{'fraction_non_alphanumeric': 0.027196652719665274, 'fraction_numerical': 0.01882845188284519, 'mean_word_length': 5.095541401273885, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 1, '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}}
Mean Resultant Length as a Measure of the Lopsidedness of Satellite Galaxy Distributions

We summarize new results for the locations of the satellites of isolated host galaxies that were presented at the 237th meeting of the American Astronomical Society. Using 3575 host-satellite systems, we investigated the spatial distributions of the satellites with respect to their hosts using a Mean Resultant Length (MRL) statistic. In agreement with a previous analysis that relied on a less optimal statistic, we find that the satellites of isolated blue hosts have a strong tendency (>99.9999% confidence level) to be clustered toward one direction relative to their host. This also holds true for the full sample, but is driven by the “lopsidedness” of the satellite distributions around blue hosts. For red hosts (which comprise 76% of the sample), the MRL indicates only a marginal degree of lopsidedness (98.5% confidence level) in the satellite locations.