A dataset provided by the European Space Agency

Name: Probing the extremes of the Lx-Lbol relation of O-stars
Published: 2015-09-19T22:00:00Z

Proposal ID	074002
Title	Probing the extremes of the Lx-Lbol relation of O-stars
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740020101
DOI	https://doi.org/10.5270/esa-1i69jji
Principal Investigator, PI	Prof Gregor Rauw
Abstract	We propose to probe the Lx/Lbol relation of O-type stars in the young opencluster IC 1805. This cluster hosts a very rare and extreme O4If^+ star (HD15570), i.e. a transition object between normal O-stars and evolved Wolf-Rayetstars. Theoretical models predict that such transition stars should have aweaker X-ray emission than less extreme O-star, with a log(Lx/Lbol) intermediatebetween the -7 value of O-stars and the much lower value obtained for Wolf-Rayetstars. IC 1805 offers the unique opportunity to test this scenario on ahomogeneous population of O-stars (same distance, same age, samemetallicity,...).
Publications	X-ray and optical spectroscopy of the massive young open cluster IC 1805 \|Rauw G. Naze Y. \| A&A \| 594-82 \| 2016 \| 2016A&A...594A..82R \| http://ui.adsabs.harvard.edu/#abs/2016A&A...594A..82R 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 An Optical and Infrared Photometric Study of the Young Open Cluster IC 1805 in the Giant H ii Region W4 &dagger \|Sung Hwankyung Bessell Michael S. et al. \| ApJS \| 230-3 \| 2017 \| 2017ApJS..230....3S \| http://ui.adsabs.harvard.edu/#abs/2017ApJS..230....3S Is the Pollocks paradigm of X-ray emission for O stars correct? \|Ryspaeva E. B. Kholtygin A. F. \| AN \| 338-959 \| 2017 \| 2017AN....338..959R \| http://ui.adsabs.harvard.edu/#abs/2017AN....338..959R Analysis of the X-ray emission of OB stars: O stars \|Ryspaeva Elizaveta Kholtygin Alexander \| RAA \| 18-104 \| 2018 \| 2018RAA....18..104R \| http://ui.adsabs.harvard.edu/#abs/2018RAA....18..104R 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 value-added catalogue of ASAS-SN eclipsing binaries: parameters of 30 000 detached systems \|Rowan D. M. Jayasinghe T. et al. \| MNRAS \| 517-2190 \| 2022 \| 2022MNRAS.517.2190R \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.517.2190R 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	2014-08-25T20:50:00Z/2014-08-26T10:43:20Z
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	2015-09-19T22:00:00Z
Last Update	2025-01-27
Keywords	"....", "transition object", "lbol intermediate", "transition stars", "lx lbol relation", "models predict", "type stars", "wolf rayet stars", "weaker xray emission", "ic 1805", "cluster ic 1805", "lbol relation", "homogeneous population", "lower value", "cluster hosts", "metallicity "
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Gregor Rauw, 2015, 'Probing the extremes of the Lx-Lbol relation of O-stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1i69jji