Dice Question Streamline Icon: https://streamlinehq.com

Ascertain whether the eROSITA X-ray emission in G321.3–3.9 is ejecta-dominated or dominated by shocked circumstellar/interstellar material

Determine whether the diffuse X-ray emission observed by SRG/eROSITA in the supernova remnant G321.3–3.9 is dominated by supernova ejecta or by shocked circumstellar and/or interstellar material, by conducting deeper spectral analysis capable of distinguishing the origin of the thermal components and elemental abundances.

Information Square Streamline Icon: https://streamlinehq.com

Background

The authors modeled the eROSITA eRASS:4 X-ray spectrum of G321.3–3.9 using TBabs*vpshock, TBabs*vapec, and TBabs*vnei, finding comparable goodness-of-fit across models due to limited photon statistics. They report a noticeable scarcity of Ne and Mg but note the large uncertainties on abundances.

They remark that if emission is dominated by ejecta, the abundance pattern may suggest a thermonuclear (Type Ia) origin, but the current data do not distinguish whether the emission primarily originates from ejecta or from circumstellar/interstellar material, motivating further analysis.

References

However, determining whether the X-ray emission is dominated by the ejecta or by circumstellar and/or interstellar material requires further analysis.

— G321.3-3.9: A new supernova remnant observed with multi-band radio data and in the SRG/eROSITA All-Sky Surveys (2401.17294 - Mantovanini et al., 30 Jan 2024) in Section 3: eROSITA observations of G321.3–3.9