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Originalpublikation
Nieder, L.; Kerr, M.; Clark, C.J.; Bruel, P.; Cromartie, H.T. et al.: Is the Black-widow Pulsar PSR J1555-2908 in a Hierarchical Triple System?. In: The astrophysical journal : Part 2, Letters 931 (2022), Nr. 1, L3. DOI: https://doi.org/10.3847/2041-8213/ac6b35
Version im Repositorium
Zum Zitieren der Version im Repositorium verwenden Sie bitte diesen DOI:
https://doi.org/10.15488/12867
| Zusammenfassung: | |
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The 559 Hz black-widow pulsar PSR J1555-2908, originally discovered in radio, is also a bright gamma-ray pulsar. Timing its pulsations using 12 yr of Fermi-Large Area Telescope gamma-ray data reveals long-term variations in its spin frequency that are much larger than is observed from other millisecond pulsars. While this variability in the pulsar rotation rate could be intrinsic "timing noise,"here we consider an alternative explanation: the variations arise from the presence of a very-low-mass third object in a wide multiyear orbit around the neutron star and its low-mass companion. With current data, this hierarchical-triple-system model describes the pulsar's rotation slightly more accurately than the best-fitting timing noise model. Future observations will show if this alternative explanation is correct. © 2022. The Author(s). Published by the American Astronomical Society.
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| Lizenzbestimmungen: | CC BY 4.0 Unported - https://creativecommons.org/licenses/by/4.0/ |
| Publikationstyp: | Article |
| Publikationsstatus: | publishedVersion |
| Erstveröffentlichung: | 2022 |
| Schlagwörter (englisch): | Large-Area Telescope, Millisecond Pulsar, Planets, Discovery, Search, Noise, Mass |
| Fachliche Zuordnung (DDC): | 520 | Astronomie, Kartographie |
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