| Name | 086316 |
| Title | Nitrogen Abundance and the Hot Blackbody Puzzle of Intermediate Polars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0863160101 |
| DOI | https://doi.org/10.57780/esa-tdrgf9n |
| Author | European Space Agency |
| Description | V2731 Oph is an intermediate polar with a complex X-ray spectrum including a hot (kTvirgul100 eV) blackbody component, according to a previous short XMM-Newton observation, indicative of a locally super-Eddington accretion rate. However, it is possible that the temperature measurement was incorrect because V2731 Oph is overabundant in nitrogen, which went unnoticed in the previous analysis due to the lack of high S/N RGS spectrum. If overabundance is confirmed, it can both solve the hot blackbody puzzle and have important implications on the past evolutionary history of V2731 Oph. We therefore propose a much longer XMM-Newton observation to obtain high quality RGS data. We also request a simultaneous NuSTAR observation to break potential degeneracies among soft and hard component parameters. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-09-05T12:17:22Z/2020-09-06T06:25:12Z |
| Version | 18.02_20200221_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 | 2021-10-03T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2021, Nitrogen Abundance And The Hot Blackbody Puzzle Of Intermediate Polars, 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-tdrgf9n |