Dust Emission for Comets Shoemaker–Levy 1991a1 and McNaught–Russell 1993v

Waniak, W.; Zoła, S.; Krzesiński, J.

doi:10.1006/icar.1998.6019

Cited by 4 publications

(7 citation statements)

References 46 publications

(7 reference statements)

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“…This, and the similarity of morphology in both bands, are both indicative of dust-dominated activity in our data. Monte Carlo modelling of the object's dust environment with our established code 21 has revealed a power-law particle size-distribution exponent of -3.7 ± 1.8 and a 44 ± 14 m s −1 ejection speed applicable to β = 1 particles (where β is the ratio of the solar gravitational attraction to the solar radiation pressure; see Methods). The dynamical properties and morphology of 2I/Borisov make it clear that the body is the first certain case of an interstellar comet, and the second known interstellar minor body identified in the Solar System (after 'Oumuamua 3,4 ).…”

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confidence: 99%

Initial characterization of interstellar comet 2I/Borisov

et al. 2019

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Interstellar comets penetrating through the Solar System had been anticipated for decades 1,2 . The discovery of asteroidal-looking 'Oumuamua 3,4 was thus a huge surprise and a puzzle. Furthermore, the physical properties of the 'first scout' turned out to be impossible to reconcile with Solar System objects 4-6 , challenging our view of interstellar minor bodies 7,8 . Here, we report the identification and early characterization of a new interstellar object, which has an evidently cometary appearance. The body was discovered by Gennady Borisov on 30 August 2019 UT and subsequently identified as hyperbolic by our data mining code in publicly available astrometric data. The initial orbital solution implies a very high hyperbolic excess speed of ~32 km s −1 , consistent with 'Oumuamua 9 and theoretical predictions 2,7 . Images taken on 10 and 13 September 2019 UT with the William Herschel Telescope and Gemini North Telescope show an extended coma and a faint, broad tail. We measure a slightly reddish colour with a g′-r′ colour index of 0.66 ± 0.01 mag, compatible with Solar System comets. The observed morphology is also unremarkable and best explained by dust with a power-law sizedistribution index of -3.7 ± 1.8 and a low ejection speed (44 ± 14 m s −1 for β = 1 particles, where β is the ratio of the solar gravitational attraction to the solar radiation pressure).The nucleus is probably ~1 km in radius, again a common value among Solar System comets, and has a negligible chance of experiencing rotational disruption. Based on these early characteristics, and putting its hyperbolic orbit aside, 2I/Borisov appears indistinguishable from the native Solar System comets.

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confidence: 99%

Initial characterization of interstellar comet 2I/Borisov

et al. 2019

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“…The power index n should not exceed 3.3. The results of the actual model are fully consistent with the parameter values (0.1 km s −1 for dust ejection velocity and a power index n equal to 2.9) obtained from CCD photometry of the same comet (Waniak et al, 1998). For P/deVico we computed an ejection velocity of 0.13 ± 0.02 km s −1 and a power index n equal to 2.1 ± 0.6.…”

Section: Dust Coma Modelingmentioning

confidence: 53%

“…Taking into account a number of previous results (Fulle, 1987;Fulle and Sedmak, 1988;Cremonese and Fulle, 1989;Waniak, 1992;Waniak et al, 1998) we put index k equal to 0.2. The results of modeling are only slightly dependent on this parameter so it would be difficult to determine its precise value.…”

Section: Dust Coma Modelingmentioning

confidence: 99%

“…This is the result of the acceleration exerted on dust grains by solar radiation pressure. We tried to obtain certain parameters describing the cometary dust using the Monte Carlo model by Waniak et al (1998). We parametrized the dynamic properties of dust particles according to parameter β, which is the ratio of the solar radiation pressure to the solar gravitational force:…”

Section: Dust Coma Modelingmentioning

confidence: 99%

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CN, C2 radicals and dust in Comets Shoemaker–Levy 1991 T2 and P/deVico 1995 S1

Waniak

Winiarski

Magdziarz

et al. 2007

Icarus

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“…Press et al, 1992, , p. 402). In their dynamical model determining the three-dimensional outflow from the nucleus Waniak et al (1998) use the Richardson-Lucy (Richardson, 1972;Lucy, 1974) algorithm that helped to sharpen the early Hubble Space Telescope images. This algorithm is designed to ensure that the coefficients F q,i will be positive.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%