A dataset provided by the European Space Agency

Name: The X-ray emission of the sdO star BD+37 1977
Published: 2015-05-16T22:00:00Z

Proposal ID	074014
Title	The X-ray emission of the sdO star BD+37 1977
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740140301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740140401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740140501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740140601 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740140701
DOI	https://doi.org/10.5270/esa-zohp34t
Principal Investigator, PI	Mr Nicola La Palombara
Abstract	While several hot subdwarf stars have been deeply investigated in the opticaland UV domain, up to very recent times only the sdO stars HD49798 and BD+37 442had been detected at X-rays. Both sources are characterized by comparablespectral and timing properties; in particular, the flux shows a fast periodicmodulation, likely due to wind accretion from the sdO star onto a WD or NScompanion. In the latest months the first systematic search for X-ray emissionfrom a complete flux-limited sample of sdO stars, performed by Chandra, hasprovided a detection also of the sdO star BD+37 1977. Now we propose to observethis star with XMM: our aim is to characterize in detail its spectral X-rayproperties and to investigate if it is intrinsic or due to an accreting compact companion.
Publications	Follow-up observations of X-ray emitting hot subdwarf stars: the He-rich sdO BD +37 1977 \|La Palombara, N., Esposito, P., et al. \| A&A \| 580-56 \| 2015 \| 2015A&A...580A..56L \| http://ui.adsabs.harvard.edu/#abs/2015A&A...580A..56L XMM-Newton publication statistics \|Ness, J.-U., Parmar, A. N., et al. \| AN \| 335-210 \| 2014 \| 2014AN....335..210N \| http://ui.adsabs.harvard.edu/#abs/2014AN....335..210N 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 A Comparison of X-Ray Photon Indices among the Narrow- and Broad-line Seyfert 1 Galaxies \|Ojha, Vineet, Chand, Hum, et al. \| ApJ \| 896-95 \| 2020 \| 2020ApJ...896...95O \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...896...95O 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 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	2014-04-14T15:00:25Z/2014-04-24T18:40:04Z
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	2015-05-16T22:00:00Z
Keywords	"sdo star", "deeply investigated", "wind accretion", "sdo stars hd49798", "XMM", "ns companion", "sdo stars", "uv domain", "sdo star bd", "accreting compact companion", "fast periodic modulation", "comparable spectral", "xray emission", "spectral xray properties", "hot subdwarf stars", "systematic search"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Mr Nicola La Palombara, 2015, 'The X-ray emission of the sdO star BD+37 1977', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zohp34t