A new radio census of neutron star X-ray binaries
<p>We report new radio observations of a sample of 36 neutron star (NS) X-ray binaries, more than doubling the sample in the literature observed at current-day sensitivities. These sources include 13 weakly magnetized (<em>B</em> < 10<sup>10</sup>&nb...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Oxford University Press
2021
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| _version_ | 1797107954486345728 |
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| author | van den Eijnden, J Degenaar, N Russell, TD Wijnands, R Bahramian, A Miller-Jones, JCA Santisteban, JVH Gallo, E Atri, P Plotkin, RM Maccarone, TJ Sivakoff, G Miller, JM Reynolds, M Russell, DM Maitra, D Heinke, CO Padilla, MA Shaw, AW |
| author_facet | van den Eijnden, J Degenaar, N Russell, TD Wijnands, R Bahramian, A Miller-Jones, JCA Santisteban, JVH Gallo, E Atri, P Plotkin, RM Maccarone, TJ Sivakoff, G Miller, JM Reynolds, M Russell, DM Maitra, D Heinke, CO Padilla, MA Shaw, AW |
| author_sort | van den Eijnden, J |
| collection | OXFORD |
| description | <p>We report new radio observations of a sample of 36 neutron star (NS) X-ray binaries, more than doubling the sample in the literature observed at current-day sensitivities. These sources include 13 weakly magnetized (<em>B</em> < 10<sup>10</sup> G) and 23 strongly magnetized (<em>B</em> ≥ 10<sup>10</sup> G) NSs. 16 of the latter category reside in high-mass X-ray binaries, of which only two systems were radio-detected previously. We detect four weakly and nine strongly magnetized NSs; the latter are systematically radio fainter than the former and do not exceed <em>L<sub>R</sub></em> ≈ 3 × 10<sup>28</sup> erg s<sup>−1</sup>. In turn, we confirm the earlier finding that the weakly magnetized NSs are typically radio fainter than accreting stellar-mass black holes. While an unambiguous identification of the origin of radio emission in high-mass X-ray binaries is challenging, we find that in all but two detected sources (Vela X-1 and 4U 1700-37) the radio emission appears more likely attributable to a jet than the donor star wind. The strongly magnetized NS sample does not reveal a global correlation between X-ray and radio luminosity, which may be a result of sensitivity limits. Furthermore, we discuss the effect of NS spin and magnetic field on radio luminosity and jet power in our sample. No current model can account for all observed properties, necessitating the development and refinement of NS jet models to include magnetic field strengths up to 10<sup>13</sup> G. Finally, we discuss jet quenching in soft states of NS low-mass X-ray binaries, the radio non-detections of all observed very-faint X-ray binaries in our sample, and future radio campaigns of accreting NSs.</p> |
| first_indexed | 2024-03-07T07:22:46Z |
| format | Journal article |
| id | oxford-uuid:5b4b8379-bc19-4427-8528-5d5745e52c43 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:22:46Z |
| publishDate | 2021 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:5b4b8379-bc19-4427-8528-5d5745e52c432022-10-25T11:50:02ZA new radio census of neutron star X-ray binariesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5b4b8379-bc19-4427-8528-5d5745e52c43EnglishSymplectic ElementsOxford University Press2021van den Eijnden, JDegenaar, NRussell, TDWijnands, RBahramian, AMiller-Jones, JCASantisteban, JVHGallo, EAtri, PPlotkin, RMMaccarone, TJSivakoff, GMiller, JMReynolds, MRussell, DMMaitra, DHeinke, COPadilla, MAShaw, AW<p>We report new radio observations of a sample of 36 neutron star (NS) X-ray binaries, more than doubling the sample in the literature observed at current-day sensitivities. These sources include 13 weakly magnetized (<em>B</em> < 10<sup>10</sup> G) and 23 strongly magnetized (<em>B</em> ≥ 10<sup>10</sup> G) NSs. 16 of the latter category reside in high-mass X-ray binaries, of which only two systems were radio-detected previously. We detect four weakly and nine strongly magnetized NSs; the latter are systematically radio fainter than the former and do not exceed <em>L<sub>R</sub></em> ≈ 3 × 10<sup>28</sup> erg s<sup>−1</sup>. In turn, we confirm the earlier finding that the weakly magnetized NSs are typically radio fainter than accreting stellar-mass black holes. While an unambiguous identification of the origin of radio emission in high-mass X-ray binaries is challenging, we find that in all but two detected sources (Vela X-1 and 4U 1700-37) the radio emission appears more likely attributable to a jet than the donor star wind. The strongly magnetized NS sample does not reveal a global correlation between X-ray and radio luminosity, which may be a result of sensitivity limits. Furthermore, we discuss the effect of NS spin and magnetic field on radio luminosity and jet power in our sample. No current model can account for all observed properties, necessitating the development and refinement of NS jet models to include magnetic field strengths up to 10<sup>13</sup> G. Finally, we discuss jet quenching in soft states of NS low-mass X-ray binaries, the radio non-detections of all observed very-faint X-ray binaries in our sample, and future radio campaigns of accreting NSs.</p> |
| spellingShingle | van den Eijnden, J Degenaar, N Russell, TD Wijnands, R Bahramian, A Miller-Jones, JCA Santisteban, JVH Gallo, E Atri, P Plotkin, RM Maccarone, TJ Sivakoff, G Miller, JM Reynolds, M Russell, DM Maitra, D Heinke, CO Padilla, MA Shaw, AW A new radio census of neutron star X-ray binaries |
| title | A new radio census of neutron star X-ray binaries |
| title_full | A new radio census of neutron star X-ray binaries |
| title_fullStr | A new radio census of neutron star X-ray binaries |
| title_full_unstemmed | A new radio census of neutron star X-ray binaries |
| title_short | A new radio census of neutron star X-ray binaries |
| title_sort | new radio census of neutron star x ray binaries |
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