{'fraction_non_alphanumeric': 0.015306122448979591, 'fraction_numerical': 0.0, 'mean_word_length': 4.453703703703703, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The Collapse of Solid White Dwarfs

We present a model to explain the origin of galactic bulge X-ray sources. We study the evolution of initially cold and massive carbon-oxygen white dwarfs in a close binary system. Under this assumption the core of the white dwarf is solid when the star is reactivated by mass transfer. This implies a low velocity burning front as compared with the fluid case and perhaps a chemical differentiation of the star. Both effects allow the electron captures to overcome the thermonuclear burning. So, the collapse to a neutron star is a very likely outcome.