TDE host galaxy
In 2021, I spent most of time studying the host galaxy of tidal disruption event (TDE) with Prof. Sjoert van Velzen.
We were interested in the correlation between pc-scale physics around the disruption and the kpc-scale galactic environment.
We used the stellar population synthesis (SPS) method and extinction corrected UV+optical+IR photometry data to infer the stellar mass, star formation history, metallicity and dust extinction of the galaxies.
We then used several different statistics methods to analyze possible relations between TDE spectral type and these galactic properties.
The methods include using Anderson-Darling tests on individual parameters, and on a composite parameter proposed in van Velzen+2021, and using the Wasserstein test on all the parameters simultaneously.
After a careful consideration of the uncertainties of the SPS parameters and the multiple comparisons problem, we claimed that there was no sign of apparent correlations between pc-scale TDE spectral types and kpc-scale galactic properties given current data.
But I plan to dig deeper into the multi-dimensional statistic tests and multi-comparison problems when I finish my Ph.D application.
I continue to work with Professor van Velzen on the compactness estimation of the TDE host galaxies. We try to utilize the Gaia and SDSS data to measure the compactness of the galaxies.
Our findings so far enrich our current understanding of TDE preference on a scale that hasn't been explored before. The latter compactness project is still in progress and we plan to push on it after my PhD application.