Volume 592, August 2016
|Number of page(s)||12|
|Section||Planets and planetary systems|
|Published online||08 August 2016|
Meteoroid stream of 12P/Pons-Brooks, December κ-Draconids, and Northern June Aquilids
Astronomical Institute, Slovak Academy of
Science, 05960 Tatranská
e-mail: email@example.com; firstname.lastname@example.org
Accepted: 10 May 2016
Context. It was found that some parent bodies of meteoroid streams can be related to more than one meteor shower observable in the atmosphere of Earth. The orbits of the members of such showers must evolve to the locations, which are far from the orbit of their parent, to cross the orbit of the Earth. An extensive simulation of the stream evolution is necessary to reveal such a complex of showers of the given parent body.
Aims. We continue the investigation of the evolution of the theoretical stream originating from the comet 12P/Pons-Brooks to understand its meteor-shower complex in more detail.
Methods. We model a theoretical comet stream assuming an ejection of 10 000 particles, representing the meteoroids, from its nucleus in several past perihelion passages. Adding to our previous work, here we also consider the Poynting-Robertson drag in our study of the particles’ dynamics. The orbits currently occurring in a vicinity of the Earth’s orbit are used to predict the showers associated with comet 12P.
Results. Two nighttime and two daytime showers are predicted to originate from 12P. The showers must consist of only relatively large particles, which are influenced to only a small extent by the Poynting-Robertson drag, because in this case, it deflects the particles from the collisional course with the Earth when efficient. The shower predicted to have the most particles is the nighttime shower, which can clearly be identified to the December κ-Draconids, No. 336 in the IAU MDC list. Another predicted nighttime shower has no counterpart in the considered observational data. Some characteristics of this shower are vaguely similar to those of Northern June Aquilids, No. 164. The observed counterparts of two predicted daytime showers were not found in the observational data we used or in the IAU MDC list.
Key words: comets: individual: 12P/Pons-Brooks / meteorites, meteors, meteoroids
© ESO, 2016
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