Browsing by Subject "stars: formation"
Now showing items 1-4 of 4
-
An investigation into maser variability in high-mass star forming regions
(North-West University, 2018)The two brightest class II methanol masers - at 6.7- and 12.2-GHz, are exclusively associated with the early phases of high-mass star formation. This implies that studying these maser species is an indirect probe of the ... -
New periodic 6.7 GHz class II methanol maser associated with G358.460−0.391
(Oxford Univ Press, 2015)Eight new class II methanol masers selected from the 6.7 GHz Methanol Multibeam survey catalogues I and II were monitored at 6.7 GHz with the 26 m Hartebeesthoek Radio Astronomy Observatory radio telescope for three years ... -
Periodicity in Class II methanol masers in high-mass star-forming regions
(Oxford Univ Press, 2014)We report the results of 10 years of monitoring of six regularly varying 6.7 GHz methanol masers using the Hartebeesthoek 26-m telescope. Observations were done at intervals of 1–2 weeks, with faster sampling during ... -
Pumping of the 4.8 GHz H2CO masers and its implications for the periodic masers in G37.55+0.20
(EDP Sciences, 2014)Context. Periodic or regular flaring of class II CH3OH masers in nine high mass star forming regions is now a well established phenomenon. Amongst the nine star forming regions, G37.55+0.20 is the only case at present ...