Open AccessThe population in the background of open clusters: tracer of the Norma‐Cygnus arm
Author(s) -
Pandey A. K.,
Sharma S.,
Ogura K.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.11015.x
Subject(s) - physics , astrophysics , open cluster , astronomy , galactic plane , magnitude (astronomy) , population , range (aeronautics) , stars , medicine , materials science , environmental health , composite material
We present colour–magnitude diagrams of open clusters, located in the range 112° < l < 252° , manifesting stellar populations in the background of clusters. Some of the populations are found to be located beyond the Perseus arm and may be the part of the Norma‐Cygnus (outer) arm. The outer arm seems to be continued from l ∼ 120° to ∼235°. The background populations follow the downward warp of the Galactic plane around l ∼ 240° .