Hα emission and H ii regions at the locations of recent supernovae in nearby galaxies

Media type: E-Article

Title: Hα emission and H ii regions at the locations of recent supernovae in nearby galaxies

Contributor: Mayker Chen, Ness [Author]; Leroy, Adam K. [Author]; Sarbadhicary, Sumit K. [Author]; Lopez, Laura A. [Author]; Thompson, Todd A. [Author]; Barnes, Ashley T. [Author]; Emsellem, Eric [Author]; Groves, Brent [Author]; Chandar, Rupali [Author]; Chevance, Mélanie [Author]; Chown, Ryan [Author]; Dale, Daniel A. [Author]; Egorov, Oleg [Author]; Glover, Simon [Author]; Grasha, Kathryn [Author]; Klessen, Ralf S. [Author]; Kreckel, Kathryn [Author]; Li, Jing [Author]; Méndez-Delgado, José Eduardo [Author]; Murphy, Eric J. [Author]; Pathak, Debosmita [Author]; Schinnerer, Eva [Author]; Thilker, David A. [Author]; Úbeda, Leonardo [Author]; Williams, Thomas G. [Author]

Published: July

Language: English

DOI: 10.3847/1538-3881/ad3fb7

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Footnote: Veröffentlicht: 18. Juni 2024

Description: We present a statistical analysis of the local, ≈50-100 pc scale, Hα emission at the locations of recent (≤125 yr) supernovae (SNe) in nearby star-forming galaxies. Our sample consists of 32 SNe in 10 galaxies that are targets of the PHANGS-MUSE survey. We find that 41% (13/32) of these SNe occur coincident with a previously identified H ii region. For comparison, H ii regions cover 32% of the area within ±1 kpc of any recent SN. Contrasting this local covering fraction with the fraction of SNe coincident with H ii regions, we find a statistical excess of 7.6% ± 8.7% of all SNe to be associated with H ii regions. This increases to an excess of 19.2% ± 10.4% when considering only core-collapse SNe (CCSNe). These estimates appear to be in good agreement with qualitative results from new, higher-resolution Hubble Space Telescope Hα imaging, which also suggests many CCSNe detonate near but not in H ii regions. Our results appear consistent with the expectation that only a modest fraction of stars explode during the first ≲5 Myr of the life of a stellar population when Hα emission is expected to be bright. Of the H ii region associated SNe, 85% (11/13) also have associated detected CO (2-1) emission, indicating the presence of molecular gas. The SNe associated with H ii regions have typical extinctions of A V ∼ 1 mag, consistent with a significant amount of pre-clearing of gas from the region before the SNe explode.

Access State: Open Access

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