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 explore how dense filament widths, when measured using different molecularspecies, may change as a consequence of gas accretion toward the filament. As agas parcel falls into the filament, it will experience different density,temperature, and extinction values. The rate at which this environment changeswill affect differently the abundance of different molecules. So, a moleculethat forms quickly will better reflect the local physical conditions a gasparcel experiences than a slower-forming molecule. Since these differencesdepend on how the respective timescales compare, the different moleculardistributions should reflect how rapidly the environment changes, i.e., theaccretion rate toward the filament. We find that the filament widths measuredfrom time-dependent abundances for C2H, CO, CN, CS, and C3H2, are sensitive themost to this effect, being those molecules the ones presenting also the widerfilament widths. On the contrary, molecules such as N2H+, NH3, H2CO, HNC orCH3OH are not so sensitive to accretion and present the narrowest filamentwidths. We propose that ratios of filament widths for different tracers couldbe a useful tool to estimate the accretion rate onto the filament.

Different molecular filament widths as tracers of accretion onto filaments