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8 votes

About angular diameter, parallax and image of the nearest neutron star RX J185635-3754

With very few exceptions of the biggest and most nearby sources (like Betelgeuze with <~50mas) we cannot resolve the angular diameter of stellar-type sources by direct imaging means. Precision of ...
planetmaker's user avatar
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7 votes

About angular diameter, parallax and image of the nearest neutron star RX J185635-3754

All images of stars (bar one or two of the closest or largest) are effectively those of point sources. The image we see is the convolution of a point with the instumental "point spread function&...
ProfRob's user avatar
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4 votes

About angular diameter, parallax and image of the nearest neutron star RX J185635-3754

The angular diameter doesn't come from imaging, but from photometry and spectroscopy. The observers estimated the surface brightness from the spectrum, and then computed how big the angular diameter ...
John Doty's user avatar
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