X-ray Observations of Two Type Ia Supernovae with an H$α$ Line in their Optical Spectrum
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arXiv
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| Format: | Preprint |
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2024
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| author | Dwarkadas, Vikram V. |
| author_facet | Dwarkadas, Vikram V. |
| contents | We report on Chandra X-ray observations of SN 2016jae and SN 2018cqj, both low luminosity Type Ia supernova that showed the presence of a H line in their early optical spectrum. No X-ray emission is detected at the location of either SN. Upper limits to the luminosity of up to 2 $\times 10^{40}\,$ erg s$^{-1}$ are calculated for each SN, depending on the assumed spectral model, temperature and column density. This luminosity is comparable to that of another low-luminosity Type Ia SN, SN 2018fhw, that was observed with Chandra. It is generally lower than upper limits calculated for Type Ia-CSM SNe observed in X-rays, and also below that of SN 2012ca, the only Type Ia-CSM SN to have been detected in X-rays. Comparisons are made to other Type Ia SN with a H line observed in X-rays. The observations suggest that while the density into which the SN is expanding may have been high at the time the H$α$ line was detected, it had decreased considerably by the time of X-ray observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_00279 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | X-ray Observations of Two Type Ia Supernovae with an H$α$ Line in their Optical Spectrum Dwarkadas, Vikram V. High Energy Astrophysical Phenomena We report on Chandra X-ray observations of SN 2016jae and SN 2018cqj, both low luminosity Type Ia supernova that showed the presence of a H line in their early optical spectrum. No X-ray emission is detected at the location of either SN. Upper limits to the luminosity of up to 2 $\times 10^{40}\,$ erg s$^{-1}$ are calculated for each SN, depending on the assumed spectral model, temperature and column density. This luminosity is comparable to that of another low-luminosity Type Ia SN, SN 2018fhw, that was observed with Chandra. It is generally lower than upper limits calculated for Type Ia-CSM SNe observed in X-rays, and also below that of SN 2012ca, the only Type Ia-CSM SN to have been detected in X-rays. Comparisons are made to other Type Ia SN with a H line observed in X-rays. The observations suggest that while the density into which the SN is expanding may have been high at the time the H$α$ line was detected, it had decreased considerably by the time of X-ray observations. |
| title | X-ray Observations of Two Type Ia Supernovae with an H$α$ Line in their Optical Spectrum |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2407.00279 |