Spectroscopic Analysis of the 2025 Eclipse of the Symbiotic Binary V1413 Aquilae

arXiv:2607.29489 · astro-ph.SR · Submitted 2026-07-31 · Read on arXiv

David Boyd, James Foster, Forrest Sims, David Cejudo, Robin Leadbeater, Pavol Dubovsky, Xavier Dupont, Keith Shank, David Trowbridge, Jerry Hinnefeld, Colin Eldridge, Joan Guarro Flo, Kevin Gurney, Gary Walker, Josch Hambsch

astro-ph.SR

Submitted: 2026-07-31

Comments: 11 pages, 17 figures

Code: https://github.com/NickMilsonPhysics/BinaryStarSolver

Project page: https://aras-database.github.io/database/index.html

License: http://creativecommons.org/licenses/by/4.0/

The gist: We report on a coordinated campaign by amateur astronomers using a combination of high and low resolution spectroscopy to observe the 2025 eclipse of the symbiotic binary V1413 Aql shortly after a

Terminology

Abstract

We report on a coordinated campaign by amateur astronomers using a combination of high and low resolution spectroscopy to observe the 2025 eclipse of the symbiotic binary V1413 Aql shortly after a probable Z And-type symbiotic outburst. We measured the eclipse time of minimum and computed an updated eclipse ephemeris. Our spectra were calibrated in absolute flux and multi-Gaussian fits were used to resolve and quantify components of the H alpha emission line. We measured the radial velocity curve of the white dwarf and determined the semi-amplitude as 25.7 km/s and the systemic radial velocity as 95.1 km/s. We found the spectral continuum was consistent with that of a late F or early G type giant star.

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