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Abstract:

All the Trojan asteroids orbit about the Sun at roughly the same heliocentric distance as Jupiter. Differences in the observed visible reflection spectra range from neutral to red, with no ultra-red objects found so far. Given that the Trojan asteroids are collisionally evolved, a certain degree of variability is expected. Additionally, cosmic radiation and sublimation are important factors in modifying icy surfaces even at those large heliocentric distances. We search for correlations between physical and dynamical properties, we explore relationships between the following four quantities; the normalised visible reflectivity indexes (S′), the absolute magnitudes, the observed albedos and the orbital stability of the Trojans. We present here visible spectroscopic spectra of 25 Trojans. This new data increase by a factor of about 5 the size of the sample of visible spectra of Jupiter Trojans on unstable orbits. The observations were carried out at the ESO-NTT telescope (3.5 m) at La Silla, Chile, the ING-WHT (4.2 m) and NOT (2.5 m) at Roque de los Muchachos observatory, La Palma, Spain. We have found a correlation between the size distribution and the orbital stability. The absolute-magnitude distribution of the Trojans in stable orbits is found to be bimodal, while the one of the unstable orbits is unimodal, with a slope similar to that of the small stable Trojans. This supports the hypothesis that the unstable objects are mainly byproducts of physical collisions. The values of S′ of both the stable and the unstable Trojans are uniformly distributed over a wide range, from 0%/1000 Å to about 15%/1000 Å. The values for the stable Trojans tend to be slightly redder than the unstable ones, but no significant statistical difference is found. © 2008 Elsevier Inc. All rights reserved.

Registro:

Documento: Artículo
Título:Physical properties and orbital stability of the Trojan asteroids
Autor:Melita, M.D.; Licandro, J.; Jones, D.C.; Williams, I.P.
Filiación:IAFE (UBA, CONICET), Argentina
Isaac Newton Group of Telescopes, La Palma, Spain
Instituto de Astrofísica de Canarias, Tenerife, Spain
Astronomy Unit, Queen Mary College, University of London, United Kingdom
Palabras clave:Asteroids; Comets; composition; dynamics
Año:2008
Volumen:195
Número:2
Página de inicio:686
Página de fin:697
DOI: http://dx.doi.org/10.1016/j.icarus.2008.01.004
Título revista:Icarus
Título revista abreviado:Icarus
ISSN:00191035
CODEN:ICRSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191035_v195_n2_p686_Melita

Referencias:

