A dataset provided by the European Space Agency

Name: A Study of the Discontinuous Drop in X-ray Emission at Spectral Type B1
Published: 2009-04-03T00:00:00Z

Proposal ID	050350
Title	A Study of the Discontinuous Drop in X-ray Emission at Spectral Type B1
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0503500101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0503500201
DOI	https://doi.org/10.5270/esa-or3081d
Principal Investigator, PI	Dr Wayne Waldron
Abstract	B supergiants display a discontinuous drop in X-ray emission along a dividingline in the H-R diagram (analogous to the one for K giants) which is referred toas the bistability jump at spectral type B1. Our XMM study of the X-rayproperties on both sides of the jump have revealed several interesting results,but some uncertainties have arisen since B supergiant winds are thick to softX-rays, and these winds are thought to be clumpy. We now have observationalevidence that the bistabilty jump extends to the lower luminosity B giants whichhave lower wind densities. Hence, they do not have the problems that areassociated with B supergiants. Therefore we are requesting XMM EPIC observationsof 5 B giants to broaden our understanding of the B star dividing line.
Publications	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 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 A report on the X-ray properties of the tau Sco-like stars \|Ignace, R., Oskinova, L. M., \| MNRAS \| 429-516 \| 2013 \| 2013MNRAS.429..516I \| http://ui.adsabs.harvard.edu/#abs/2013MNRAS.429..516I B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars beta CMa and &epsil CMa. Possible lack of a magnetic desert in massive stars \|Fossati, L., Castro, N., et al. \| A&A \| 574-20 \| 2015 \| 2015A&A...574A..20F \| http://ui.adsabs.harvard.edu/#abs/2015A&A...574A..20F On X-ray pulsations in beta Cephei-type variables \|Oskinova, L. M., Todt, H., et al. \| A&A \| 577-32 \| 2015 \| 2015A&A...577A..32O \| http://ui.adsabs.harvard.edu/#abs/2015A&A...577A..32O 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 B stars seen at high resolution by XMM-Newton \|Cazorla, Constantin, Naze, Yael, \| A&A \| 608-54 \| 2017 \| 2017A&A...608A..54C \| http://ui.adsabs.harvard.edu/#abs/2017A&A...608A..54C 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 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 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 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	2008-03-06T15:51:03Z/2008-03-12T22:06:49Z
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	2009-04-03T00:00:00Z
Keywords	"bistabilty jump extends", "xray properties", "XMM", "lower wind densities", "EPIC", "spectral type b1", "dividing line", "lower luminosity", "discontinuous drop", "bistability jump", "soft xray", "supergiant winds", "requesting xmm epic", "xray emission", "star dividing line", "supergiants display", "diagram analogous"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Wayne Waldron, 2009, 'A Study of the Discontinuous Drop in X-ray Emission at Spectral Type B1', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-or3081d