Francesca Migliorini

Learn More
The kinematical properties of the fragment ejection processes in the events that produced the presently known asteroid families have long been poorly known due to the presence of a couple of unknown angles (the true anomaly and the argument of the perihelion of the parent body at the epoch of the family formation) in Gauss' equations. In the present paper a(More)
Asteroid (1726) Hoomeister is the lowest{ numbered and probably the largest member of a small, very compact dynamical family. Up to now, the only physical information available on this family consisted of the comparatively low IRAS albedos of Hoomeister and two other family members. After discussing the properties of the family, we report on our own(More)
A statistical method for the evaluation of the probable amount of interlopers included in the most recently identi ed asteroid families is developed. The method is based on the analysis of the local properties of the asteroidal distribution in the zones of the proper element space in which families are located. An application to the most important families(More)
In this paper we report rst optical re ectance spectra in the wavelength range 3800{9000 A for seven members of the Veritas asteroid family, as determined by Zappal a et al. (1994, Astron. J., 116, 291{ 314). The observed asteroids are 490Veritas, 844 Leontina, 1086Nata, 2428 Kamenyar, 2934 Aristophanes, 5592 Oshima, and 1985 TQ1. In addition, we observed(More)
We report a new method for automated identification and measurement of primary particles within soot aggregates as well as the sizes of the aggregates and discuss its application to high-resolution transmission electron microscope (TEM) images of the aggregates. The image processing algorithm is based on an optimized Hough transform, applied to the external(More)
An extensive analysis of the Maria family is presented. A reconstruction of the original ejection velocity eld of the fragments suggests that a substantial amount of relatively large fragments has been probably injected into the neighbouring 3/1 mean motion resonance with Jupiter. This is also con rmed by an analysis of the size distribution of the family,(More)
A numerical iterative procedure is presented for the evaluation of the effect of signal absorption in two-color laser-induced incandescence measurements. The correction process is applied to our experimental data in an axisymmetric flame [Appl. Opt. 44, 7414 (2005)]. The influence of signal trapping on peak soot temperature and on soot volume fraction has(More)
In this work, laser-induced breakdown spectroscopy (LIBS) is applied for quantitative measurements of Pb in aerosols. In order to investigate the carrier gas role and, in particular, the effect of O2 addition to the gas itself, measurements are carried out in nitrogen and air atmosphere. Aerosol particles are produced by nebulizing Pb(CH3COO)2 * 3H2O(More)
Rotationally resolved visible spectroscopy (6000 9500 A) of (7) Iris is presented. Within a few percents, no variation in Iris' visible spectrum over a ro-tational period has been found. These data suggest that the mineralogic properties of Iris' surface are globally homogeneous , although we cannot exclude the presence of some texture and/or albedo(More)
In this work we present a numerical iterative procedure for the evaluation of the effect of signal absorption in two-color laser-induced incandescence (2C-LII) measurements. The correction process is applied to experimental results, previously published by our group, in an axisymmetric diffusion flame. We have studied the influence of signal trapping on(More)