Physics and Astronomy Faculty Publications and Presentations

Document Type

Article

Publication Date

12-2024

Abstract

We studied the spectral energy distribution of 22 known AM CVns with orbital periods (Porb) larger than 35 minutes 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 Porb, as expected by evolutionary models. Temperatures for systems with 35 < Porb < 45 minutes are consistent with models. Systems with Porb ≳ 45 minutes have higher temperatures than expected. The second blackbody temperature does not correlate with Porb.

Comments

Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Title

Research Notes of the AAS

DOI

10.3847/2515-5172/ad9a64

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