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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We carry out detailed photometric and kinematic study of the poorly studiedsparse open clusters SAI 44 and SAI 45 using ground based BVR$_{c}$I$_{c}$ datasupplemented by archival data from \textit{Gaia} eDR3 and Pan-STARRS. Thestellar membership are determined using a statistical method based on\textit{Gaia} eDR3 kinematic data and we found 204 members in SAI 44 while only74 members are identified in SAI 45. The average distances to SAI 44 and SAI 45are calculated as 3670$\pm$184 and 1668$\pm$47 pc. The logarithmic age of theclusters are determined as 8.82$\pm$0.10 and 9.07$\pm$0.10 years for SAI 44 andSAI 45, respectively. The color-magnitude diagram of SAI 45 hosts an extendedmain-sequence turn-off (eMSTO) which may be originated through differentialrotation rates of member stars. The mass function slopes are obtained as-1.75$\pm$0.72 and -2.58$\pm$3.20 in the mass rages 2.426-0.990 M$_{\odot}$ and2.167-1.202 M$_{\odot}$ for SAI 44 and SAI 45, respectively. SAI 44 exhibit thesignature of mass segregation while we found a weak evidence of the masssegregation in SAI 45 possibly due to tidal striping. The dynamical relaxationtimes of these clusters indicate that both the clusters are in dynamicallyrelaxed state. Using AD-diagram method, the apex coordinates are found to be(69$\fdg79\pm0\fdg11$, -30$\fdg82\pm0\fdg15$) for SAI 44 and(-56$\fdg22\pm0\fdg13$, -56$\fdg62\pm0\fdg13$) for SAI 45. The average spacevelocity components of the clusters SAI 44 and SAI 45 are calculated in unitsof km s$^{-1}$ as (-15.14$\pm$3.90, -19.43$\pm$4.41, -20.85$\pm$4.57) and(28.13$\pm$5.30, -9.78$\pm$3.13, -19.59$\pm$4.43), respectively.

Photometric and Kinematic study of the open clusters SAI 44 and SAI 45