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
License: https://creativecommons.org/licenses/by-nc/3.0/igo

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 Search for Young Stellar Objects within 4XMM-DR13 Using CatBoost and SPE \|Ma Xiangyao Zhang Yanxia et al. \| AJ \| 168-210 \| 2024 \| 2024AJ....168..210M \| http://ui.adsabs.harvard.edu/#abs/2024AJ....168..210M
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2020-01-14T04:07:21Z/2020-01-14T15:39:00Z
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	2021-02-03T23:00:00Z
Last Update	2026-07-09
Keywords	"white dwarfs", "white dwarf", "XMM-Newton", "tight constraint", "efficient diagnostic", "facility able", "evolutionary stage", "xray orbital modulation", "mass transfer rate", "XMM", "x ray emission", "dwarf coronal emission", "dwarf wdld binary", "close binary period", "dwarf binary", "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', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-i5vpuof
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.