Spectral Classification of Algol C. (arXiv:2205.06229v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Frank_M/0/1/0/all/0/1">Megan G. Frank</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Whelan_D/0/1/0/all/0/1">David G. Whelan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Junginger_J/0/1/0/all/0/1">Jessica C. Junginger</a> (Austin College)

The spectral classification of Algol C, the third star in the Algol triple
system, has long been a matter of some uncertainty. There is good reason to
suspect that it should be a metallic-line A-type star, and one study in
particular showed that this was so, but further studies have cast doubt on that
assessment. We utilized a simple spectral subtraction method between spectra
taken in and out of primary eclipse to reveal the light of Algol C in the
absence of the light from the brightest star. Our resultant spectrum is
well-matched to an F1 V spectroscopic standard and shows no evidence of
metallic-line spectral anomalies. We note that this classification matches
recent abundance determinations for this source.

The spectral classification of Algol C, the third star in the Algol triple
system, has long been a matter of some uncertainty. There is good reason to
suspect that it should be a metallic-line A-type star, and one study in
particular showed that this was so, but further studies have cast doubt on that
assessment. We utilized a simple spectral subtraction method between spectra
taken in and out of primary eclipse to reveal the light of Algol C in the
absence of the light from the brightest star. Our resultant spectrum is
well-matched to an F1 V spectroscopic standard and shows no evidence of
metallic-line spectral anomalies. We note that this classification matches
recent abundance determinations for this source.

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