System Parameters for the Eclipsing B-star Binary BD+11°3569
Abstract
We present the results from a combined spectroscopic and photometric in-depth study of the binary system BD+11o3569 (B4 V + B5 V). Fits to Johnson V, Cousins R C and I C photometry, and radial velocities yield an orbital period of 1.49712598 ± 0.00000020 days and an inclination of 82.°93 ± 0.°17. The combined light curves and radial velocity solution give masses and radii of M 1 = 5.259 ± 0.064 M ⊙ with M 2 = 4.325 ± 0.040 M ⊙ and R 1 = 3.509 ± 0.018 R ⊙ with R 2 = 2.570 ± 0.023 R ⊙. We find that the system does not match a single age isochrone when derived astrophysical quantities for the components are compared with theoretical stellar models, but are bounded by 32 and 40 Myr isochrones. We estimate a distance to the system of 1130 ± 150 pc, which agrees reasonably with the published Gaia distance.
- Publication:
-
The Astronomical Journal
- Pub Date:
- September 2019
- DOI:
- 10.3847/1538-3881/ab304b
- Bibcode:
- 2019AJ....158..118W
- Keywords:
-
- binaries: eclipsing;
- binaries: spectroscopic;
- stars: early-type;
- stars: fundamental parameters;
- stars: individual: BD+11 3569