What Are Pulsar Companions Made of? Using Gravitational Tides to Probe Their Compositions
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915929257934848 |
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| author | Colombo-Murphy, Liam Brown, Lucas Profumo, Stefano Roberts, M. Grant Westerling, Aya |
| author_facet | Colombo-Murphy, Liam Brown, Lucas Profumo, Stefano Roberts, M. Grant Westerling, Aya |
| contents | Low eccentricity, short orbital period pulsar companions may provide a probe to study novel dense and stable exoplanet internal compositions due to the potentially significant orbital evolution they experience caused by strong gravitational tides. We model the tidal characteristics such as apsidal motion constants, orbital precession, and tidal deformability for a variety of equations of state to be compared with values recovered via pulsar timing for a sample of four systems: PSR J1719-1438b, PSR J0636+5128b, PSR J2322+2650b, and PSR J1807-2459A b. With this method, we hope to place stringent limits on the chemical and structural composition of these objects. Through limiting the internal composition of pulsar companions, we aim to elucidate their unique history and formation. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_02725 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | What Are Pulsar Companions Made of? Using Gravitational Tides to Probe Their Compositions Colombo-Murphy, Liam Brown, Lucas Profumo, Stefano Roberts, M. Grant Westerling, Aya High Energy Astrophysical Phenomena Earth and Planetary Astrophysics Solar and Stellar Astrophysics High Energy Physics - Phenomenology Low eccentricity, short orbital period pulsar companions may provide a probe to study novel dense and stable exoplanet internal compositions due to the potentially significant orbital evolution they experience caused by strong gravitational tides. We model the tidal characteristics such as apsidal motion constants, orbital precession, and tidal deformability for a variety of equations of state to be compared with values recovered via pulsar timing for a sample of four systems: PSR J1719-1438b, PSR J0636+5128b, PSR J2322+2650b, and PSR J1807-2459A b. With this method, we hope to place stringent limits on the chemical and structural composition of these objects. Through limiting the internal composition of pulsar companions, we aim to elucidate their unique history and formation. |
| title | What Are Pulsar Companions Made of? Using Gravitational Tides to Probe Their Compositions |
| topic | High Energy Astrophysical Phenomena Earth and Planetary Astrophysics Solar and Stellar Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.02725 |