Optical Analysis and Modeling of HD96670, a new Black Hole X-ray Binary Candidate

Understand

We report on optical observations and modeling of HD96670, a single-line spectroscopic binary in the Carina OB2 association.

• We collected 10 epochs of optical spectroscopy, and optical photometry on 17 non-consecutive nights on the source.
• We construct a radial velocity curve from the spectra, and update the orbital period of the binary to be $P = 5.28388 \pm 0.00046$ days.
• The spectra show oxygen and helium absorption, consistent with an O-type primary.