A dataset provided by the European Space Agency

Name: X-ray emission as a probe of accretion in white dwarf - L dwarf binaries
Published: 2016-06-23T22:00:00Z

Proposal ID	076044
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=0760440101
DOI	https://doi.org/10.5270/esa-bjxo067
Principal Investigator, PI	Dr Beate Stelzer
Abstract	Only a handful of short-period (~ 100 min) binary systems composed of whitedwarf (WD) and L dwarf (WDLDs) are known. The detection of X-ray emission fromsuch systems can be considered a clear sign for accretion because the coronalX-ray emission levels of L dwarfs are below the sensitivity limits of currentinstrumentation. Only one WDLD (SDSS J121209.31+013627.7) was detected withSwift as a relatively bright X-ray source (log(L_x) erg/s ~ 29.3). We proposeto search for orbital modulation of the X-ray emission in SDSS J1212+0136 andanother promising WDLD accretor candidate to confirm the presence of anaccretion spot on the WD. These observations will yield the strongestconstraints ever obtained for mass transfer rates in binaries with low-mass stars (~ 5 10^(-15) Msun/yr).
Publications	X-ray orbital modulation of a white dwarf accreting from an L dwarf. The system SDSS J121209.31+013627.7 \|Stelzer B. de Martino D. et al. \| A&A \| 598-6 \| 2017 \| 2017A&A...598L...6S \| http://ui.adsabs.harvard.edu/#abs/2017A&A...598L...6S The composite X-ray spectra of radio-loud and radio-quiet SDSS quasars \|Zhou Min-Hua Gu Min-Feng \| RAA \| 21-4 \| 2021 \| 2021RAA....21....4Z \| http://ui.adsabs.harvard.edu/#abs/2021RAA....21....4Z Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z 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 Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2015-06-06T21:01:59Z/2015-06-07T04:04:43Z
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	2016-06-23T22:00:00Z
Last Update	2025-01-27
Keywords	"white dwarf", "short period", "sensitivity limits", "accretion spot", "white dwarf wd", "dwarf binary", "SDSS", "wdld sdss j121209", "mass transfer rates", "strongest constraints", "x ray emission", "orbital modulation", "xray emission", "dwarf wdlds", "sdss j1212", "low mass stars", "binary systems composed"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Beate Stelzer, 2016, 'X-ray emission as a probe of accretion in white dwarf - L dwarf binaries', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-bjxo067