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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Dust from comet 209P/LINEAR during its 2014 return: Parent body of a new meteor shower, the may camelopardalids
Astrophysical Journal Letters, Volume 798, No. 2, Article L34, Year 2015
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Description
We report a new observation of the Jupiter family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance rh = 1.6 AU and showed weak activity at rh ≤ 1.4 AU. We found an active region of <0.001% of the entire nuclear surface during the comet's dormant phase. An edge-on image suggests that particles up to 1 cm in size (with an uncertainty of factor 3-5) were ejected following a differential power-law size distribution with index q = -3.25 ± 0.10. We derived a mass-loss rate of 2-10 kg s-1 during the active phase and a total mass of ≈5 × 107 kg during the 2014 return. The ejection terminal velocity of millimeter- to centimeter-sized particles was 1-4 m s-1, which is comparable to the escape velocity from the nucleus (1.4 m s-1). These results imply that such large meteoric particles marginally escaped from the highly dormant comet nucleus via the gas drag force only within a few months of the perihelion passage. © 2015. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Kuroda, Daisuke
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Hanayama, Hidekazu
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Takahashi, Jun
Japan, Kobe
University of Hyogo
Sarugaku, Yuki
Japan, Chofu
Japan Aerospace Exploration Agency
Watanabe, Makoto
Japan, Sapporo
Hokkaido University
Imai, Masataka
Japan, Sapporo
Hokkaido University
Goda, Shuhei
Japan, Sapporo
Hokkaido University
Akitaya, Hiroshi
Japan, Higashihiroshima
Hiroshima University
Takagi, Yuhei
Japan, Kobe
University of Hyogo
Morihana, Kumiko
Japan, Kobe
University of Hyogo
Honda, Satoshi
Japan, Kobe
University of Hyogo
Arai, Akira
Japan, Kobe
University of Hyogo
Sekiguchi, Kazuhiro
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Oasa, Yumiko
Japan, Saitama
Saitama University
Saito, Yoshihiko
Japan, Tokyo
Tokyo Institute of Technology
Morokuma, Tomoki
Japan, Tokyo
The University of Tokyo
Murata, Katsuhiro L.
Japan, Nagoya
Nagoya University
Nogami, Daisaku
Japan, Kyoto
Kyoto University
Nagayama, Takahiro
Japan, Kagoshima
Kagoshima University
Yanagisawa, Kenshi
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Yoshida, Michitoshi
Japan, Higashihiroshima
Hiroshima University
Ohta, Kouji
Japan, Kyoto
Kyoto University
Kawai, Nobuyuki
Japan, Tokyo
Tokyo Institute of Technology
Miyaji, Takeshimiyaji
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Fukushima, Hideo
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Watanabe, Juni'chi Ichi
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Opitom, Cyrielle
Belgium, Liege
Université de Liège
Jehin, Emmanuël
Belgium, Liege
Université de Liège
Gillon, Michaël
Belgium, Liege
Université de Liège
Vaubaillon, Jerermie J.
France, Paris
L'observatoire de Paris
Statistics
Citations: 17
Authors: 30
Affiliations: 14
Identifiers
Doi:
10.1088/2041-8205/798/2/L34
ISSN:
20418205
Research Areas
Cancer