| Proposal ID | 088462 |
| Title | Providing the first evidence of a sub-MCh progenitor for the Type Ia SNR DEM L71 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0884620101 |
| DOI | https://doi.org/10.57780/esa-aj2t90o |
| Principal Investigator, PI | Prof Hiroya Yamaguchi |
| Abstract | 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-Newtonand Chandra studies of this SNR revealed the centrally-peaked emission from theFe-rich ejecta, indicating that the whole supernova ejecta have been heated bythe reverse shock. Our analysis of the existing RGS data indicates an unusuallylow Ni/Fe mass ratio, although its uncertainties are somewhat large.Theoretically, such low Ni/Fe ratio is expected only for a thermonuclearexplosion of a sub-Chandrasekhar-mass white dwarf (sub-MCh WD). With thisproposed 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. |
| Publications | No publications found for 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 Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "reverse shock", "fe ratio", "XMM-Newton", "thermonuclear explosion", "fe mass ratio", "centrally peaked emission", "dem l71", "sub mch progenitor", "existing rgs data", "xmm newton", "fe rich ejecta", "robust evidence", "stringent constraint", "low ni", "supernova ejecta", "supernova remnant" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Hiroya Yamaguchi, 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 |