English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The spiral structure of the Milky Way is highly uncertain and is the subjectof much discussion nowadays. We present the first result from a program thatdetermines the properties of the Local spiral arm (LOA), together with a fulldescription of the program. In this context we have made a comprehensive studyof the young LOA open cluster NGC 2302, which includes a UBVRI photometricanalysis and determination of its kinematic properties - proper motion andradial velocity - and of its orbital parameters. We determined the mean PM ofNGC 2302 relative to the local field of disk stars, and, through a comparisonwith the UCAC4 catalog, we transformed this relative PM into an absolute one.Using medium-resolution spectroscopy of 26 stars in the field of NGC 2302, wederived its mean RV. Isochrone fits to the photometric diagrams allowed us todetermine the fundamental parameters of NGC 2302, including reddening,distance, and age. The kinematic data and derived distance allowed us todetermine the space motion of NGC 2302. This was done by adopting atime-independent, axisymmetric, and fully analytic gravitational potential forthe MW. We obtained an absolute PM for NGC 2302 of ($\mu_{\alpha}\cos\delta,\mu_{\delta}) = (-2.09,-2.11)$ mas/yr, with standard errors of 0.410and 0.400 mas/yr. The mean RV of NGC 2302 turned out to be 31.2 km/sec with astandard error of 0.7 km/sec. Isochrone fits displaced for this reddening andfor a distance modulus of (m-M)o = 10.69 indicate an age of log(t) = 7.90-8.00with a slight tendency toward the younger age. Inspection of the shape of theorbit of NGC 2302 and the resulting orbital parameters indicate that it is atypical population I object.

Insights into the properties of the Local (Orion) spiral arm. NGC 2302: First results and description of the program