A dataset provided by the European Space Agency

Name: A Search for Coronal Activity Among Metal-Poor Subdwarfs
Published: 2016-04-14T22:00:00Z

Proposal ID	074168
Title	A Search for Coronal Activity Among Metal-Poor Subdwarfs
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0741680101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0741680201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0741680301
DOI	https://doi.org/10.5270/esa-or8ofe8
Principal Investigator, PI	Prof Graeme Smith
Abstract	We propose to search for coronal soft x-ray emission from several of the oldestmain sequence stars in the Galaxy. Our program stars have been pre-selected fromground-based observations to have He I 10830 Ang absorption lines with anequivalent width of 30 mA or more. If such stars follow a relation between He Iequivalent width and soft x-ray flux applicable to Population I dwarf stars,then they would be expected to have x-ray luminosities 5e-7 times theirbolometric luminosity, and as such would yield detectable sources in 20 ksexposures with the EPIC-pn camera on XMM-Newton. Our proposal seeks to push thedetection of coronal activity to the lowest stellar metallicities yet surveyed,namely Fe/H ~ -2.0 dex.
Publications	A Search for Coronal Activity Among Two Metal-poor Subdwarfs and One Subgiant \|Smith Graeme H. Dupree Andrea K. \| AJ \| 152-43 \| 2016 \| 2016AJ....152...43S \| http://ui.adsabs.harvard.edu/#abs/2016AJ....152...43S 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 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	2014-08-01T21:21:30Z/2015-03-17T01:16:14Z
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	2016-04-14T22:00:00Z
Last Update	2025-01-27
Keywords	"main sequence stars", "EPIC", "xray luminosities 5e", "bolometric luminosity", "epic pn camera", "xmm newton", "lowest stellar metallicity", "equivalent width", "XMM-Newton", "dwarf stars", "program stars", "detectable sources", "XMM", "coronal activity"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Graeme Smith, 2016, 'A Search for Coronal Activity Among Metal-Poor Subdwarfs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-or8ofe8