Graduate student Zohreh Safariforushani, along with collaborators Caty Pilachowski, Gloria Koenigsberger (UNAM), Derek Sikorski (IU B.S. Astronomy and Astrophysics 2023), and Maria Jose Cordero (IU Ph.D. 2014) recently published her study of the double-line, eclipsing binary star V505 Persei. The system consists of two nearly identical F5 main sequence stars with masses of 1.2745 and 1.2577 solar masses and temperatures near 6500 K.
Zohreh independently determined the temperatures of both components in the binary and measured element abundances for Li, Fe, Si, Na, Ca, Mn, and Ni—elements that have not previously been analyzed in detail for this system. She determined effective temperatures of Teff = 6650 ± 50 K for the primary and Teff = 6550 ± 50 K, with iron abundances of [Fe/H] = −0.10 ± 0.06 and [Fe/H] = −0.19 ± 0.07, respectively. Most [element/Fe] ratios are consistent with solar values, though manganese is slightly deficient. Her analysis of the effective temperatures helps to resolve the inconsistency of the stars’ lithium abundance suggested by earlier work, which placed the stars within the lithium dip. Zorheh’s work confirms that the stars lie on the hot edge of the lithium dip, consistent with a previous analysis by Koenigsberger et al. (2025).
The paper is available from the Astronomical Journal at https://iopscience.iop.org/article/10.3847/1538-3881/ae67f4
Figure Caption: A portion of the spectrum of V505 Persei showing absorption lines of the two stars in the system. The spectrum is shifted so that star B appears at zero velocity and the spectrum of star A is shifted to longer wavelengths due to binary motion.
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