Modeling the 2022 τ-Herculid Outburst
نویسندگان
چکیده
Abstract The τ -Herculids (IAU shower number 61 TAH) is a minor meteor associated with comet 73P/Schwassmann–Wachmann 3, Jupiter-family that disintegrated into several fragments in 1995. As consequence of the nucleus breakup, possible increased rates were predicted for 2022. On May 30–31, observation networks around world reported two distinct peaks TAH activity, solar longitudes 69.°02 and 69.°42. This work examines encounter conditions Earth meteoroids ejected from 73P during splitting event on previous perihelion passages. Numerical simulations suggest main peak observed 2022 was caused by four times typical cometary gas expansion speed. High-resolution measurements performed Canadian Automated Meteor Observatory indicate these are fragile, estimated bulk densities 250 kg m −3 . In contrast peak, first activity best modeled trails prior to 1960. We find ordinary could have produced other apparitions past, including 1930 2017. extension our model future years predicts significant returns 2033 2049.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2023
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/acb93a