Image Details
Caption: Figure 9.
Top: continuum-subtracted, 2D spectra of He II λ4686 and Hβ. There is no evidence of an eclipse at inferior conjunction. The two panels use different intensity cuts. Bottom: Radial-velocity curve of the Ca II triplet, showing a semiamplitude of 220 km s−1 with a systemic velocity of 60 km s−1. The blue-to-red crossing establishes the epoch of inferior conjunction. The Ca II line fluxes near the time of inferior conjunction have been excluded because they are very low. This suggests that the secondary’s inner hemisphere is occluded by the rest of the star near inferior conjunction, consistent with a moderate-to-high orbital inclination.
© 2023. The Author(s). Published by the American Astronomical Society.