Stromgren photometric survey in the Galactic anticenter direction

TL;DR

This study conducts a comprehensive Stromgren photometric survey in the Galactic anticenter to map the stellar density variation and analyze the Perseus spiral arm's structure using a large star catalog.

Contribution

It provides the first extensive catalog of Stromgren photometry in the anticenter, enabling detailed analysis of young stellar populations and Galactic structure.

Findings

Catalog of 35,974 stars with Stromgren indexes

Extended catalog of 96,980 stars with partial data

Data will help analyze stellar density and interstellar extinction

Abstract

Aims. The main purpose is to map the radial variation of the stellar space density for the young stellar population in the Galactic anticenter direction in order to understand the structure and location of the Perseus spiral arm. Methods. A uvbyHbeta Stromgren photometric survey covering 16sqrdeg in the anticenter direction was carried out using the Wide Field Camera at the Isaac Newton Telescope. This is the natural photometric system for identifying young stars and obtaining accurate estimates of individual distances and ages. The calibration to the standard system was undertaken using open clusters. Results. We present a main catalog of 35974 stars with all Stromgren indexes and a more extended one with 96980 stars with partial data. The central 8sqrdeg have a limiting magnitude of V<17m, while the outer region reaches V<15.5m. These large samples will permit us to analyze the stellar surface density variation associated to the Perseus arm also to study the properties of the stellar component and the interstellar extinction in the anticenter direction.