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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.06725 |
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| _version_ | 1866909220932157440 |
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| author | Pattie, E. C. Maccarone, T. J. Tetarenko, A. J. Miller-Jones, J. C. A. Marcano, M. Pichardo Sandoval, L. E. Rivera |
| author_facet | Pattie, E. C. Maccarone, T. J. Tetarenko, A. J. Miller-Jones, J. C. A. Marcano, M. Pichardo Sandoval, L. E. Rivera |
| contents | Ser X-1 is a low mass neutron star X-ray binary and has been persistently accreting since its discovery in the 1960s. It has always been observed to be in a soft spectral state and has never showed substantial long-term X-ray variability. Ser X-1 has one previous radio observation in the literature in which radio emission was detected during this soft state, which is contrary to the behavior of black hole X-ray binaries. We have recently obtained 10 randomly sampled radio epochs of Ser X-1 in order to further investigate its anomalous soft state radio emission. Out of 10 epochs, we find 8 non-detections and 2 detections at 10 GHz flux densities of 19.9 +/- 4.2 uJy and 32.2 +/- 3.6 uJy. We do not detect polarization in either epoch, ruling out very high polarization levels (< 63% and 34%). We compare these Ser X-1 results to other X-ray binaries and consider explanations for its long term variable radio behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_06725 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Variable radio emission of neutron star X-ray binary Ser X-1 during its persistent soft state Pattie, E. C. Maccarone, T. J. Tetarenko, A. J. Miller-Jones, J. C. A. Marcano, M. Pichardo Sandoval, L. E. Rivera High Energy Astrophysical Phenomena Ser X-1 is a low mass neutron star X-ray binary and has been persistently accreting since its discovery in the 1960s. It has always been observed to be in a soft spectral state and has never showed substantial long-term X-ray variability. Ser X-1 has one previous radio observation in the literature in which radio emission was detected during this soft state, which is contrary to the behavior of black hole X-ray binaries. We have recently obtained 10 randomly sampled radio epochs of Ser X-1 in order to further investigate its anomalous soft state radio emission. Out of 10 epochs, we find 8 non-detections and 2 detections at 10 GHz flux densities of 19.9 +/- 4.2 uJy and 32.2 +/- 3.6 uJy. We do not detect polarization in either epoch, ruling out very high polarization levels (< 63% and 34%). We compare these Ser X-1 results to other X-ray binaries and consider explanations for its long term variable radio behavior. |
| title | Variable radio emission of neutron star X-ray binary Ser X-1 during its persistent soft state |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2406.06725 |