A dataset provided by the European Space Agency

Name: X-ray Investigation of Origin of Dust Disks around Hot White Dwarfs
Published: 2013-04-04T00:00:00Z

Proposal ID	067335
Title	X-ray Investigation of Origin of Dust Disks around Hot White Dwarfs
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0673350201
DOI	https://doi.org/10.5270/esa-7kg9inz
Principal Investigator, PI	Prof You-Hua Chu
Abstract	The Helix Nebulas central white dwarf (WD) exhibits hard X-rays and strongmid-IR emission not expected from its photosphere. Analyses of Spitzerphotometric and spectral observations suggest the presence of a dust disk atr=50-100 AU. Accretion of this circumstellar dust onto the WDs surface may powerthe hard X-ray emission. We have found additional 9 WDs with 24 um excesseswhich may also originate from dust disks. We request EPIC observations of the 4closest hot WD with mid-IR excesses to help determine whether there is a causalconnection between the mid-IR excess and hard X-ray emission. The X-rayluminosities, spectra, and temporal variations will be used to evaluate whetheraccretion powers the hard X-ray emission.
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 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 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	2012-03-05T12:08:49Z/2012-03-06T00:07:48Z
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	2013-04-04T00:00:00Z
Last Update	2025-01-27
Keywords	"hard xray emission", "circumstellar dust", "spitzer photometric", "dust disk", "hard xray", "causal connection", "xray luminosities", "x ray investigation", "EPIC", "mid ir excess", "closest hot wd", "um excesses", "accretion powers", "mid ir excesses", "dust dis", "wds surface", "mid ir emission", "hot white dwarfs", "temporal variations"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof You-Hua Chu, 2013, 'X-ray Investigation of Origin of Dust Disks around Hot White Dwarfs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-7kg9inz