As the oldest known stars, globular clusters give us a window into Galactic formation history. The multiple population phenomena in globular clusters gives us a glimpse at gobular cluster evolution, but due to current technical constraints it is not possible to observe the phenomena beyond the Milky Way. To overcome this limitation we investigate the horizontal branch parameter L2, a proxy of the multiple population phenomenon and internal helium variation. Observing Magellanic globular clusters, we determine if host environment affects previously observed properties of multiple populations via the L2 parameter. In addition we investigate the L1 parameter of young Magellanic globular clusters to determine if the age-L1 relation is confirmed at young ages. We find that the age-L1 relation is consistent at ages >11 Gyr, but is not apparent for young clusters. The L2 parameter retains it's relations with mass and magnitude previously exhibited in Galactic globular clusters in the F606W and F814W filters.
As the oldest known stars, globular clusters give us a window into Galactic formation history. The multiple population phenomena in globular clusters gives us a glimpse at gobular cluster evolution, but due to current technical constraints it is not possible to observe the phenomena beyond the Milky Way. To overcome this limitation we investigate the horizontal branch parameter L2, a proxy of the multiple population phenomenon and internal helium variation. Observing Magellanic globular clusters, we determine if host environment affects previously observed properties of multiple populations via the L2 parameter. In addition we investigate the L1 parameter of young Magellanic globular clusters to determine if the age-L1 relation is confirmed at young ages. We find that the age-L1 relation is consistent at ages >11 Gyr, but is not apparent for young clusters. The L2 parameter retains it's relations with mass and magnitude previously exhibited in Galactic globular clusters in the F606W and F814W filters.
Exploring the second parameter problem in the Magellanic Clouds.
MERRILL, LLEWYN DALE
2024/2025
Abstract
As the oldest known stars, globular clusters give us a window into Galactic formation history. The multiple population phenomena in globular clusters gives us a glimpse at gobular cluster evolution, but due to current technical constraints it is not possible to observe the phenomena beyond the Milky Way. To overcome this limitation we investigate the horizontal branch parameter L2, a proxy of the multiple population phenomenon and internal helium variation. Observing Magellanic globular clusters, we determine if host environment affects previously observed properties of multiple populations via the L2 parameter. In addition we investigate the L1 parameter of young Magellanic globular clusters to determine if the age-L1 relation is confirmed at young ages. We find that the age-L1 relation is consistent at ages >11 Gyr, but is not apparent for young clusters. The L2 parameter retains it's relations with mass and magnitude previously exhibited in Galactic globular clusters in the F606W and F814W filters.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/92353