A dataset provided by the European Space Agency

Name: Detecting the orbital period decay of HMCnc: G.W. emission vs magnetic stresses
Published: 2013-10-31T00:00:00Z

Proposal ID	069042
Title	Detecting the orbital period decay of HMCnc: G.W. emission vs magnetic stresses
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0690420101
DOI	https://doi.org/10.5270/esa-qyjzaur
Principal Investigator, PI	Prof Gian Luca Israel
Abstract	HMCnc is a system hosting two white dwarfs and has the shortest known orbital period (321s). The X-ray monitoring of this unique source over the last 16 years, made it possible to assess that the modulation is steadly decreasing at about 1ms/yr. Two competing scenarios have been suggested: the direct impact model, involving matter accretion, and the unipolar inductor, which considers the WDs as components of an electric circuit. In the former the orbital decay is expected to be ruled by GW emission only with a second period derivative of <-1E-7s/yr^2, while in the latter magnetic stresses produce a larger component. The additional pointing will allow us to achieve a sensitivity of -8E-8 s/yr^2, providing the way of undertanding the nature of HMCnc.
Publications	Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift \|Yershov, V. N., \| Ap&SS \| 354-97 \| 2014 \| 2014Ap&SS.354...97Y \| http://ui.adsabs.harvard.edu/#abs/2014Ap&SS.354...97Y Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function \|Vagnetti, F., Middei, R., et al. \| A&A \| 593-55 \| 2016 \| 2016A&A...593A..55V \| http://ui.adsabs.harvard.edu/#abs/2016A&A...593A..55V The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch, Eric W., \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F 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 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	2012-10-12T23:40:21Z/2012-10-13T08:55:39Z
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	2013-10-31T00:00:00Z
Keywords	"orbital period decay", "magnetic stresses", "matter accretion", "orbital decay", "impact model", "orbital period 321s", "unipolar inductor", "white dwarfs", "larger component", "electric circuit", "1e 7s", "period derivative", "gw emission"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Gian Luca Israel, 2013, 'Detecting the orbital period decay of HMCnc: G.W. emission vs magnetic stresses', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-qyjzaur