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 virgul -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
Keywords	"epic pn camera", "bolometric luminosity", "XMM", "equivalent width", "program stars", "coronal activity", "dwarf stars", "detectable sources", "xray luminosities 5e", "XMM-Newton", "EPIC", "main sequence stars", "lowest stellar metallicity", "xmm newton"
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