Opposition Effects in Brightness, Color, and Polarization of Comet 1P/Halley: Comparison with Atmosphereless Solar System Bodies
Tóm tắt
Systematic and uniform sets of photometric and polarimetric observations of comet 1P/Halley have been analyzed. The phase dependence of brightness for comet Halley was obtained at phase angles α ranging from 1.4° ≤ α ≤ 65°. The following parameters were determined: the amplitude of the opposition effect Δm = 0.75m ± 0.06m; the half-width at a half-maximum of intensity HWHM = 6.4° ± 1.6°; the linear phase coefficient β = 0.0045 ± 0.0001 mag/deg for α from 30° ≤ α ≤ 65°; and the phase angle at which a nonlinear increase in brightness starts, α opp ≈ 31°. For the first time, the phase-angle dependence was obtained for the color of the dust of comet Halley: the color index BC-RC systematically decreases with increasing phase angle. Such a phase behavior of the dust color can be caused by the decrease in the mean size of dust particles that occurs when the comet approaches the Sun. For comet Halley, the negative polarization branch is almost symmetric; the minimal value of polarization is P
min = −1.54% at a phase angle αmin = 10.5°, and the inversion angle is αinv = 21.7°. A comparative analysis of the phase functions of brightness and polarization has been performed for the cometary dust and atmosphereless bodies. Among the latter are low-albedo asteroids of the P and C types (102 Miriam and 47 Aglaja, respectively), as well as Deimos; high-albedo objects, such as the E-type asteroid 64 Angelina and the icy satellite of Jupiter Europa; and the Moon with its intermediate albedo. The possibility of a weak depression in the negative polarization branch of comets Halley and 47P/Ashbrook-Jackson at phase angles smaller than 2° is discussed.
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A’Hearn, M.F., Millis, R.L., and Birch, P.V., Gas and Dust in Some Periodic Comets, Astron. J., 1979, vol. 84, no.4, pp. 570–579.
A’Hearn, M.F., Schleicher, D.G., Feldman, P.D., et al., Comet Bowell 1980b, Astron. J., 1984, vol. 89, no.4, pp. 579–591.
A’Hearn, M.F. and Vanysek, V., Photometry and Polarimetry Network, in Comet Halley Archive, Release 1.0, CD-ROM vol. USA_NASA_IHW_Hal_0019 through 0024 / Arch: Grayzeck, E., Klinglesmith, D., and Niedner, M., Greenbelt: Int. Hally Watch, GSFC, 1992.
Belskaya, I.N. and Shevchenko, V.G., Opposition Effect of Asteroids, Icarus, 2000, vol. 147, pp. 94–105.
Belskaya, I.N., Shevchenko, V.G., Efimov, Yu.S., et al., Opposition Polarimetry and Photometry of the Low Albedo Asteroid 419 Aurelia, in Asteroids, Comets, and Meteors 2002, Warmbein, B., Ed., ESA SP-500, Proceedings, 2002, pp. 489–491.
Belskaya, I.N., Shevchenko, V.G., Kiselev, N.N., et al., Opposition Polarimetry and Photometry of S-and E-Type Asteroids, Icarus, 2003, vol. 166, pp. 276–284.
Brownlee, D.E., Interplanetary Dust: Possible Implication for Comets and Presolar Interstellar Grains, in Protostars and Planets, Gehrels, T., Ed., University of Arizona Press, 1978, pp. 134–150. Translated under the title Protozvezdy i planety, Moscow: Mir, 1982.
Churyumov, K.I., Rosenbush, V.K., Rspaev, F.K., and Gorodetsky, D.I., Some Results of the Narrow-Band Photometry of Comet Halley (1986 III), Astrophys. J., 1990, vol. 356, pp. 687–692.
Churyumov, K.I. and Rosenbush, V.K., Peculiarities of Gas and Dust Production Rates in Comets P/Halley (1986 III), P/Giacobini-Zinner (1985 XIII), P/Hartley-Good (1985 XVII) and P/Thiele (1985 XIX), Astron. Nachr., 1991, vol. 312, no.6, pp. 385–391.
