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October 2, 2025Astronomy and Astrophysics

Apsidal motion and proximity effects in the massive binary BD+60 497

G. Rauw Piotr A. Kołaczek-Szymański Yaël Nazé Lucas Nys

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Key Points

The binary system shows a rate of apsidal motion of 6.15 degrees per year, indicating its relative youth at 4.13 million years.
Radial velocities were established for the stars using spectroscopic data collected over two decades, revealing their orbital characteristics.
Photometric variability at the ~6 mmag level suggests influencing proximity effects and oscillations within the massive binary system.
Spectral properties of the secondary star have shifted from an earlier type in 2002-2003 to a more evolved state in 2018-2022, hinting at temperature distribution changes.

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Implication

Analysis reveals apsidal motion in a massive binary system, suggesting intricate tidal interactions and spectral changes.

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Cite This Study

Rauw et al. (2025) studied this question.

synapsesocial.com/papers/68e02f40f0e39f13e7fa2b3a https://doi.org/10.1051/0004-6361/202556197

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