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 have upgraded the 60-cm radio survey telescope located in Nobeyama, Japan.We developed a new waveguide-type sideband-separating SIS mixer for thetelescope, which enables the simultaneous detection of distinct molecularemission lines both in the upper and lower sidebands. Over the RF frequencyrange of 205-240 GHz, the single-sideband receiver noise temperatures of thenew mixer are 40-100 K for the 4.0-8.0 GHz IF frequency band. The imagerejection ratios are greater than 10 dB over the same range. For the dual IFsignals obtained by the receiver, we have developed two sets of acousto-opticalspectrometers and a telescope control system. Using the new telescope system,we successfully detected the 12CO (J=2-1) and 13CO (J=2-1) emission linessimultaneously toward Orion KL in 2005 March. Using the waveguide-typesideband-separating SIS mixer for the 200 GHz band, we have initiated the firstsimultaneous 12CO (J=2-1) and 13CO (J=2-1) survey of the galactic plane as wellas large-scale mapping observations of nearby molecular clouds.

New 60-cm Radio Survey Telescope with the Sideband-Separating SIS Receiver for the 200 GHz Band