An environmental analysis of supernova iPTF13bvn with HST and MUSE
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| Format: | Preprint |
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2025
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| author | Singleton, Adam J. Maund, Justyn R. Sun, Ning-Chen |
| author_facet | Singleton, Adam J. Maund, Justyn R. Sun, Ning-Chen |
| contents | Searches for supernovae (SNe) progenitors have relied on a direct detection of the star in fortuitous pre-explosion images. We propose an alternative method, using a combination of photometric stellar population fitting alongside integral-field-unit (IFU) spectroscopic analysis of the ionised gas to fully explore the SN environment and constrain the progenitor properties. Isochrone fitting of HST/WFC3 observations reveals the environment of iPTF13bvn contains two stellar populations with unique age ($τ=\log{t [years]}$) and extinction ($A_V$) values, with the closest agreement found between past progenitor studies of iPTF13bvn and our oldest stellar population (P2): $τ_{P2}=6.97^{+0.06}_{-0.06}$, a corresponding initial mass $M_{initial,P2} = 20.0 M_\odot$ and $A_{V,P2}=0.53^{+0.10}_{-0.08}$ mag. Further analysis with VLT/MUSE IFU-spectroscopic observations reveals no bright H II regions associated with iPTF13bvn, suggesting no immediate ongoing star formation. Extinctions derived from the ionised gas are a minimum of ~2.5 times higher than the resolved stellar population values, assisting in building a 3D picture of the environment. An analysis of the distribution of spaxel extinctions reveals increased variability in the environment of iPTF13bvn, on the edge of a spiral arm. Our study highlights the complex relationship between stars, gas and dust and how, when used in a holistic environmental analysis, they can begin to resolve degeneracies that have plagued past progenitor investigations. Specifically for iPTF13bvn, our results support a binary progenitor and a growing consensus for binarity as the predominant mass-loss mechanism for Type Ib SNe progenitors. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_08099 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An environmental analysis of supernova iPTF13bvn with HST and MUSE Singleton, Adam J. Maund, Justyn R. Sun, Ning-Chen High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics Searches for supernovae (SNe) progenitors have relied on a direct detection of the star in fortuitous pre-explosion images. We propose an alternative method, using a combination of photometric stellar population fitting alongside integral-field-unit (IFU) spectroscopic analysis of the ionised gas to fully explore the SN environment and constrain the progenitor properties. Isochrone fitting of HST/WFC3 observations reveals the environment of iPTF13bvn contains two stellar populations with unique age ($τ=\log{t [years]}$) and extinction ($A_V$) values, with the closest agreement found between past progenitor studies of iPTF13bvn and our oldest stellar population (P2): $τ_{P2}=6.97^{+0.06}_{-0.06}$, a corresponding initial mass $M_{initial,P2} = 20.0 M_\odot$ and $A_{V,P2}=0.53^{+0.10}_{-0.08}$ mag. Further analysis with VLT/MUSE IFU-spectroscopic observations reveals no bright H II regions associated with iPTF13bvn, suggesting no immediate ongoing star formation. Extinctions derived from the ionised gas are a minimum of ~2.5 times higher than the resolved stellar population values, assisting in building a 3D picture of the environment. An analysis of the distribution of spaxel extinctions reveals increased variability in the environment of iPTF13bvn, on the edge of a spiral arm. Our study highlights the complex relationship between stars, gas and dust and how, when used in a holistic environmental analysis, they can begin to resolve degeneracies that have plagued past progenitor investigations. Specifically for iPTF13bvn, our results support a binary progenitor and a growing consensus for binarity as the predominant mass-loss mechanism for Type Ib SNe progenitors. |
| title | An environmental analysis of supernova iPTF13bvn with HST and MUSE |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2506.08099 |