The SONG network archive holds >580,000 spectra of 3091 stars (2014–2025) and is presented as an open community resource for asteroseismology, binaries, variability, and exoplanets.
Binary interaction along the Red Giant Branch: The Barium Star perspective
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Pith paper citing it
abstract
Barium (Ba) stars form via mass-transfer in binary systems, and can subsequently interact with their white dwarf companion in a second stage of binary interaction. We used observations of main-sequence Ba systems as input for our evolutionary models, and try to reproduce the orbits of the Ba giants. We show that to explain short and sometimes eccentric orbits, additional interaction mechanisms are needed along the RGB.
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The Stellar Observations Network Group (SONG) -- A Legacy Archive of Stellar Time-Domain Spectroscopy
The SONG network archive holds >580,000 spectra of 3091 stars (2014–2025) and is presented as an open community resource for asteroseismology, binaries, variability, and exoplanets.