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 ALMA (Cycle 0) band-6 and band-3 observations of the transitiondisk Sz\,91. The disk inclination and position angle are determined to be$i=49.5\degr\pm3.5\degr$ and $\mathrm{PA}=18.2\degr\pm3.5\degr$ and the dustyand gaseous disk are detected up to $\sim220$ au and $\sim400$ au from thestar, respectively. Most importantly, our continuum observations indicate thatthe cavity size in the mm-sized dust distribution must be $\sim97$ au inradius, the largest cavity observed around a T Tauri star. Our data clearlyconfirms the presence of \co(2-1) well inside the dust cavity. Based on theseobservational constrains we developed a disk model that simultaneously accountsfor the \co and continuum observations (i.e., gaseous and dusty disk).According to our model, most of the millimeter emission comes from a ringlocated between 97 and 140 au. We also find that the dust cavity is dividedinto an innermost region largely depleted of dust particles ranging from thedust sublimation radius up to 85 au, and a second, moderately dust-depletedregion, extending from 85 to 97 au. The extremely large size of the dustcavity, the presence of gas and small dust particles within the cavity and theaccretion rate of Sz\,91 are consistent with the formation of multiple (giant)planets.

Gas inside the 97 au cavity around the transition disk Sz\,91