Shuyu Tan

Shuyu Tan

I received an MPhil in Physics from HKU (2022) and a BSc in Physics from Imperial (2019). Currently, I am an Research Assitant at LSR, HKU.

Publications

2024MNRAS.527.6363T

Published in Monthly Notices of the Royal Astronomical Society, 2023

Abstract: In this paper, the third of a series of papers, we present well-determined chemical abundances for 124 planetary nebulae (PNe) in the Galactic bulge from deep, long-slit FORS2 spectra from the 8.2 m ESO Very Large telescope (VLT). Prior to this work there were only ∼240 bulge PNe with chemical abundances previously determined over a ∼50 yr period and of highly variable quality. For 34 of these PNe we are presenting their abundances for the first time, which adds ∼14 per cent to the available sample of bulge PNe abundances.

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2023ApJ…951L..44T

Published in The Astrophysical Journal Letters, 2023

Abstract: We report observations of a remarkable major axes alignment nearly parallel to the Galactic plane of 5σ significance for a subset of bulge “planetary nebulae” (PNe) that host, or are inferred to host, short-period binaries.

Figure - The left panel presents a visualization of the Galactic Position Angles (GPAs) of PNe using vectors. PNe with short-period binary central stars are highlighted in red, while those highly likely to possess such binary systems are indicated in blue. The right panel displays a corner plot for the mean GPA and its standard deviation for our short-period binary sample. For more detailed information, please refer to the paper.

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2023MNRAS.519.1049T

Published in Monthly Notices of the Royal Astronomical Society, 2022

Abstract: This is the first in a series of papers that present sets of different results for 136 compact, known planetary nebulae within a 10 × 10 degree region of the Galactic bulge. We use a large, previously unpublished sample of our own extensive ESO 8 m VLT deep imaging and spectroscopic data. This is combined with archival deep HST imaging where available to provide a detailed morphological classification and study. The influence of angular resolution and sensitivity when assigning a morphology is discussed.

Figure - The left panel present a schematic description of PN morphology classification I made based on the criteria introduced in Parker et al. (2006). The right panel compares the fraction of PNe in different morphologies in our sample to those in the HASH PNe database.

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