A dataset provided by the European Space Agency

Name: Probing the high-energy properties of very early-type stars in the cluster HM1
Published: 2011-04-03T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	060008
Title	Probing the high-energy properties of very early-type stars in the cluster HM1
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0600080101
DOI	https://doi.org/10.5270/esa-xd87814
Principal Investigator, PI	Dr Yael Naze
Abstract	So far, little information has been gathered on the X-ray emission of theearliest O-type stars. To probe their high-energy properties, we propose toobserve the young cluster HM1 for the first time in the X-ray domain. Due to itshigh extinction, this object is notoriously difficult to observe at otherwavelengths and it has thus been poorly studied up to now. However, observingHM1 provides access to 5 very early O stars, 2 WRs, and about 20 late O/early Bobjects. HM1 therefore allows a study of the $L_X-L_{BOL}$ relation of theearliest spectral types and constitutes a unique probe into the X-ray emissionof WN stars and early O stars. In addition, new magnetic or colliding windobjects will be detected, as well as part of the PMS population of HM1.
Publications	X-ray properties of the young open clusters HM1 and IC 2944/2948 \|Naze Y. Rauw G. et al. \| A&A \| 555-83 \| 2013 \| 2013A&A...555A..83N \| http://ui.adsabs.harvard.edu/#abs/2013A&A...555A..83N 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 Fundamental parameters of the massive eclipsing binary HM1 8 \|Rodru00edguez C. N. Ferrero G. A. et al. \| MNRAS \| 508-2179 \| 2021 \| 2021MNRAS.508.2179R \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.508.2179R 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 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	2010-03-10T01:14:06Z/2010-03-10T08:42:43Z
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	2011-04-03T00:00:00Z
Last Update	2026-07-09
Keywords	"earliest spectral types", "xray domain", "pms population", "l_x l_", "wn stars", "energy properties", "bol }$ relation", "cluster hm1", "colliding wind objects", "little information", "type stars", "xray emission", "notoriously difficult"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Yael Naze, 2011, 'Probing the high-energy properties of very early-type stars in the cluster HM1', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-xd87814
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.