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
Last Update	2025-01-27
Keywords	"fast rotating", "white dwarf mergers", "xmm newton", "XMM-Newton", "cas j005311", "XMM", "magnetic stars", "record wind velocity", "magnetically supported winds", "xmm newton discovery"
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