| Name | 090237 |
| Title | White Dwarf Masses and Spin Periods for Hard X-ray-Selected Galactic Sources |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0902370101 |
| DOI | https://doi.org/10.57780/esa-w7vn3ll |
| Author | European Space Agency |
| Description | Accreting white dwarfs (WDs) can be strong emitters of X-rays. In intermediate polar (IP) type cataclysmic variables, the accreting material is funneled onto the WD.s magnetic poles. The X-rays are produced by shock-heating, and the temperature depends on the WD mass. Thus, X-ray spectra provide a WD mass measurement. An important question is whether the WD mass distribution extends up to the Chandrasekhar limit. The best place to look for high-mass WDs is among IPs with the highest temperatures, making IPs found by INTEGRAL strong candidates for hosting the most massive WDs. Here, we propose XMM-Newton and NuSTAR observations of two IGR sources that are likely IPs. The goals include detecting the WD spin period to confirm the IP natures of the sources and to measure the WD masses. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-05-29T21:46:45Z/2022-07-03T05:55:09Z |
| Version | 20.08_20220509_1852 |
| 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 | 2023-07-19T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2023, White Dwarf Masses And Spin Periods For Hard X-Ray-Selected Galactic Sources, 20.08_20220509_1852, European Space Agency, https://doi.org/10.57780/esa-w7vn3ll |