Searching for pulsars associated with the Fermi GeV excess
The Fermi Large Area Telescope has detected an extended region of GeV emission towards the Galactic Centre that is currently thought to be powered by dark matter annihilation or a population of young and/or millisecond pulsars. In a test of the pulsar hypothesis, we have carried out an initial searc...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/73956 |
| _version_ | 1848763142256984064 |
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| author | Bhakta, D. Deneva, J. Frail, D. de Gasperin, F. Intema, Hubertus Jagannathan, P. Mooley, K. |
| author_facet | Bhakta, D. Deneva, J. Frail, D. de Gasperin, F. Intema, Hubertus Jagannathan, P. Mooley, K. |
| author_sort | Bhakta, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Fermi Large Area Telescope has detected an extended region of GeV emission towards the Galactic Centre that is currently thought to be powered by dark matter annihilation or a population of young and/or millisecond pulsars. In a test of the pulsar hypothesis, we have carried out an initial search of a 20 deg2 area centred on the peak of the galactic centre GeV excess. Candidate pulsars were identified as a compact, steep spectrum continuum radio source on interferometric images and followed with targeted single-dish pulsation searches. We report the discovery of the recycled pulsar PSR 1751−2737 with a spin period of 2.23 ms. PSR 1751−2737 appears to be an isolated recycled pulsar located within the disc of our Galaxy, and it is not part of the putative bulge population of pulsars that are thought to be responsible for the excess GeV emission. However, our initial success in this small pilot survey suggests that this hybrid method (i.e. wide-field interferometric imaging followed up with single-dish pulsation searches) may be an efficient alternative strategy for testing whether a putative bulge population of pulsars is responsible for the GeV excess. |
| first_indexed | 2025-11-14T10:58:45Z |
| format | Journal Article |
| id | curtin-20.500.11937-73956 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:58:45Z |
| publishDate | 2017 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-739562019-03-13T01:58:11Z Searching for pulsars associated with the Fermi GeV excess Bhakta, D. Deneva, J. Frail, D. de Gasperin, F. Intema, Hubertus Jagannathan, P. Mooley, K. The Fermi Large Area Telescope has detected an extended region of GeV emission towards the Galactic Centre that is currently thought to be powered by dark matter annihilation or a population of young and/or millisecond pulsars. In a test of the pulsar hypothesis, we have carried out an initial search of a 20 deg2 area centred on the peak of the galactic centre GeV excess. Candidate pulsars were identified as a compact, steep spectrum continuum radio source on interferometric images and followed with targeted single-dish pulsation searches. We report the discovery of the recycled pulsar PSR 1751−2737 with a spin period of 2.23 ms. PSR 1751−2737 appears to be an isolated recycled pulsar located within the disc of our Galaxy, and it is not part of the putative bulge population of pulsars that are thought to be responsible for the excess GeV emission. However, our initial success in this small pilot survey suggests that this hybrid method (i.e. wide-field interferometric imaging followed up with single-dish pulsation searches) may be an efficient alternative strategy for testing whether a putative bulge population of pulsars is responsible for the GeV excess. 2017 Journal Article http://hdl.handle.net/20.500.11937/73956 10.1093/mnras/stx656 Oxford University Press fulltext |
| spellingShingle | Bhakta, D. Deneva, J. Frail, D. de Gasperin, F. Intema, Hubertus Jagannathan, P. Mooley, K. Searching for pulsars associated with the Fermi GeV excess |
| title | Searching for pulsars associated with the Fermi GeV excess |
| title_full | Searching for pulsars associated with the Fermi GeV excess |
| title_fullStr | Searching for pulsars associated with the Fermi GeV excess |
| title_full_unstemmed | Searching for pulsars associated with the Fermi GeV excess |
| title_short | Searching for pulsars associated with the Fermi GeV excess |
| title_sort | searching for pulsars associated with the fermi gev excess |
| url | http://hdl.handle.net/20.500.11937/73956 |