Spectroscopic follow-up confirms about 60% of Gaia DR3 astrometric compact-object candidates, identifies 27 neutron-star candidates, and measures the DR3 parallax zeropoint for orbital solutions as -0.0362 +/- 0.0053 mas.
A Simple Code for Rotational Broadening of Broad Wavelength Range High-Dispersion Spectra
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abstract
In high dispersion spectra of rotating bodies such as stars and planets, the rotation contributes significantly to, and sometimes dominates, the line broadening. We present a simple method for rotationally broadening large wavelength ranges of high-dispersion spectra. The broadening is rapid and scales linearly with the length of the spectrum array. For large wavelength ranges, the method is much faster than the popular convolution-based broadening. We provide the code implementation of this method in a publicly accessible repository.
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Spectroscopic follow-up of compact object binary candidates from Gaia DR3: White dwarfs, neutron stars, black holes, and the parallax zeropoint
Spectroscopic follow-up confirms about 60% of Gaia DR3 astrometric compact-object candidates, identifies 27 neutron-star candidates, and measures the DR3 parallax zeropoint for orbital solutions as -0.0362 +/- 0.0053 mas.