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

Remarkable dust extinction features in the deep HST V and I images of theface-on Coma cluster spiral galaxy NGC 4921 show in unprecedented ways how rampressure strips the ISM from the disk of a spiral galaxy. New VLA HI maps showa truncated and highly asymmetric HI disk with a compressed HI distribution inthe NW, providing evidence for ram pressure acting from the NW. Where the HIdistribution is truncated in the NW region, HST images show a well-defined,continuous front of dust that extends over 90 degrees and 20 kpc. This dustfront separates the dusty from dust-free regions of the galaxy, and weinterpret it as galaxy ISM swept up near the leading side of the ICM-ISMinteraction. We identify and characterize 100 pc-1 kpc scale substructurewithin this dust front caused by ram pressure, including head-tail filaments,C-shaped filaments, and long smooth dust fronts. The morphology of thesefeatures strongly suggests that dense gas clouds partially decouple fromsurrounding lower density gas during stripping, but decoupling is inhibited,possibly by magnetic fields which link and bind distant parts of the ISM.

HST and HI Imaging of Strong Ram Pressure Stripping in the Coma Spiral NGC 4921: Dense Cloud Decoupling and Evidence for Magnetic Binding in the ISM