A dataset provided by the European Space Agency

Name: A follow-up study of the colliding wind binary Cyg OB2 8a
Published: 2008-12-11T00:00:00Z

Proposal ID	050511
Title	A follow-up study of the colliding wind binary Cyg OB2 8a
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505110301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505110401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505110501
DOI	https://doi.org/10.5270/esa-byh57pf
Principal Investigator, PI	Dr Gregor Rauw
Abstract	We propose to observe the colliding wind binary Cyg OB2 #8a (O6If + O5.5III(f))for 3 x 20 ksec near specific orbital phases. Previous XMM-Newton observationsrevealed a modulation of the X-ray flux of this system. At the same time, theradio emission of Cyg OB2 #8a also undergoes a phase-locked variation. The jointanalysis of the variations in the X-ray and radio domains will provideunprecedented information on the interplay between colliding wind interactionsand the acceleration of relativistic particles that produce the non-thermalradio emission. The Cyg OB2 cluster further harbours a number of early-typestars (two of them are non-thermal radio emitters) that are bright X-raysources, as well as a wealth of secondary sources (most of them being low-mass PMS stars).
Publications	A multiwavelength investigation of the massive eclipsing binary Cygnus OB2 #5 \|Linder, N., Rauw, G., et al. \| A&A \| 495-231 \| 2009 \| 2009A&A...495..231L \| http://ui.adsabs.harvard.edu/#abs/2009A&A...495..231L Non-thermal radio emission from O-type stars. IV. Cygnus OB2 No. 8A \|Blomme, R., De Becker, M., et al. \| A&A \| 519-111 \| 2010 \| 2010A&A...519A.111B \| http://ui.adsabs.harvard.edu/#abs/2010A&A...519A.111B First Orbital Solution for the Non-thermal Emitter Cyg OB2 No. 9 \|Naze, Y., Damerdji, Y., et al. \| ApJ \| 719-634 \| 2010 \| 2010ApJ...719..634N \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...719..634N The XMM Cluster Survey: optical analysis methodology and the first data release \|Mehrtens, Nicola, Romer, A. Kathy, et al. \| MNRAS \| 423-1024 \| 2012 \| 2012MNRAS.423.1024M \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.423.1024M 3D models of radiatively driven colliding winds in massive O + O star binaries - III. Thermal X-ray emission \|Pittard, J. M., Parkin, E. R., \| MNRAS \| 403-1657 \| 2010 \| 2010MNRAS.403.1657P \| http://ui.adsabs.harvard.edu/#abs/2010MNRAS.403.1657P A multi-epoch XMM-Newton campaign on the core of the massive Cygnus OB2 association \|Rauw, G., \| A&A \| 536-31 \| 2011 \| 2011A&A...536A..31R \| http://ui.adsabs.harvard.edu/#abs/2011A&A...536A..31R An All-Sky Atlas of Radio/X-ray Associations \|Flesch, E., \| PASA \| 27-283 \| 2010 \| 2010PASA...27..283F \| http://ui.adsabs.harvard.edu/#abs/2010PASA...27..283F The XMM Cluster Survey: X-ray analysis methodology \|Lloyd-Davies, E. J., Romer, A. Kathy, et al. \| MNRAS \| 418-14 \| 2011 \| 2011MNRAS.418...14L \| http://ui.adsabs.harvard.edu/#abs/2011MNRAS.418...14L Exospheric solar wind charge exchange as seen by XMM-Newton \|Carter, J. A., Semba, S., \| AN \| 333-313 \| 2012 \| 2012AN....333..313C \| http://ui.adsabs.harvard.edu/#abs/2012AN....333..313C Classification of X-Ray Sources in the XMM-Newton Serendipitous Source Catalog \|Lin, Dacheng, Webb, Natalie A., \| ApJ \| 756-27 \| 2012 \| 2012ApJ...756...27L \| http://ui.adsabs.harvard.edu/#abs/2012ApJ...756...27L The 2.35 year itch of Cygnus OB2 #9. I. Optical and X-ray monitoring \|Naze, Y., Mahy, L., et al. \| A&A \| 546-37 \| 2012 \| 2012A&A...546A..37N \| http://ui.adsabs.harvard.edu/#abs/2012A&A...546A..37N Hot stars observed by XMM-Newton. I. The catalog and the properties of OB stars \|Naze, Y., \| A&A \| 506-1055 \| 2009 \| 2009A&A...506.1055N \| http://ui.adsabs.harvard.edu/#abs/2009A&A...506.1055N Wind collisions in three massive stars of Cygnus OB2 \|Cazorla, Constantin, Naze, Yael, \| A&A \| 561-92 \| 2014 \| 2014A&A...561A..92C \| http://ui.adsabs.harvard.edu/#abs/2014A&A...561A..92C