A dataset provided by the European Space Agency

Name: The stellar wind of hot subdwarf stars
Published: 2012-09-13T00:00:00Z

Proposal ID	067139
Title	The stellar wind of hot subdwarf stars
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0671390101
DOI	https://doi.org/10.5270/esa-vv7pyiu
Principal Investigator, PI	Dr Nicola La Palombara
Abstract	All we know about hot subdwarf (sd) stars is based on studies in the optical andUV domain, while none of them has been detected at X-rays. The only exception isthe sdO binary HD49798, in which the WD companion shows a significant X-rayemission, due to the matter accreted from the sd primary. A recent XMMobservation of this source has revealed a significant X-ray emission also duringthe eclipse phase, when the WD is obscured by the primary subdwarf, thussuggesting that the observed X-ray flux is due to the subdwarf itself. In orderto investigate if also other sdO stars are characterized by an intrinsic X-rayemission, we propose to observe BD+37 442: it is a nearby and bright sdO starwith a strong stellar wind, therefore it is the best candidate to perform this type of search.
Publications	Discovery of a Compact Companion to the Hot Subdwarf Star BD +37 442 \|La Palombara, Nicola, Mereghetti, Sandro, et al. \| ApJ \| 750-34 \| 2012 \| 2012ApJ...750L..34L \| http://ui.adsabs.harvard.edu/#abs/2012ApJ...750L..34L Observations of the Unique X--ray Emitting Subdwarf Stars HD 49798 and BD +37 442 \|La Palombara, N., Mereghetti, S., et al. \| CEAB \| 37-267 \| 2013 \| 2013CEAB...37..267L \| http://ui.adsabs.harvard.edu/#abs/2013CEAB...37..267L 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 News on the X-ray emission from hot subdwarf stars \|Palombara, Nicola La, Mereghetti, Sandro, \| OAst \| 26-187 \| 2017 \| 2017OAst...26..187P \| http://ui.adsabs.harvard.edu/#abs/2017OAst...26..187P 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	2011-08-21T23:52:42Z/2011-08-22T09:11:23Z
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	2012-09-13T00:00:00Z
Keywords	"wd companion", "eclipse phase", "sd primary", "XMM", "bright sdo star", "sdo binary hd49798", "sdo stars", "uv domain", "primary subdwarf", "xray flux", "stellar wind", "matter accreted", "xray emission", "hot subdwarf stars"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Nicola La Palombara, 2012, 'The stellar wind of hot subdwarf stars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vv7pyiu