Delahodde, C.E., Meech, K.J., Hainaut, O.R., and Dotto, R., Detailed Phase Function of Comet 28P/Neujmin 1, Astron. Astrophys., 2001, vol. 376, pp. 672–685.
Devine, N., A Simple Radiation Model of Cometary Dust for P/Halley, ESA SP-174, 1981, pp. 47–53.
Dollfus, A., Polarimetry of Grains in the Coma of P/Halley. II. Interpretation, Astron. Astrophys., 1989, vol. 213, pp. 469–478.
Fernandez, Y.R., Lisse, C.M., Kaufl, H.U., et al., Physical Properties of Nucleus of Comet 2P/Encke, Icarus, 2000, vol. 147, pp. 145–160.
Green, D.W.E. and Morris, C.S., The Visual Brightness Behavior of P/Halley During 1981–1986, Astron. Astrophys., 1987, vol. 187, pp. 613–618.
Grynko, Ye., Jockers, K., and Schwenn, R., The Phase Curve of Cometary Dust: Observations of Comet 96P/Machholz 1 at Large Phase Angle with the SOHO LASCO C3 Coronagraph, Astron. Astrophys., 2004, vol. 427, pp. 755–761.
Hanner, M.S. and Newburn, R.L., Infrared Photometry of Comet Wilson (1986l) at Two Epochs, Astron. J., 1989, vol. 97, pp. 254–261.
Hartmann, W.K., Cruikshank, D.P., and Degewij, J., Remote Comets and Related Bodies—VJHK Colorimetry and Surface Materials, Icarus, 1982, vol. 52, pp. 377–408.
Hartmann, W.K. and Cruickshank, D., Comet Color Changes with Solar Distance, Icarus, 1984, vol. 57, pp. 55–62.
Jewitt, D.C. and Meech, K.J., Cometary Grain Scattering Versus Wavelength Or What Color Is Cometary Dust, Astrophys. J., 1986, vol. 310, pp. 937–952.
Jewitt, D., Sheppard, S., and Fernandez, Y., 143P/Kowal-Mrkos and the Shapes of Cometary Nuclei, Astron. J., 2003, vol. 125, pp. 3366–3377.
Jewitt, D. and Sheppard, S., The Nucleus of Comet 48P/Johnson, Astron. J., 2004, vol. 127, pp. 1784–1790.
Jockers, K., Observations of Scattered Light from Cometary Dust and Their Interpretation, Earth, Moon, Planets, 1997, vol. 79, nos.1–2, pp. 221–245.
Kerenen, S., Muinonen, K., and Piironen, J., Computations of Coherent Backscattering and Shadowing Effects for Atmosphereless Solar System Objects, in Light Scattering by Nonspherical Particles: Halifax Contributions, Videen, G., Fu, Q., and Chylek, P., Eds., Army Res. Lab., 2000, pp. 279–282.
Kiselev, N.N. and Chernova, G.P., Polarization of the Radiation of Comet West 1975n, Astron. Zh., 1978, vol. 55, no.5, pp. 1064–1071 [Sov. Astron. (Engl. Transl.), vol. 22, no. 5, p. 607].
Kiselev, N.N. and Chernova, G.P., Phase Function of Polarization and Brightness and the Nature of Cometary Atmosphere Particles, Icarus, 1981, vol. 48, pp. 473–481.
Kiselev, N.N., Shakhovskoy, N.M., and Efimov, Yu.S., On the Polarization Opposition Effect of E-Type Asteroid 64 Angelina, Icarus, 1996, vol. 120, pp. 408–411.
Kiselev, N.N., Rosenbush, V.K., and Jockers, K., Polarimetry of Asteroid 2100 Ra-Shalom: A Comparison of Polarization-Phase Dependences for C-and S-Type Asteroids and Comets, Astron. Vestn, 1999, vol. 33, no.3, pp. 222–230 [Sol. Syst. Res. (Engl. Transl.), vol. 33, no. 3, p. 192].
