A dataset provided by the European Space Agency

Name: X-ray emission as a probe of accretion in white dwarf - L dwarf binaries
Published: 2021-02-03T23:00:00Z

Proposal ID	084038
Title	X-ray emission as a probe of accretion in white dwarf - L dwarf binaries
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0840380201
DOI	https://doi.org/10.57780/esa-i5vpuof
Principal Investigator, PI	Prof Beate Stelzer
Abstract	L dwarfs in close binaries (period ~100min) with white dwarfs are rare althoughexpected to be the majority and representing the end stages of cataclysmicvariable evolution (period-bouncers). The detection of X-rays from WD / L dwarf(WDLD) binaries is an efficient diagnostic of accretion since L dwarf coronalemission is below the sensitivity of current instrumentation. XMM-Newton is theonly facility able to study these faint, moderately soft X-ray emitters. In AO14we detected X-ray orbital modulation in a known magnetic short-period WDLDsystem, thus setting a tight constraint on the mass transfer rate. We herepropose to continue our survey observing the only other 2 magnetic short-periodWDLDs aiming at understanding the evolutionary stage of such systems.
Publications	New X-ray detections of magnetic period-bounce cataclysmic variables from XMM-Newton and SRG/eROSITA \|Muu00f1oz-Giraldo Daniela Stelzer Beate et al. \| A&A \| 676-7 \| 2023 \| 2023A&A...676A...7M \| http://ui.adsabs.harvard.edu/#abs/2023A&A...676A...7M The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2020-01-14T04:07:21Z/2020-01-14T15:39:00Z
Version	18.02_20200221_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	2021-02-03T23:00:00Z
Last Update	2025-01-27
Keywords	"xray orbital modulation", "evolutionary stage", "dwarf binary", "white dwarfs", "mass transfer rate", "dwarf coronal emission", "dwarf wdld binary", "xmm newton", "close binary period", "XMM-Newton", "x ray emission", "facility able", "XMM", "efficient diagnostic", "white dwarf", "tight constraint"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Beate Stelzer, 2021, 'X-ray emission as a probe of accretion in white dwarf - L dwarf binaries', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-i5vpuof