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 virgul100min) 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 \|Mu\\u00f1oz-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
Keywords	"dwarf coronal emission", "tight constraint", "mass transfer rate", "facility able", "close binary period", "XMM", "x ray emission", "dwarf wdld binary", "dwarf binary", "white dwarfs", "white dwarf", "evolutionary stage", "XMM-Newton", "xray orbital modulation", "efficient diagnostic", "xmm newton"
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