# Research Main Page

Here is a summary of the projects I am working on.

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Each work tried to answer one or more specific questions, click the following links to see more detailed explanation.
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### Population of stellar rotation rates in star clusters

* [Whether stellar rotation rates is the reason for extended main-sequence turnoff found in intermediate-age clusters?](https://thisisweijia.gitbook.io/website/pssrr/stellar-rotation-and-the-extended-main-sequence-turnoff-in-the-open-cluster-ngc-5822)
* [Does split MS originates from stellar rotation dichotomy? If true, what causes the rotation distribution?](https://thisisweijia.gitbook.io/website/pssrr/tidal-locking-induced-stellar-rotation-dichotomy-in-the-open-cluster-ngc-2287)
* [Can stellar rotation explain every clusters? Is there any contribution from other mechanism?](https://thisisweijia.gitbook.io/website/pssrr/extended-main-sequence-turnoffs-in-the-double-cluster-h-and-x-persei)
* [Is the rotation rates in star clusters regulated by the same mechanism? Whether we can distinguish different formation scenario for the observed rotation distribution?](https://thisisweijia.gitbook.io/website/pssrr/binary-driven-stellar-rotation-evolution-at-the-main-sequence-turn-o-in-star-clusters)

### Blue straggler stars in Magellanic Clouds clusters

* [What's the origin of blue straggler stars in Magellanic Clouds clusters? Formed from primordial binaries or dynamical interaction?](https://thisisweijia.gitbook.io/website/bssmc/blue-straggler-stars-beyond-the-milky-way.-ii.-a-binary-origin-for-blue-straggler-stars-in-magellani)
* [Can we use the radial distribution of blue straggler stars as dynamical clocks in Magellanic Clouds clusters?](https://thisisweijia.gitbook.io/website/bssmc/blue-straggler-stars-beyond-the-milky-way.-iv.-radial-distributions-and-dynamical-implications)

### Properties of contact binaries

* [How to derive physical parameters for large population of contact binaries with only photometric observation? Is there any difference between various subtypes?](https://thisisweijia.gitbook.io/website/cbp/physical-parameters-of-late-type-contact-binaries-in-the-northern-catalina-sky-survey)

### Planetary nebulae in globular clusters

* [Is there any planetary nebulae in globular clusters in the Virgo cluster? If so, what can we learn from that?](https://thisisweijia.gitbook.io/website/pngc/a-search-for-planetary-nebulae-in-virgo-cluster-globular-clusters)

### Mass function of young massive clusters

* [Is the initial cluster mass function universal?](https://thisisweijia.gitbook.io/website/uicmf/the-star-cluster-mass-galactocentric-radius-relation-implications-for-cluster-formation)