| Proposal ID | 015253 |
| Title | Spin periods and accretion disc structure in CVs below the period gap |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0152530101 |
| DOI | https://doi.org/10.5270/esa-d38oh8y |
| Principal Investigator, PI | Dr Pasi Hakala |
| Abstract | Our XMM-Newton observations of dwarf nova OY Car have revealed a possible WDspin period at 0.41 of the orbital period (Ramsay et al. 2001a). Now we plan to observe a set of other dwarf novae below the period gap in order to searchfor WD spin periods. If they are detectable in X-rays, it immediatedly impliesthat the white dwarfs in these systems are at least weakly magnetic. This wouldextend the spectrum of magnetic CVs into even weaker field systems than theintermediate polars. We will also use our accretion disc structure modellingcodes, together with combined X-ray and OM light curves, to retrieve informationon the 3D structure of the discs in these systems. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2002-10-05T07:02:40Z/2002-10-05T17:17:46Z |
| Version | 21.51_20241115_1113 |
| 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 | 2003-11-14T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "combined xray", "white dwarfs", "intermediate polars", "XMM-Newton", "accretion disc structure", "orbital period ramsay", "3d structure", "XMM", "immediatedly implies", "dwarf novae", "wd spin period", "weaker field systems", "spin periods", "magnetic cv", "weakly magnetic", "period gap", "retrieve information", "wd spin periods", "om light curves", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Pasi Hakala, 2003, 'Spin periods and accretion disc structure in CV's below the period gap', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-d38oh8y |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |