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| Autori principali: | , , , , |
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| Natura: | Preprint |
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2024
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| Accesso online: | https://arxiv.org/abs/2412.05442 |
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| _version_ | 1866912153112412160 |
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| author | Macrie, Colin W. Sandoval, Liliana Rivera Cavecchi, Yuri Wong, Tin Long Sunny Marcano, Manuel Pichardo |
| author_facet | Macrie, Colin W. Sandoval, Liliana Rivera Cavecchi, Yuri Wong, Tin Long Sunny Marcano, Manuel Pichardo |
| contents | We studied the spectral energy distribution (SED) of 22 known AM~CVns with orbital periods ($P_{orb}$) larger than 35~min using multiwavelength public photometric data to estimate the effective temperature of the accreting white dwarf. We find an infrared (IR) excess in all systems when compared to a single blackbody, both when the disk should be extended and when it should be truncated by the accretor's magnetic field. This suggests a dominant contribution from the donor to the IR flux. When fitting two blackbodies, the temperature of the hot component decreases with $P_{orb}$, as expected by evolutionary models. Temperatures for systems with $35<P_{orb}<45~\text{min}$ are consistent with models. Systems with $P_{orb}\gtrsim45~\text{min}$ have higher temperatures than expected. The second blackbody temperature does not correlate with $P_{orb}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_05442 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Temperature versus Orbital Period relation of AM CVns: Insights from their Donors Macrie, Colin W. Sandoval, Liliana Rivera Cavecchi, Yuri Wong, Tin Long Sunny Marcano, Manuel Pichardo Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena We studied the spectral energy distribution (SED) of 22 known AM~CVns with orbital periods ($P_{orb}$) larger than 35~min using multiwavelength public photometric data to estimate the effective temperature of the accreting white dwarf. We find an infrared (IR) excess in all systems when compared to a single blackbody, both when the disk should be extended and when it should be truncated by the accretor's magnetic field. This suggests a dominant contribution from the donor to the IR flux. When fitting two blackbodies, the temperature of the hot component decreases with $P_{orb}$, as expected by evolutionary models. Temperatures for systems with $35<P_{orb}<45~\text{min}$ are consistent with models. Systems with $P_{orb}\gtrsim45~\text{min}$ have higher temperatures than expected. The second blackbody temperature does not correlate with $P_{orb}$. |
| title | The Temperature versus Orbital Period relation of AM CVns: Insights from their Donors |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2412.05442 |