  • Brunetto, R., Barucci, M.A., Dotto, E., Strazzulla, G., Ion irradiation of frozen methanol, methane, and benzene: Linking to the colors of Centaurs and trans-neptunian objects (2006) Astrophys. J., 644 (1), pp. 646-650
  • Brunetto, R., Romano, F., Blanco, A., Fonti, S., Martino, M., Orofino, V., Verrienti, C., Space weathering of silicates simulated by nanosecond pulse UV excimer laser (2006) Icarus, 180 (2), pp. 546-554
  • Bus, S.J., 1999. Compositional structure in the asteroid belt: Results of a spectroscopic survey, Ph.D. thesis, MIT, Cambridge; Bendjoya, P., Cellino, A., Di Martino, M., Saba, L., Spectroscopic observations of Jupiter Trojans (2004) Icarus, 168 (2), pp. 374-384
  • Chambers, J.E., A hybrid symplectic integrator that permits close encounters between massive bodies (2004) Mon. Not. R. Astron. Soc., 304, pp. 793-799
  • Cruikshank, D.P., Dalle Ore, C.M., Roush, T.L., Geballe, T.R., Owen, T.C., de Bergh, C., Cash, M.D., Hartmann, W.K., Constraints on the composition of Trojan Asteroid 624 Hektor (2001) Icarus, 153 (2), pp. 348-360
  • Dell'Oro, A., Marzari, P., Paolicchi, F., Dotto, E., Vanzani, V., Trojan collision probability: A statistical approach (1998) Astron. Astrophys., 339, pp. 272-277
  • Dotto, E., Fornasier, S., Barucci, M.A., Licandro, J., Boehnhardt, H., Hainaut, O., Marzari, F., De Luise, F., The surface composition of Jupiter Trojans: Visible and infrared survey of dynamical families (2006) Icarus, 183 (2), pp. 420-434
  • Dvorak, R., Tsiganis, K., Why do Trojan ASCS (not) escape? (2000) Celest. Mech. Dynam. Astron., 78, pp. 125-136
  • Emery, J.P., Brown, R.H., Constraints on the surface composition of Trojan asteroids from near-infrared (0.8-4.0 μm) spectroscopy (2003) Icarus, 164 (1), pp. 104-121
  • Emery, J.P., Brown, R.H., The surface composition of Trojan asteroids: Constraints set by scattering theory (2004) Icarus, 170 (1), pp. 131-152
  • Emery, J.P., Cruikshank, D.P., Van Cleve, J., Thermal emission spectroscopy (5.2-38 μm) of three Trojan asteroids with the Spitzer Space Telescope: Detection of fine-grained silicates (2006) Icarus, 82 (2), pp. 496-512
  • Fernández, Y.R., Sheppard, S.S., Jewitt, D.C., The albedo distribution of jovian Trojan asteroids (2003) Astron. J., 126, pp. 1563-1574
  • Fornasier, S., Dotto, E., Marzari, F., Barucci, M.A., Boehnhardt, H., Hainaut, O., de Bergh, C., Visible spectroscopic and photometric survey of L5 Trojans: Investigation of dynamical families (2004) Icarus, 172, pp. 221-232
  • Fornasier, S., Dotto, E., Hainaut, O., Marzari, F., Boehnhardt, H., De Luise, F., Barucci, M.A., Visible spectroscopic and photometric survey of Jupiter Trojans: Final result on dynamical families (2007) Icarus, 190, pp. 622-642
  • Gil-Hutton, R., Color diversity among Kuiper belt objects: The collisional resurfacing model revisited (2002) Planet. Space Sci., 50 (1), pp. 57-62
  • Horner, J., Evans, N.W., Bailey, M.E., Simulation of the population of Centaurs. II. Individual objects (2005) Mon. Not. R. Astron. Soc., 355 (2), pp. 321-329
  • Jewitt, D.C., From Kuiper Belt object to cometary nucleus: The missing ultrared matter (2002) Astron. J., 123 (2), pp. 1039-1049
  • Jewitt, D.C., Luu, J.X., CCD spectra of asteroids. II. The Trojans as spectral analogs of cometary nuclei (1990) Astron. J., 100, pp. 933-944
  • Jewitt, D.C., Trujillo, C.A., Luu, J.X., Population and size distribution of small jovian trojan asteroids (2000) Astron. J., 120 (2), pp. 1140-1147
  • Karlsson, O., Transitional and temporary objects in the Jupiter Trojan area (2004) Astron. Astrophys., 413, pp. 1153-1161
  • Landolt, A.U., UBVRI photometric standard stars in the magnitude range 11.5-16.0 around the celestial equator (1992) Astron. J., 104 (1), pp. 340-371. , 436-491
