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

We present results from an ISOCAM survey in the two broad band filters LW2(5-8.5 mu) and LW3 (12-18 mu) of a 0.13 square degree coverage of the SerpensMain Cloud Core. A total of 392 sources were detected in the 6.7 mu band and139 in the 14.3 mu band to a limiting sensitivity of ~ 2 mJy. Only about 50% ofthe mid-IR excess sources show excesses in the near-IR J-H/H-K diagram. In thecentral Cloud Core the Class I/Class II number ratio is 19/18, i.e. about 10times larger than in other young embedded clusters such as rho Ophiuchi orChamaeleon. The mid-IR fluxes of the Class I and flat-spectrum sources arefound to be on the average larger than those of Class II sources. Stellarluminosities are estimated for the Class II sample, and its luminosity functionis compatible with a coeval population of about 2 Myr which follows a threesegment power-law IMF. For this age about 20% of the Class IIs are found to beyoung brown dwarf candidates. The YSOs are in general strongly clustered, theClass I sources more than the Class II sources, and there is an indication ofsub-clustering. The sub-clustering of the protostar candidates has a spatialscale of 0.12 pc. These sub-clusters are found along the NW-SE oriented ridgeand in very good agreement with the location of dense cores traced bymillimeter data. The smallest clustering scale for the Class II sources isabout 0.25 pc, similar to what was found for rho Ophiuchi. Our data showevidence that star formation in Serpens has proceeded in several phases, andthat a ``microburst'' of star formation has taken place very recently, probablywithin the last 10^5 yrs.

The young stellar population in the Serpens Cloud Core: An ISOCAM survey