A dataset provided by the European Space Agency

Name: Wolf-Rayet 1: A Study of X-ray Production from a Structured and Massive Wind
Published: 2010-03-06T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	055222
Title	Wolf-Rayet 1: A Study of X-ray Production from a Structured and Massive Wind
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0552220101
DOI	https://doi.org/10.5270/esa-rbdqxe0
Principal Investigator, PI	Dr Richard Ignace
Abstract	Our target is the nitrogen-rich Wolf-Rayet (WR) star (= HD4004) that hasrecently been shown to display line-profile variability with a period of 7.7days, similar in nature to the 3.8 day period variability long known for WR6 (=EZ CMa = HD50896). For neither star is binarity thought to be the culprit of theperiodic variability; instead, large scale wind asymmetry is invoked. We arerequesting three 20 ksec EPIC pointings of WR1, roughly equally spaced in phase.We seek to detect X-ray variability as a means of characterizing the nature ofthe globally coherent wind structure.
Publications	New X-Ray Detections of WNL Stars \|Skinner Stephen L. Zhekov Svetozar A. et al. \| AJ \| 143-116 \| 2012 \| 2012AJ....143..116S \| http://ui.adsabs.harvard.edu/#abs/2012AJ....143..116S 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 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 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 New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2009-02-04T21:24:18Z/2009-02-05T04:42:21Z
Version	21.51_20241115_1113
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	2010-03-06T00:00:00Z
Last Update	2026-07-09
Keywords	"periodic variability", "wolf rayet", "epic pointings", "roughly equally spaced", "EPIC", "xray variability", "massive wind", "ez cma", "scale wind asymmetry", "period variability", "xray production"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Richard Ignace, 2010, 'Wolf-Rayet 1: A Study of X-ray Production from a Structured and Massive Wind', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-rbdqxe0
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.