# UBVI and Ha Photometry of the h & chi Persei cluster

@article{Keller2001UBVIAH,
title={UBVI and Ha Photometry of the h \& chi Persei cluster},
author={Stefan C. Keller and Eva K. Grebel and Grant J. Miller and Kenneth M. Yoss},
journal={arXiv: Astrophysics},
year={2001}
}
• Published 10 April 2001
• Physics
• arXiv: Astrophysics
UBVI and Ha photometry is presented for 17319 stars in vicinity of the young double cluster h & chi Persei. Our photometry extends over a 37arcmin x 1arcdeg field centered on the association. We construct reddening contours within the imaged field. We find that the two clusters share a common distance modulus of 11.75$\pm$0.05 and ages of log age(yr) = 7.1$\pm$0.1. From the V-Ha colour, a measure of the Ha emission strength, we conduct a survey for emission line objects within the association…
THE X-RAY ENVIRONMENT DURING THE EPOCH OF TERRESTRIAL PLANET FORMATION: CHANDRA OBSERVATIONS OF h PERSEI
• Physics
• 2009
We describe Chandra/ACIS-I observations of the massive ~ 13-14 Myr-old cluster, h Persei, part of the famous Double Cluster (h and ? Persei) in Perseus. Combining the list of Chandra-detected sources
Discovery of Gas Accretion Onto Stars in 13 Myr old h and chi Persei
• Physics
• 2007
We report the discovery of accretion disks associated with ~ 13 Myr-old intermediate/low-mass stars in h and chi Persei. Optical spectroscopy of ~ 5000 stars in these clusters and a surrounding halo
A Photometric Method to Search for Be Stars in Open Clusters
• Physics
• 2005
We describe a technique to identify Be stars in open clusters using Stromgren b, y, and narrowband Hα photometry. We first identify the B-type stars of the cluster using a theoretical isochrone fit
Be Stars in Open Stellar Clusters
The current status of the problem of anomalous increases in the relative number of Be stars in young open stellar clusters is summarized in this article. The relative content of Be stars is shown to
Pulsating B-type stars in the young open cluster h Persei (NGC 869)
• Physics
• 2007
We announce the discovery of six β Cephei stars and many other variable stars in the young open cluster h Persei (NGC 869). The cluster seems to be very rich in variable B-type stars, similarly to

## References

Near-infrared and visual photometry of h and chi persei
• Physics
• 1984
Photometrie a bande large dans l'IR proche dans les bandes JHK (et parfois L' et M) de 82 etoiles de h et χ Per. On donne egalement la photometrie photoelectrique UBV de 24 etoiles dont seule la