CURRENTS
Density
DETECTION
DISTANCE
EFFICIENCY
Electronics
ESA
Estimates
Galactic halos
GALAXIES
LIMITING VALUES
Mathematical models
MINES
Photometry
PROBES
SKY
SPHERICAL CONFIGURATION
STARS
STREAMS
TELESCOPES
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Summary:We present a catalog of RR Lyrae stars (RRLs) observed by the Xuyi Schmidt Telescope Photometric Survey (XSTPS). We find 318 candidates, derive distances to them, and estimate the detection efficiency. The majority of our candidates have more than 12 observations, and for these we are able to calculate periods. These also allow us to estimate our contamination level, which we predict is between 30% and 40%. We consider non-spherical double power-law models of the halo density profile and again find agreement with literature data sets, although we have limited power to constrain the flattening due to our small survey area. Much tighter constraints will be placed by current and future wide-area surveys, most notably ESA's astrometric Gaia mission. Our analysis demonstrates that surveys with a limited number of epochs can effectively be mined for RRLs. Complete sample is provided as accompanying online material; as an example the first few entries of each electronic table are shown in the text.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/788/2/105