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Mazzotta Epifani, E.; Snodgrass, C.; Perna, D.; Dall'Ora, M.; Palumbo, P.; Della Corte, V.; Alvarez-Candal, A.; Melita, M.; Rotundi, A. "Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU" (2016) Planetary and Space Science. 132:23-31
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Abstract:

The aim of this paper is to contribute to the characterization of the general properties of the Long Period Comets (LPCs) family, and in particular to report on the dust environment of comet C/2009 P1 (Garradd). The comet was observed at two epochs pre-perihelion, at ~6 AU and at ~2.5 AU: broad-band images have been used to investigate its coma morphology and properties and to model the dust production rate. Comet C/2009 P1 (Garradd) is one of the most active and “dust producing” LPCs ever observed, even at the large heliocentric distance rh~6 AU. Its coma presents a complex morphology, with subtle structures underlying the classical fan-shaped tail, and, at rh~2.5 AU, also jet-like structures and spiralling outflows. In the reference aperture of radius ρ=5°×104 km, the R-Afρ is 3693±156 cm and 6368±412 cm, in August 2010 (rh~6 AU) and July 2011 (rh~2.5 AU), respectively. The application of a first order photometric model, under realistic assumptions on grain geometric albedo, power-law dust size distribution, phase darkening function and grain dust outflow velocity, yielded a measure of the dust production rate for the two epochs of observation of Qd=7.27×102 kg/s and Qd=1.37×103 kg/s, respectively, for a reference outflow dust velocity of vsmall=25 m/s for small (0.1–10 µm) grains and vlarge=1 m/s for large (10 µm–1 cm) grains. These results suggest that comet Garradd is one of the most active minor bodies observed in recent years, highly contributing to the continuous replenishment of the Interplanetary Dust Complex also in the outer Solar System, and pose important constraints on the mechanism(s) driving the cometary activity at large heliocentric distances. © 2016

Registro:

Documento: Artículo
Título:Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU
Autor:Mazzotta Epifani, E.; Snodgrass, C.; Perna, D.; Dall'Ora, M.; Palumbo, P.; Della Corte, V.; Alvarez-Candal, A.; Melita, M.; Rotundi, A.
Filiación:INAF Osservatorio Astronomico di Roma, Via Frascati 33, Monte Porzio Catone, 00078, Italy
Deptarment of Physical Sciences The Open University, Walton Hall, Milton Keynes, Buckinghamshire, United Kingdom
LESIA Observatoire de Paris PSL Reserach University CNRS Sorbonne Universités, UPMC University Paris Diderot, Sorbonne Paris Cité, 5 place Jules Jansson, Meudon, 92195, France
INAF Osservatorio Astronomico di Capodimonte, Via Moiariello 16, Napoli, 80131, Italy
Università Parthenope, Centro Direzionale Isola C4, Napoli, 80143, Italy
INAF Istituto di Astrofisica e Planetologia Spaziale, Via del Fosso del Cavaliere 100, Roma, 00133, Italy
Observatório Nacional, Rua General José Cristino 77, Rio de Janeiro, 20921-400, Brazil
IAFE – Universidad de Buenos Aires, Ciudad Universitaria, Intendente Guiraldes s/n, Buenos Aires, Argentina
Palabras clave:Coma; Comets; Comets; Dust; Fighter aircraft; Photometry; Solar system; Coma; Comets; Complex morphology; Continuous replenishment; Dust size distribution; Heliocentric distances; Interplanetary dust; Outer solar system; Dust
Año:2016
Volumen:132
Página de inicio:23
Página de fin:31
DOI: http://dx.doi.org/10.1016/j.pss.2016.07.007
Título revista:Planetary and Space Science
Título revista abreviado:Planet. Space Sci.
ISSN:00320633
CODEN:PLSSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00320633_v132_n_p23_MazzottaEpifani

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Citas:

---------- APA ----------
Mazzotta Epifani, E., Snodgrass, C., Perna, D., Dall'Ora, M., Palumbo, P., Della Corte, V., Alvarez-Candal, A.,..., Rotundi, A. (2016) . Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU. Planetary and Space Science, 132, 23-31.
http://dx.doi.org/10.1016/j.pss.2016.07.007
---------- CHICAGO ----------
Mazzotta Epifani, E., Snodgrass, C., Perna, D., Dall'Ora, M., Palumbo, P., Della Corte, V., et al. "Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU" . Planetary and Space Science 132 (2016) : 23-31.
http://dx.doi.org/10.1016/j.pss.2016.07.007
---------- MLA ----------
Mazzotta Epifani, E., Snodgrass, C., Perna, D., Dall'Ora, M., Palumbo, P., Della Corte, V., et al. "Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU" . Planetary and Space Science, vol. 132, 2016, pp. 23-31.
http://dx.doi.org/10.1016/j.pss.2016.07.007
---------- VANCOUVER ----------
Mazzotta Epifani, E., Snodgrass, C., Perna, D., Dall'Ora, M., Palumbo, P., Della Corte, V., et al. Photometry of the Oort Cloud comet C/2009 P1 (Garradd): Pre-perihelion observations at 5.7 and 2.5 AU. Planet. Space Sci. 2016;132:23-31.
http://dx.doi.org/10.1016/j.pss.2016.07.007