2010/02/19 by G. Maciejewski, Ł. Bukowiecki, L. Bukowiecki
Physics and Astronomy · #Astro and Planetary Science #Astrophysics #Astrophysics and Star Formation Studies #Cluster (spacecraft) #Computer science #Galaxy #Mass segregation #Open cluster #Physics #RADIUS #Stars #Stellar classification #Stellar, planetary, and galactic studies #astro-ph.GA
paper · pdf · doi:10.1002/asna.200911338
published in Astronomische Nachrichten 331(3), 312-322 (Wiley)
arxiv created 2010/02/19 · openalex publication_date 2010/03/01 · arxiv updated 2015/05/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract We present a photometric and spectroscopic study of the poorly investigated open cluster Trumpler 3. Basic parameters such as the age of 70 ± 10 Myr, the color excess E ( B – V ) = 0.30 ± 0.02 mag, the distance of 0.69 ± 0.03 kpc and the limiting radius of 12′ were redetermined and compared with previous preliminary studies. The distance of 0.65 ± 0.09 kpc was determined independently by spectral parallaxes. Simultaneously, our analysis allowed us to estimate a total number of members to be N tot = 570 ± 90 and a total mass of the cluster to be M tot = 270 ± 40 M ⊙ . We also determined a state of cluster's dynamical evolution. We conclude that Trumpler 3 is a young low‐massive stellar ensemble with a typical mass function slope, located near to the outer edge of the Galaxy's Orion Spur. As a result of a wide‐field search for short period variable stars, 24 variables were discovered in the cluster's area. Only one of them – a variable of the γ ‐Dor type – was found to be a likely cluster member (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)