| Proposal ID | 050264 |
| Title | Testing Boundary Layer Theory with XMM-Newton Observations of Dwarf Novae |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0502640201 |
| DOI | https://doi.org/10.5270/esa-6go95ln |
| Principal Investigator, PI | Prof Patrick Godon |
| Abstract | We propose to obtain XMM-Newton observations of two dwarf novae above the periodgap, to probe and characterize the structure and nature of their boundarylayers. In particular RU Peg contains the hottest WD in a DN, and SS Aur has anear Chandrasekhar mass WD, and both are at very low inclination and haveexcellent parallax distances. The Spectra will allow us to characterize the typeof X-ray spectra exhibited by the systems, temperatures and densitites in theBLs and to map out the velocity structure of the BL by using the line widths ofX-ray lines formed at different temperatures to examine wind outflow versus highrotational velocity of the BL and the extent to which X-ray BL is deceleratedfrom the Keplerian motion of the inner disk (5,000km/s for these 2 massive WDs). |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-04-07T08:17:45Z/2008-04-07T23:30:41Z |
| Version | 17.56_20190403_1200 |
| 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 | 2009-06-05T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "period gap", "examine wind outflow", "xmm newton", "hottest wd", "parallax distances", "rotational velocity", "velocity structure", "low inclination", "keplerian motion", "inner disk", "xray lines formed", "chandrasekhar mass wd", "boundary layers", "dwarf novae", "xray bl", "xray spectra", "ss aur", "XMM-Newton", "massive wds", "ru peg", "line widths", "XMM" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Patrick Godon, 2009, 'Testing Boundary Layer Theory with XMM-Newton Observations of Dwarf Novae', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-6go95ln |