  • Lazzaro, D., Angeli, C.A., Carvano, J.M., Mothe-Diniz, T., Duffard, R., Florczak, M., S3OS2: The visible spectroscopic survey of 820 asteroids (2004) Icarus, 172, pp. 179-220
  • Levison, H., Shoemaker, E.M., Shoemaker, C.S., The dispersal of the Trojan asteroid swarm (1997) Nature, 385, pp. 42-44
  • Marzari, F., Scholl, H., Capture of Trojans by a growing proto-Jupiter (1998) Icarus, 131 (1), pp. 41-51
  • Marzari, F., Farinella, P., Vanzani, V., Are Trojan collisional families a source for short-period comets? (1995) Astron. Astrophys., 299, p. 267
  • Milani, A., The Trojan asteroid belt: Proper elements, stability, chaos and families (1993) Celest. Mech. Dynam. Astron., 57 (1-2), pp. 59-94
  • Milani, A., Nobili, A.M., An example of stable chaos in the Solar System (1992) Nature, 357 (6379), pp. 569-571
  • Milani, A., Nobili, A.M., Knezevic, Z., Stable chaos in the asteroid belt (1997) Icarus, 125 (1), pp. 13-31
  • Morbidelli, A., Levison, H.F., Tsiganis, K., Gomes, R., Chaotic capture of Jupiter's Trojan asteroids in the early Solar System (2005) Nature, 435 (7041), pp. 462-465
  • Moroz, L., Baratta, G., Strazzulla, G., Starukhina, L., Dotto, E., Barucci, M.A., Arnold, G., Distefano, E., Optical alteration of complex organics induced by ion irradiation. 1. Laboratory experiments suggest unusual space weathering trend (2004) Icarus, 170 (1), pp. 214-228
  • Nesvorny, D., Dones, L., How long-lived are the hypothetical Trojan populations of Saturn, Uranus, and Neptune? (2002) Icarus, 160 (2), pp. 271-288
  • Pilat-Lohinger, E., Dvorak, R., Trojans in stable chaotic motion (1999) Celest. Mechan. Dynam. Astron., 73, pp. 117-126
  • Rabe, E., Orbital characteristics of comets passing through the 1:1 commensurability with Jupiter: The motion, evolution of orbits, and origin of comets (1972) Proceedings of IAU Symposium. No. 45, Leningrad, USSR, p. 55. , Chebotarev G.A., Kazimirchak-Polonskaia E.I., and Marsden B.G. (Eds). August 4-11, 1970, Reidel, Dordrecht
  • Strazzulla, G., Dotto, E., Binzel, R., Brunetto, R., Barucci, M.A., Blanco, A., Orofino, V., Spectral alteration of the Meteorite Epinal (H5) induced by heavy ion irradiation: A simulation of space weathering effects on near-Earth asteroids (2005) Icarus, 174 (1), pp. 31-35
  • Tedesco, E.F., Noah, P.V., Noah, M., Price and Stephan, D., The supplemental IRAS Minor Planet Survey (2002) Astron. J., 123 (2), pp. 1056-1085
  • Tsiganis, K., Dvorak, R., Pilat-Lohinger, E., Thersites: A jumping' Trojan? (2000) Astron. Astrophys., 354, pp. 1091-1100
  • Tsiganis, K., Varvoglis, H., Dvorak, R., Chaotic diffusion and effective stability of Jupiter Trojans (2005) Celest. Mech. Dynam. Astron., 92 (1-3), pp. 71-87
  • Yang, B., Jewitt, D., Spectroscopic search for water ice on jovian Trojan asteroids (2007) Astron. J., 134 (1), pp. 223-228
  • Yoder, C.F., Notes on the origin of the Trojan asteroids (1979) Icarus, 40, pp. 341-344

Citas:

---------- APA ----------
Melita, M.D., Licandro, J., Jones, D.C. & Williams, I.P. (2008) . Physical properties and orbital stability of the Trojan asteroids. Icarus, 195(2), 686-697.
http://dx.doi.org/10.1016/j.icarus.2008.01.004
---------- CHICAGO ----------
Melita, M.D., Licandro, J., Jones, D.C., Williams, I.P. "Physical properties and orbital stability of the Trojan asteroids" . Icarus 195, no. 2 (2008) : 686-697.
http://dx.doi.org/10.1016/j.icarus.2008.01.004
---------- MLA ----------
Melita, M.D., Licandro, J., Jones, D.C., Williams, I.P. "Physical properties and orbital stability of the Trojan asteroids" . Icarus, vol. 195, no. 2, 2008, pp. 686-697.
http://dx.doi.org/10.1016/j.icarus.2008.01.004
---------- VANCOUVER ----------
Melita, M.D., Licandro, J., Jones, D.C., Williams, I.P. Physical properties and orbital stability of the Trojan asteroids. Icarus. 2008;195(2):686-697.
http://dx.doi.org/10.1016/j.icarus.2008.01.004