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

Deep optical photometric data on the NGC 7538 region were collected andcombined with archival data sets from $Chandra$, 2MASS and {\it Spitzer}surveys in order to generate a new catalog of young stellar objects (YSOs)including those not showing IR excess emission. This new catalog is completedown to 0.8 M$_\odot$. The nature of the YSOs associated with the NGC 7538region and their spatial distribution are used to study the star formationprocess and the resultant mass function (MF) in the region. Out of the 419YSOs, $\sim$91\% have ages between 0.1 to 2.5 Myr and $\sim$86\% have massesbetween 0.5 to 3.5 M$_\odot$, as derived by spectral energy distributionfitting analysis. Around 24\%, 62\% and 2\% of these YSOs are classified to bethe Class I, Class II and Class III sources, respectively. The X-ray activityin the Class I, Class II and Class III objects is not significantly differentfrom each other. This result implies that the enhanced X-ray surface flux dueto the increase in the rotation rate may be compensated by the decrease in thestellar surface area during the pre-main sequence evolution. Our analysis showsthat the O3V type high mass star `IRS 6' might have triggered the formation ofyoung low mass stars up to a radial distance of 3 pc. The MF shows a turn-offat around 1.5 M$_\odot$ and the value of its slope `$\Gamma$' in the mass range$1.5 <$M/M$_\odot < 6$ comes out to be $-1.76\pm0.24$, which is steeper thanthe Salpeter value.

The stellar contents and star formation in the NGC 7538 region