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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

In order to study the streaming motions of miras in the Solar neighborhood,we newly surveyed 379 red variables in the SiO maser lines at 42.821 and 43.122GHz with the Nobeyama 45m radio telescope. Accurate radial velocities wereobtained for 229 (220 new) detected stars. The sample is selected from opticalvariables found by new automated surveys: the Northern Sky Variability Surveyand the All Sky Automated Survey. The new sample consists of the "bluer"objects compared with those observed in the previous SiO surveys. The distancesto the objects are estimated using the period-luminosity relation, and they aremostly less than 3 kpc from the Sun. The longitude-velocity diagram revealsthree prominent groups of stars deviant from the circular Galactic rotationwith a flat rotation curve. In addition to the Hercules group of stars whichwas studied before, we found two new deviant groups: one toward the Perseus armand the other toward the Sagittarius arm. These two groups both exhibitanomalous motions toward the Galactic center, which seem to be consistent withthe noncircular motions of these spiral arms found in the recent VLBIproper-motion measurements for maser gas clumps.

Kinematics of Red Variables in the Solar Neighborhood I. Basic Data Obtained by an SiO Maser Survey