The Dust Environment of Main-Belt Comet P/2010 R2 (La Sagra)

Moreno, F.; Lara, L. M.; Licandro, J.; Ortiz, J. L.; de León, J.; Alí-Lagoa, V.; Agís-González, B.; Molina, A.
Bibliographical reference

The Astrophysical Journal Letters, Volume 738, Issue 1, article id. L16 (2011).

Advertised on:
9
2011
Description
We present a model of the dust environment of Main-Belt Comet P/2010 R2 (La Sagra) from images acquired during the period 2010 October-2011 January. The tails are best simulated by anisotropic ejection models, with emission concentrated near the nucleus south pole, the spin axis having an obliquity near 90°, indicative of a possible seasonally driven behavior. The dust mass loss rate increases rapidly shortly before perihelion, reaching a maximum value of ~4 kg s-1, and maintaining a sustained, cometary-like, activity of about 3-4 kg s-1 up to at least 200 days after perihelion, the date of the latest observation. The size distribution function is characterized by particles in the 5 × 10-4 cm to 1 cm radius range, assuming a time-constant power-law distribution with an index of -3.5. The ejection velocities are compatible with water-ice sublimation activity at the heliocentric distance of 2.7 AU, with values of 10-20 cm s-1 for particle radius of 1 cm, and inverse square root dependence on particle size, typical of hydrodynamical gas drag.
Related projects
Project Image
Minor Bodies of the Solar System

This project studies the physical and compositional properties of the so-called minor bodies of the Solar System, that includes asteroids, icy objects, and comets. Of special interest are the trans-neptunian objects (TNOs), including those considered the most distant objects detected so far (Extreme-TNOs or ETNOs); the comets and the comet-asteroid

Julia de
León Cruz