Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29549
Title: | NuSTAR and XMM-Newton Observations of 1E1743.1-2843: Indications of a Neutron Star LMXB Nature of the Compact Object | Authors: | LOTTI, Simone NATALUCCI, LORENZO Mori, Kaya Baganoff, Frederick K. Boggs, Steven E. Christensen, Finn E. Craig, William W. Hailey, Charles J. Harrison, Fiona A. Hong, Jaesub Krivonos, Roman A. Rahoui, Farid Stern, Daniel Tomsick, John A. Zhang, Shuo Zhang, William W. |
Issue Date: | 2016 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 822 | Issue: | 1 | First Page: | 57 | Abstract: | We report on the results of NuSTAR and XMM-Newton observations of the persistent X-ray source 1E1743.1-2843, located in the Galactic Center region. The source was observed between 2012 September and October by NuSTAR and XMM-Newton, providing almost simultaneous observations in the hard and soft X-ray bands. The high X-ray luminosity points to the presence of an accreting compact object. We analyze the possibilities of this accreting compact object being either a neutron star (NS) or a black hole, and conclude that the joint XMM-Newton and NuSTAR spectrum from 0.3 to 40 keV fits a blackbody spectrum with {kT}∼ 1.8 {keV} emitted from a hot spot or an equatorial strip on an NS surface. This spectrum is thermally Comptonized by electrons with {{kT}}<SUB>e</SUB>∼ 4.6 {keV}. Accepting this NS hypothesis, we probe the low-mass X-ray binary (LMXB) or high-mass X-ray binary (HMXB) nature of the source. While the lack of Type-I bursts can be explained in the LMXB scenario, the absence of pulsations in the 2 mHz-49 Hz frequency range, the lack of eclipses and of an IR companion, and the lack of a {K}<SUB>α </SUB> line from neutral or moderately ionized iron strongly disfavor interpreting this source as a HMXB. We therefore conclude that 1E1743.1-2843 is most likely an NS-LMXB located beyond the Galactic Center. There is weak statistical evidence for a soft X-ray excess which may indicate thermal emission from an accretion disk. However, the disk normalization remains unconstrained due to the high hydrogen column density ({N}<SUB>{{H</SUB>}}∼ 1.6× {10}<SUP>23</SUP> {{cm}}<SUP>-2</SUP>). | URI: | http://hdl.handle.net/20.500.12386/29549 | URL: | https://iopscience.iop.org/article/10.3847/0004-637X/822/1/57 | ISSN: | 0004-637X | DOI: | 10.3847/0004-637X/822/1/57 | Bibcode ADS: | 2016ApJ...822...57L | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
NuSTAR and XMM-Newton observations of the 1E1743.1-2843 source.pdf | pdf editoriale | 1.74 MB | Adobe PDF | View/Open |
1603.02016.pdf | preprint | 1.86 MB | Adobe PDF | View/Open |
Page view(s)
59
checked on Mar 28, 2024
Download(s)
27
checked on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.