| Name | 084513 |
| Title | Hypervelocity White Dwarfs: Telltale Signatures of a Double-Degenerate Type Ia? |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0845130201 |
| DOI | https://doi.org/10.5270/esa-pjcny8l |
| Author | Prof Jimmy Irwin |
| Description | The progenitors of Type Ia supernovae have remained a mystery for decades. While it seems certain that the explosion of a C-O white dwarf is involved, the secondary may be a non-degenerate star or another white dwarf. In the latter case, the companion white dwarf has an orbital velocity of 1100-2400 km-s before the explosion, and retains this velocity following the explosion. A recent search for hypervelocity white dwarfs with Gaia has yielded several intriguing candidates for runaway survivors from double-degenerate Type Ia explosions. We propose short XMM-Newton exposures of these white dwarfs to place the first X-ray constraints on potential coronal X-ray emission from these stars. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-05-11T20:43:03Z/2019-05-16T00:22:30Z |
| Version | 17.56_20190403_1200 |
| 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 | 2020-07-08T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2020-07-08T22:00:00Z, 084513, 17.56_20190403_1200. https://doi.org/10.5270/esa-pjcny8l |