janice

spacetelescope.bsky.social @spacetelescope.bsky.social [ View ] Mar 28, 2024 at 14:27 UTC

ULLYSES, the largest Hubble program ever, collected information about almost 500 young stars over a three-year period. It aims to help researchers gain new insights about the stars’ formation, evolution, and impact on their surroundings: bit.ly/497YZMY 🔭 🧪

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janice @janiceleeastro.bsky.social [ View ] Mar 17, 2024 at 18:30 UTC

✨🔭🧪🧵 check out the paper for much more discussion, including on what this multi-scale diagram teaches us about star formation and galaxy evolution. ...this cluster census is the product of years of technical work by a fabulous group of ppl that I'm incredibly lucky to be able to work with✨

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janice @janiceleeastro.bsky.social [ View ] Mar 17, 2024 at 18:13 UTC

✨🔭🧪🧵 This plot: the galaxy main-sequence (star formation rate of a galaxy vs. its stellar mass) Each blob = UBVI color-color distribution of 100-1000's of clusters in a single galaxy

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janice @janiceleeastro.bsky.social [ View ] Mar 17, 2024 at 18:09 UTC

✨🔭🧵🧪
the cluster catalog is useful testing stellar population models, and for studies astrophysics. As (effectively) single-age populations, they have great utility as “clocks” for timing various phases of the star formation cycle. The catalog is available at archive.stsci.edu/hlsp/phangs

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janice @janiceleeastro.bsky.social [ View ] Mar 17, 2024 at 18:01 UTC

🧵🧪✨🔭 the present-day cluster population has three distinct features in the UBVI diagram: a young cluster locus (blue), a middle-age plume (green), and a globular cluster clump (red).

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janice @janiceleeastro.bsky.social [ View ] Mar 17, 2024 at 18:00 UTC

🧵✨🔭🧪 this is what the UBVI color-color diagram looks like with ~15,000 clusters from many nearby galaxies. Blue, young populations are at the top left. The BC03 track of a solar metallicity single-age population (SSP) is overlaid. As clusters age, they become redder and end up in the bottom right.

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janice @janiceleeastro.bsky.social [ View ] Mar 17, 2024 at 17:50 UTC

Belated paper day... and first try at writing a 🧵 here!
✨🧪🔭
paper describing the largest census to-date of ~100,000 stellar clusters and associations from the PHANGS-HST imaging survey of 38 spiral galaxies
ui.adsabs.harvard.edu/abs/2024arXi...

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