2010/07/23 by A. Ciechanowska, Ciechanowska A., G. Pietrzyński +12
Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics of Galaxies (astro-ph.GA) #Bulge #Cepheid variable #Distance modulus #FOS: Physical sciences #Globular cluster #Infrared #Large Magellanic Cloud #Metallicity #Near-infrared spectroscopy #Photometry (optics) #Physics #Population #Small Magellanic Cloud #Star formation #Stars #Stellar population #Stellar, planetary, and galactic studies #Telescope #astro-ph.GA
paper · pdf · doi:10.48550/arxiv.1007.4217
Acta Astonomica in press
arxiv created 2010/07/23 · openalex publication_date 2010/07/23 · arxiv updated 2010/07/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have obtained deep near infrared J- and K-band observations of 14 BL Herculis and 5 W Virginis SMC stars from the OGLE III survey with the ESO New Technology Telescope equipped with the SOFI infrared camera. From these observations, period-luminosity (P-L) relations in the J and Ks 2MASS bands were derived. The slopes of the K and J band relations of -2.15 +- 0.19 and -1.95 +- 0.24, respectively, agree very well with the corresponding slopes derived previously for population II Cepheids in globular clusters, Galactic bulge and in the Large Magellanic Cloud. The distance modulus to the SMC obtained from our data using P-L relation derived for globular cluster Cepheids equals 18.85 +- 0.07 (statistical) +- 0.07 (systematic without including potential metallicity effect), which within the uncertainties agrees well with the results obtained with other methods.