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

This study extends to the structure of the Galaxy. Our main goal is to focuson the first spiral arm beyond the Perseus arm, often called the Cygnus arm orthe Outer Norma arm, by appraising the distributions of the masers near theCygnus arm. The method is to employ masers whose trigonometric distances weremeasured with accuracy. The maser data come from published literature, havingbeen obtained via the existing networks (US VLBA, the Japanese VERA, theEuropean VLBI, and the Australian LBA). The new results for Cygnus are split intwo groups: those located near a recent CO fitted global model spiral arm, andthose congregating within an interarm island located halfway between thePerseus arm and the Cygnus arm. Next, we compare this island with other similarinterarm objects near other spiral arms. Thus we delineate an interarm island(6 x 2 kpc) located between the two long spiral arms (Cygnus and Perseus arms);this is reminiscent of the small Local Orion arm (4 x 2 kpc) found earlierbetween the Perseus and Sagittarius arms, and of the old Loop (2 x 0.5 kpc)found earlier between the Sagittarius and Scutum arms. Various arm models arecompared, based on observational data (masers, HII regions, HI gas, youngstars, CO gas).

Interarm islands in the Milky Way -- the one near the Cygnus spiral arm