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Here is a picture from the most recent review I could find - Horvath et al. (2020). The companion of J0453+1559 is still the least massive of the double neutron stars with very precisely measured masses. I cannot find any citations to the Martinez et al. paper (here is a list) that either update the mass or shed any further light on its true identity. It ...


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You will have two half-shadows, and maybe an overlapping part where no direct light reaches the ground. Thus there will be a shadow where light of neither reaches the space. There will be a partial shadow where only light from one star reaches the space. And then there is of course the space which is illuminated by both. You totally right: one can try out ...


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