Speaker
Description
30 Doradus is one of the most active star-forming regions. In its main body, confirming supernova remnants (SNRs) remains challenging due to the highly ionized environment, strong thermal emission, and diluted optical shock diagnostics.
In this work, we present compelling multiwavelength evidence for an SNR located in Shell 1 within the main body of 30 Dor A, based on archival observations from HST, CTIO, Spitzer, Chandra, MeerKAT, and ASKAP.
We identify several key SNR signatures, including diffuse X-ray emission, nonthermal radio emission with a spectral index of $\alpha \approx -0.64$, localized enhancements of the [SII]/H$\alpha$ ratio, and high-velocity features in the H$\alpha$ line revealed by high-dispersion echelle spectroscopy. Taken together, these diagnostics strongly support the presence of an SNR embedded in a highly photoionized environment, where traditional criteria alone may fail.
By examining the underlying massive stellar population, we further constrain the properties of the supernova progenitor and identify a bright X-ray point source, CX15, consistent with a neutron star or pulsar candidate.
Our results demonstrate that multiwavelength analysis is essential for identifying SNRs in extreme environments such as 30 Dor, and provide new insights into supernova activity in giant HII regions.
| Participate the oral/poster presentation award competition | Yes |
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