: New Insights into the Mysterious Yellow Hypergiant Stars Outbursts
Tue 18 Feb 2025; A recent five-year study has uncovered new insights into the properties of Yellow Hypergiants, a heavy star class known for their dramatic outbursts. Scientists focused on Rho Cassiopeiae (Rho Cas), HR 8752, and HR 5171A, revealing that Rho Cas exhibits cyclical outbursts every 10 to 40 years, with large fluctuations of its surface temperature. Arnout van Genderen was initiator of this international study that combined historical data covering 138 years. The results, published in Astronomy and Astrophysics, show that vigorous pulsations trigger these massive eruptions. They also offer a clearer understanding of the Yellow Hypergiants? fast evolution and their potential transformation into Luminous Blue Variable stars or explosive supernovae.
Read morePubl. Tue 18 Feb 2025