Analysis of RR Lyrae Stars in the Northern Sky Variability Survey
| dc.creator | Kinemuchi, K. | |
| dc.creator | Smith, H. A. | |
| dc.creator | Wozniak, P. R. | |
| dc.creator | McKay, T. A. | |
| dc.creator | Collaboration., the ROTSE | |
| dc.date | 2006-06-05 | |
| dc.date.accessioned | 2026-07-07T11:25:39Z | |
| dc.date.available | 2026-07-07T11:25:39Z | |
| dc.description | We use data from the Northern Sky Variability Survey (NSVS), obtained from the first generation Robotic Optical Transient Search Experiment (ROTSE-I), to identify and study RR Lyrae variable stars in the solar neighborhood. We initially identified 1197 RRab (RR0) candidate stars brighter than the ROTSE median magnitude V = 14. Periods, amplitudes, and mean V magnitudes are determined for a subset of 1188 RRab stars with well defined light curves. Metallicities are determined for 589 stars by the Fourier parameter method and by the relationship between period, amplitude, and [Fe/H]. We comment upon the difficulties of clearly classifying RRc (RR1) variables in the NSVS dataset. Distances to the RRab stars are calculated using an adopted luminosity-metallicity relation with corrections for interstellar extinction. The 589 RRab stars in our final sample are used to study the properties of the RRab population within 5 kpc of the Sun. The Bailey diagram of period versus amplitude shows that the largest component of this sample belongs to Oosterhoff type I. Metal-rich ([Fe/H] > -1) RRab stars appear to be associated with the Galactic disk. Our metal-rich RRab sample may include a thin disk as well as a thick disk population, although the uncertainties are too large to establish this. There is some evidence among the metal-rich RRab stars for a decline in scale height with increasing [Fe/H], as was found by Layden (1995). The distribution of RRab stars with -1 < [Fe/H] < -1.25 indicates that within this metallicity range the RRab stars are a mixture of stars belonging to halo and disk populations. | |
| dc.description | 68 pages, 26 figures, 9 tables, accepted to AJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0606092 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0606092 | |
| dc.identifier | Astron.J.132:1202-1220,2006 | |
| dc.identifier | doi:10.1086/506198 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195576 | |
| dc.subject | Astrophysics | |
| dc.title | Analysis of RR Lyrae Stars in the Northern Sky Variability Survey | |
| dc.type | text |