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| Natura: | Preprint |
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2025
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| Accesso online: | https://arxiv.org/abs/2507.11647 |
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| _version_ | 1866912484579868672 |
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| author | Hanover, Tyler E. Leising, Mark D. |
| author_facet | Hanover, Tyler E. Leising, Mark D. |
| contents | We present the results of a search for scandium K$_α$ X-ray fluorescence resulting from $^{44}$Ti electron capture decay in four young supernova remnants. We analyzed archival XMM-Newton data from Tycho's SNR, Kepler's SNR, Cassiopeia A, and SN 1987A. We fit the X-ray spectra in regions of interest with up to four components, thermal and power-law, as needed to fit the spectrum, and add a gaussian to test for extra Sc emission. While all require the line with modest confidence, none represent definitive detections on their own, and all are consistent with previous gamma-ray detections or limits on the $^{44}$Ti mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_11647 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | X-ray Measurements of $^{44}$Ti in Four Supernova Remnants Hanover, Tyler E. Leising, Mark D. High Energy Astrophysical Phenomena We present the results of a search for scandium K$_α$ X-ray fluorescence resulting from $^{44}$Ti electron capture decay in four young supernova remnants. We analyzed archival XMM-Newton data from Tycho's SNR, Kepler's SNR, Cassiopeia A, and SN 1987A. We fit the X-ray spectra in regions of interest with up to four components, thermal and power-law, as needed to fit the spectrum, and add a gaussian to test for extra Sc emission. While all require the line with modest confidence, none represent definitive detections on their own, and all are consistent with previous gamma-ray detections or limits on the $^{44}$Ti mass. |
| title | X-ray Measurements of $^{44}$Ti in Four Supernova Remnants |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2507.11647 |