6533b7dbfe1ef96bd126f7e5

RESEARCH PRODUCT

CCD uvby-beta photometry of young open clusters. I. The double cluster h and chi Persei

Juan FabregatG. Capilla

subject

PhysicsNGC 869Astrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsPhotometric ; Stars ; Early-type ; Galaxy ; NGC 869 ; NGC 884AstrophysicsEarly-typeNGC 884PhotometricUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsStars:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Photometry (optics)StarsDistance modulusGalaxySpace and Planetary ScienceCluster (physics)UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]Open cluster

description

We present CCD uvby-beta photometry for stars in the nuclei of the young double cluster h and chi Persei. We find that the reddening is highly variable through the h Persei nucleus, increasing from west to east, with values ranging from E(b-y)=0.328+-0.022 in the western part to E(b-y)=0.465+-0.025 in the south-east. Towards chi Persei the reddening is fairly constant, with E(b-y)=0.398+-0.025. Both clusters share a common distance modulus of 11.7+-0.1 mag., and an age of log t=7.10+-0.05 years.

yearjournalcountryeditionlanguage
2002-01-01
10.1051/0004-6361:20021200http://arxiv.org/abs/astro-ph/0206060