The diversity of quasars unified by accretion and orientation \|Shen, Yue, Ho, Luis C., \| Natur \| 513-210 \| 2014 \| 2014Natur.513..210S \| http://ui.adsabs.harvard.edu/#abs/2014Natur.513..210S 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 Sunyaev-Zel.dovich effect or not? Detecting the main foreground effect of most galaxy clusters \|Xiao, Weike, Chen, Chen, et al. \| MNRAS \| 432-41 \| 2013 \| 2013MNRAS.432L..41X \| http://ui.adsabs.harvard.edu/#abs/2013MNRAS.432L..41X 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 Observation of the Cygnus OB2 Association with Suzaku and Long Term Light Curves \|Yoshida, Masaki, Kitamoto, Shunji, \| PASJ \| 63-717 \| 2011 \| 2011PASJ...63S.717Y \| http://ui.adsabs.harvard.edu/#abs/2011PASJ...63S.717Y On the Binary Nature of Massive Blue Hypergiants: High-resolution X-Ray Spectroscopy Suggests That Cyg OB2 12 is a Colliding Wind Binary \|Oskinova, L. M., Huenemoerder, D. P., et al. \| ApJ \| 845-39 \| 2017 \| 2017ApJ...845...39O \| http://ui.adsabs.harvard.edu/#abs/2017ApJ...845...39O Anisotropy of the galaxy cluster X-ray luminosity-temperature relation \|Migkas, Konstantinos, Reiprich, Thomas H., \| A&A \| 611-50 \| 2018 \| 2018A&A...611A..50M \| http://ui.adsabs.harvard.edu/#abs/2018A&A...611A..50M The XMM Cluster Survey: Present status and latest results \|Viana, P. T. P., Mehrtens, N., et al. \| AN \| 334-462 \| 2013 \| 2013AN....334..462V \| http://ui.adsabs.harvard.edu/#abs/2013AN....334..462V A first orbital solution for the non-thermal radio emitter Cyg OB2 #9 \|Naze, Y., Damerdji, Y., et al. \| BSRSL \| 80-709 \| 2011 \| 2011BSRSL..80..709N \| http://ui.adsabs.harvard.edu/#abs/2011BSRSL..80..709N Quest for the tertiary component in Cyg OB2 #5 \|Rauw, Gregor, Naze, Yael, \| A&A \| 627-2 \| 2019 \| 2019A&A...627A...2R \| http://ui.adsabs.harvard.edu/#abs/2019A&A...627A...2R Variations on a theme: the puzzling behaviour of Schulte 12 \|Naze, Yael, Rauw, Gregor, et al. \| A&A \| 627-99 \| 2019 \| 2019A&A...627A..99N \| http://ui.adsabs.harvard.edu/#abs/2019A&A...627A..99N Testing emergent gravity on galaxy cluster scales \|Tamosiunas, Andrius, Bacon, David, et al. \| JCAP \| 5-53 \| 2019 \| 2019JCAP...05..053T \| http://ui.adsabs.harvard.edu/#abs/2019JCAP...05..053T Chandra Follow-up of the SDSS DR8 Redmapper Catalog Using the MATCha Pipeline \|Hollowood, Devon L., Jeltema, Tesla, et al. \| ApJS \| 244-22 \| 2019 \| 2019ApJS..244...22H \| http://ui.adsabs.harvard.edu/#abs/2019ApJS..244...22H Stellar mass as a galaxy cluster mass proxy: application to the Dark Energy Survey redMaPPer clusters \|Palmese, A., Annis, J., et al. \| MNRAS \| 493-4591 \| 2020 \| 2020MNRAS.493.4591P \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.493.4591P Search for non-thermal X-ray emission in the colliding wind binary Cygnus OB2 #8A \|Mossoux, E., Pittard, J. M., et al. \| A&A \| 636-109 \| 2020 \| 2020A&A...636A.109M \| http://ui.adsabs.harvard.edu/#abs/2020A&A...636A.109M 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 EXTraS project: Exploring the X-ray transient and variable sky \|De Luca, A., Salvaterra, R., et al. \| A&A \| 650-167 \| 2021 \| 2021A&A...650A.167D \| http://ui.adsabs.harvard.edu/#abs/2021A&A...650A.167D 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	2007-04-29T16:23:01Z/2007-05-03T20:37:49Z
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	2008-12-11T00:00:00Z
Keywords	"specific orbital phases", "colliding wind interactions", "secondary sources", "relativistic particles", "bright xray sources", "phase locked variation", "XMM", "xmm newton", "xray flux", "nonthermal radio emitters", "radio domains", "XMM-Newton", "radio emission", "8a o6if", "nonthermal radio emission", "type stars", "cyg ob2", "cyg ob2 cluster"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Gregor Rauw, 2008, 'A follow-up study of the colliding wind binary Cyg OB2 8a', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-byh57pf