Publications details

This section collects scientific and technical publications using data from the Sardinia Radio Telescope (SRT) and papers describing the instrumentation, capabilities, and performance of the facility. These peer‑reviewed articles emphasize the scientific impact and engineering developments enabled by the SRT, highlighting its contribution to radio astronomy.

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The nature of the methanol maser ring G23.657-00.127. II. Expansion of the maser structure

Authors: A. Bartkiewicz, A. Sanna, M. Szymczak, L. Moscadelli, H.J. van Langevelde and P. Wolak
Astronomy

Ring-like distributions of the 6.7 GHz methanol maser spots at milliarcsecond scales represent a family of molecular structures of unknown origin associated with high-mass young stellar objects (HMYSOs). We studied G23.657-00.127, which has a nearly circular ring of the 6.7 GHz methanol masers, and is the most suitable target to test hypotheses on the origin of the maser rings. The European Very Long Baseline Interferometry Network (EVN) was used at three epochs spanning 10.3 yr to derive the spatio-kinematical structure of the 6.7 GHz methanol maser emission in the target. Interferometric data demonstrated that about one quarter of cloudlets show significant variability in their brightness, although the overall spectrum was non-variable in single-dish studies.

Published in Astronomy & Astrophysics, Volume 637, id.A15, 12 pp.