| Name | 088462 |
| Title | Providing the first evidence of a sub-MCh progenitor for the Type Ia SNR DEM L71 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0884620101 |
| DOI | https://doi.org/10.57780/esa-aj2t90o |
| Author | European Space Agency |
| Description | We propose a deep observation of DEM L71, a middle-aged Type Ia SNR in the LMC, primarily using the Reflection Grating Spectrometers (RGS). Previous XMM-Newton and Chandra studies of this SNR revealed the centrally-peaked emission from the Fe-rich ejecta, indicating that the whole supernova ejecta have been heated by the reverse shock. Our analysis of the existing RGS data indicates an unusually low Ni/Fe mass ratio, although its uncertainties are somewhat large. Theoretically, such low Ni/Fe ratio is expected only for a thermonuclear explosion of a sub-Chandrasekhar-mass white dwarf (sub-MCh WD). With this proposed observation, we will put a stringent constraint on the Ni/Fe ratio, providing the first robust evidence of the sub-MCh progenitor for a single Type Ia SN/SNR. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-04-12T22:04:08Z/2022-04-14T11:14:18Z |
| Version | 19.17_20220121_1250 |
| Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2023-05-07T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2023, Providing The First Evidence Of A Sub-Mch Progenitor For The Type Ia Snr Dem L71, 19.17_20220121_1250, European Space Agency, https://doi.org/10.57780/esa-aj2t90o |