Hadronic particle acceleration in the supernova remnant SN 1006 as traced by Fermi-LAT observations
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2024
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| author | Lemoine-Goumard, M. Acero, F. Ballet, J. Miceli, M. |
| author_facet | Lemoine-Goumard, M. Acero, F. Ballet, J. Miceli, M. |
| contents | The supernova remnant SN 1006 is a source of high-energy particles detected at radio, X-rays, and tera-electronvolt gamma rays. It was also announced as a source of gamma rays by Fermi-LAT but only the north-east (NE) limb was detected at more than $5σ$ significance level. Using 15 years of Fermi-LAT observation and a thorough morphological analysis above 1 GeV, we report the detection of the NE rim at the $6σ$ level and the south-west (SW) rim at the $5.5σ$ level using radio templates from the GLEAM survey. The spectral analysis performed between 100 MeV and 1 TeV allows the detection of a hard spectral index for the NE limb of $1.7 \pm 0.1 \pm 0.1$ while the emission detected in the SW is well reproduced with a steeper spectral index of $2.2 \pm 0.1 \pm 0.1$. A marginal detection (~$3σ$) of emission coincident with the bright north-west (NW) H$α$ filament is also described with a similar spectral index of ~2.1. We successfully characterized the non-thermal multi-wavelength emission of the NE and SW limbs with a model in which inverse-Compton emission dominates in the NE while proton-proton interactions becomes significant in the SW due to the enhanced density of the medium. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_08190 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hadronic particle acceleration in the supernova remnant SN 1006 as traced by Fermi-LAT observations Lemoine-Goumard, M. Acero, F. Ballet, J. Miceli, M. High Energy Astrophysical Phenomena The supernova remnant SN 1006 is a source of high-energy particles detected at radio, X-rays, and tera-electronvolt gamma rays. It was also announced as a source of gamma rays by Fermi-LAT but only the north-east (NE) limb was detected at more than $5σ$ significance level. Using 15 years of Fermi-LAT observation and a thorough morphological analysis above 1 GeV, we report the detection of the NE rim at the $6σ$ level and the south-west (SW) rim at the $5.5σ$ level using radio templates from the GLEAM survey. The spectral analysis performed between 100 MeV and 1 TeV allows the detection of a hard spectral index for the NE limb of $1.7 \pm 0.1 \pm 0.1$ while the emission detected in the SW is well reproduced with a steeper spectral index of $2.2 \pm 0.1 \pm 0.1$. A marginal detection (~$3σ$) of emission coincident with the bright north-west (NW) H$α$ filament is also described with a similar spectral index of ~2.1. We successfully characterized the non-thermal multi-wavelength emission of the NE and SW limbs with a model in which inverse-Compton emission dominates in the NE while proton-proton interactions becomes significant in the SW due to the enhanced density of the medium. |
| title | Hadronic particle acceleration in the supernova remnant SN 1006 as traced by Fermi-LAT observations |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2412.08190 |