The R Coronae Borealis shell is 8 parsecs or 26 light-years across, about 20 times as large as any shell previously found around a late-type star
such as this.
Most globular clusters show a certain degree of uniformity in the evolutionary paths followed by their late-type stars
. However, the cluster Omega Cen is anomalous and Tom showed the scatter in its colour-magnitude diagram and the presence of strong s-process lines resulted from increasing quantities of processed material from different stellar generations (see e.g.
The spectrum reveals both absorption lines from late-type stars
(most notably titanium oxide, TiO) and bright HI and HeI emission lines from the hot compact companion.
Among the topics are gravitational wave foreground radiation from neutron star-dwarf binaries, the chromospheric activity of late-type stars
of the different rotational periods, spectrophotometry and model atmosphere flux fitting, the light-time effect and tertiary companions in close binary stars, the age of the local interstellar bubble, and the current status and outreach activities of radio astronomy in Malaysia.
Red stars represent the late-type stars
in the spectral classification system developed nearly 80 years ago at Harvard College Observatory.