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 Orion Nebula Cluster (ONC) is the nearest dense star-forming region at$\sim$400 pc away, making it an ideal target to study the impact of highstellar density and proximity to massive stars (the Trapezium) onprotoplanetary disk evolution. The OMC1 molecular cloud is a region of highextinction situated behind the Trapezium in which actively forming stars areshielded from the Trapezium's strong radiation. In this work, we survey disksat high resolution with ALMA at three wavelengths with resolutions of0.095\arcsec (3 mm; Band 3), 0.048\arcsec (1.3 mm; Band 6), and 0.030\arcsec(0.85 mm; Band 7) centered on radio Source I. We detect 127 sources, including15 new sources that have not previously been detected at any wavelength. 72sources are spatially resolved at 3 mm, with sizes from $\sim$8 - 100 AU. Weclassify 76 infrared-detected sources as foreground ONC disks and the remainderas embedded OMC1 disks. The two samples have similar disk sizes, but the OMC1sources have a dense and centrally concentrated spatial distribution,indicating they may constitute a spatially distinct subcluster. We find smallerdisk sizes and a lack of large (>75 AU) disks in both our samples compared toother nearby star-forming regions, indicating that environmental disktruncation processes are significant. While photoevaporation from nearbymassive Trapezium stars may account for the smaller disks in the ONC, theembedded sources in OMC1 are hidden from this radiation and thus must truncatedby some other mechanism, possibly dynamical truncation or accretion-drivencontraction.

Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA