A dataset provided by the European Space Agency

Name: Using XMM-Newton to study a massive white dwarf merger
Published: 2020-08-21T22:00:00Z

Proposal ID	084164
Title	Using XMM-Newton to study a massive white dwarf merger
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0841640101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0841640201
DOI	https://doi.org/10.5270/esa-5ntxdcj
Principal Investigator, PI	Dr Lidia Oskinova
Abstract	We propose a 25 ks observation of a recently discovered unique hydrogen- andhelium-free hot star, Cas J005311, with a record wind velocity of 5 per cent ofthe speed of light. Cas J005311 is likely a super-Chandrasekhar masscarbon-oxygen white dwarf which is a result of a merger. We propose a decisivedetection experiment aimed to verify the theory of magnetically supported windsfrom fast rotating supermassive white dwarfs. The XMM-Newton discovery of X-raysfrom Cas J005311 will have profound consequences for our understanding of whitedwarf mergers and the origin of fast-rotating and magnetic stars.
Publications	X-rays observations of a super-Chandrasekhar object reveal an ONe and a CO white dwarf merger product embedded in a putative SN Iax remnant \|Oskinova, Lidia M., Gvaramadze, Vasilii V., et al. \| A&A \| 644-8 \| 2020 \| 2020A&A...644L...8O \| http://ui.adsabs.harvard.edu/#abs/2020A&A...644L...8O The Remnant and Origin of the Historical Supernova 1181 AD \|Ritter, Andreas, Parker, Quentin A., et al. \| ApJ \| 918-33 \| 2021 \| 2021ApJ...918L..33R \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...918L..33R A New Study on a Type Iax Stellar Remnant and its Probable Association with SN 1181 \|Lykou, Foteini, Parker, Quentin A., et al. \| ApJ \| 944-120 \| 2023 \| 2023ApJ...944..120L \| http://ui.adsabs.harvard.edu/#abs/2023ApJ...944..120L The path from the Chinese and Japanese observations of supernova 1181 AD, to a Type Iax supernova, to the merger of CO and ONe white dwarfs \|Schaefer, Bradley E., \| MNRAS \| 523-3885 \| 2023 \| 2023MNRAS.523.3885S \| http://ui.adsabs.harvard.edu/#abs/2023MNRAS.523.3885S 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	2019-07-08T02:32:57Z/2019-07-24T07:19:47Z
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	2020-08-21T22:00:00Z
Keywords	"XMM", "xmm newton discovery", "magnetically supported winds", "magnetic stars", "XMM-Newton", "white dwarf mergers", "fast rotating", "cas j005311", "xmm newton", "record wind velocity"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Lidia Oskinova, 2020, 'Using XMM-Newton to study a massive white dwarf merger', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-5ntxdcj