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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report the first detection of thermal water vapor emission in the 557 GHz,$1_{10} - 1_{01}$ ground state transition of ortho-H$_2$O toward VY CanisMajoris. In observations obtained with the Submillimeter Wave AstronomySatellite (SWAS), we measured a flux of $\sim 450 $Jy, in a spectrally resolvedline centered on a velocity $v_{LSR} = 25 $km s$^{-1}$ with a full width halfmaximum of $\sim 35$ km s$^{-1}$, somewhat dependent on the assumed line shape.We analyze the line shape in the context of three different radial outflowmodels for which we provide analytical expressions. We also detected a weaker557 GHz emission line from W Hydrae. We find that these and other H$_2$Oemission line strengths scale as suggested by Zubko and Elitzur (2000).Comment: Astrophysical Journal Letters, accepte

557 GH[CLC]z[/CLC] Observations of Water Vapor Outflow from VY Canis Majoris and W Hydrae