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27 papers · 1 filter
Evaluating Gyrochronology on the Zero-Age-Main-Sequence: Rotation Periods in the Southern Open Cluster Blanco 1 from the KELT-South Survey
P. A. Cargile, D. J. James, J. Pepper +3
We report periods for 33 members of Blanco 1 as measured from KELT-South light curves, the first reported rotation periods for this benchmark zero-age-main-sequence open cluster. T…
All Weather Calibration of Wide Field Optical and NIR Surveys
David L. Burke, Abhijit Saha, Jenna Claver +7
The science goals for ground-based large-area surveys, such as the Dark Energy Survey, Pan-STARRS, and the Large Synoptic Survey Telescope, require calibration of broadband photome…
On the kinematic separation of field and cluster stars across the Bulge globular NGC 6528
E. P. Lagioia, A. P. Milone, P. B. Stetson +12
We present deep and precise multi-band photometry of the Galactic Bulge globular cluster NGC6528. The current dataset includes optical and near-infrared images collected with ACS/W…
Towards a better understanding of the distance scale from RR Lyrae variable stars: A case study for the inner halo globular cluster NGC 6723
Jae-Woo Lee, Mercedes Lopez-Morales, Kyeong-Soo Hong +3
We present BV photometry for 54 variables in the metal-rich inner halo globular cluster NGC6723. With the discovery of new RR Lyrae variables (RRLs), we obtain <P_ab> = 0.541 +/- 0…
The Solar Neighborhood XXXI: Discovery of an Unusual Red+White Dwarf Binary at ~25 Parsecs via Astrometry and UV Imaging
Wei-Chun Jao, Todd J. Henry, John P. Subasavage +4
We report the discovery of a nearby M5.0V dwarf at 24.6 pc, SCR 1848-6855, that is orbited by an unusual companion causing an astrometric perturbation of more than 200 milli-arcsec…
Measuring Metallicities with HST/WFC3 photometry
Teresa L. Ross, Jon Holtzman, Barbara J. Anthony-Twarog +4
We quantified and calibrated the metallicity and temperature sensitivities of colors derived from nine Wide Field Camera 3 (WFC3) filters aboard the Hubble Space Telescope using Da…