2015
DOI: 10.1093/mnras/stv1122
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A model of cometary outbursts: a new simple approach to the classical question

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Cited by 40 publications
(14 citation statements)
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“…This theory argues that cometary nuclei are probably formed by the aggregation of cometesimals of different sizes, which results in the creation of voids in the form of caves among the cometesimals. This hypothesis was recently discussed in Gronkowski & Weslowski (2015) and Ipatov (2012). In this scenario the outburst (dusty jet) is caused by the abrupt opening of a large subsurface cavity containing gas under high pressure.…”
Section: Subsurface Geysermentioning
confidence: 94%
“…This theory argues that cometary nuclei are probably formed by the aggregation of cometesimals of different sizes, which results in the creation of voids in the form of caves among the cometesimals. This hypothesis was recently discussed in Gronkowski & Weslowski (2015) and Ipatov (2012). In this scenario the outburst (dusty jet) is caused by the abrupt opening of a large subsurface cavity containing gas under high pressure.…”
Section: Subsurface Geysermentioning
confidence: 94%
“…In general, during an outburst, the comet brightness increases by a factor of ∼2-5 within a few hours. This corresponds to an average mass release of ∼100 kg with speed in the range of ∼0.1-1.0 km s −1 and an average kinetic energy release of ∼10 12±4 J (Whitney 1955;Hughes 1990;Beech & Gauer 2002;Gronkowski & Wesolowski 2015). The largest outburst was detected at comet 17P/Holmes on 24 October 2007, which had a brightness increase of ∼15 mag (Moreno et al 2008;Sekanina 2008a).…”
Section: Introductionmentioning
confidence: 89%
“…As was mentioned in the previous paragraph, the jump in brightness of a comet is produced by ejection of some layers of its nucleus into outer space and due to the sublimation of subsurface layers exposed in this way to the solar radiation. The calculations are based on the Pogson law and were carried out in a similar way as in Gronkowski (, , ) and Gronkowski & Wesołowski (). The numerical technicalities related to the estimation of jump Δ m can be found in these works and the references therein; here we only outline briefly the main formulae that are used.…”
Section: Calculations Of Cometary Outburst Brightness Amplitudementioning
confidence: 99%
“…We assume that the radius of cometary grains, a , obeys the conditions a min ≤ a ≤ a max . The mass of cometary grains, M inc ( t i ), can be also expressed as (Gronkowski , ; Gronkowski & Wesołowski ) Minc()ti=4πRn2η()tiχ()JH2normalO()tiRcomavnormalH2O. …”
Section: Calculations Of Cometary Outburst Brightness Amplitudementioning
confidence: 99%
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