Kiselev, N.N., Light Scattering by Dust Particles of Comets, Asteroids and Circumstellar Shells: Observations and Interpretation, Doktoral Sci. (Phys.-Math.) Dissertation, Kharkiv, 2003.
Kiselev, N. and Rosenbush, V., Polarimetry of Comets: Progress and Problems, in Photopolarimetry in Remote Sensing, Videen, G., Yatskiv, Ya., and Mishchenko, M., Eds., Dordrecht: Kluwer, 2004, pp. 411–430.
Kolokolova, L.O., Jockers, K., Chernova, G.P., and Kiselev, N.N., Properties of Cometary Dust from Color and Polarization, Icarus, 1997, vol. 126, pp. 351–361.
Kolokolova, O.L., Lara, L.-M., Schulz, R., et al., Properties and Evolution of Dust in Comet Tabur (C/1996 Q1) from the Color Map, Icarus, 2001, vol. 153, pp. 197–207.
Kolokolova, L., Kimura, H., and Mann, I., Characterization of Dust Particles Using Photopolarimetric Data: Example of Cometary Dust, in Photopolarimetry in Remote Sensing, Videen, G.., Yatskiv, Ya., and Mishchenko, M., Eds., Dordrecht: Kluwer, 2004, pp. 431–454.
Kolokolova, L.O., Hanner, M.S., Levasseur-Regourd, A.-Ch., and Gustafson B.A.S. Physical Properties of Cometary Dust from Light Scattering and Emission, in Comets II, Festou, M., Keller, U., and Weaver, H., Eds., University of Arizona Press, 2005, pp. 577–604.
Lamy, P.L. and Perrin, J.-M., Volume Scattering Function and Space Distribution of the Interplanetary Dust Cloud, Astron. Astrophys., 1986, vol. 163, pp. 269–286.
Lumme, K. and Bowell, E., Photometric Properties of Zodical Light Particles, Icarus, 1985, vol. 62, pp. 54–71.
Lumme, K. and Muinonen, K., A Two-Parameter System for Linear Polarization of Some Solar System Objects, in Asteroids, Comets, Meteors, Harris, A.W. and Bowell, E., Eds., Houston: LPI 810, 1993, pp. 194–197.
Lumme, K., Scattering Properties of Interplanetary Dust Particles, in Light Scattering by Nonspherical Particles. Theory, Measurements, and Applications, Mishchenko, M.I., Hovenier, J.W., and Travis, L.D., Eds., Academic Press, 2000, pp. 555–583.
Meech, K.J. and Jewitt, D.C., Observations of Comet P/Halley at Minimum Phase Angle, Astron. Astrophys., 1987, vol. 187, pp. 585–593.
Millis, R.L., A’Hearn, M.F., and Thompson, D.T., Narrowband Photometry of Comet P/Stephan-Oterma and the Backscattering Properties of Cometary Grains, Astron. J., 1982, vol. 87, no.9, pp. 1310–1317.
Mishchenko, M.I., On the Nature of the Polarization Opposition Effect Exhibited by Saturn’s Rings, Astrophys. J., 1993, vol. 411, pp. 351–361.
Mishchenko, M., Tishkovets, V., and Litvinov, P., Exact Results of the Vector Theory of Coherent Backscattering from Discrete Random Media: An Overview, in Optics of Cosmic Dust, Videen, G. and Kocifaj, M., Eds., Dordrecht: Kluwer, 2002, pp. 239–260.
Muinonen, K., Piironen, J., Shkuratov, Yu.G., et al., Asteroid Photometric and Polarimetric Phase Effects, in Asteroids III, Bottke, W.F., Cellino, A., Paolicchi, P., and Binzel, R.P., Eds., Tucson: Univ. Arizona Press, 2002a, pp. 123–138.
Muinonen, K., Videen, G., Zubko, E., and Shkuratov, Yu., Numerical Techniques for Backscattering by Random Media, in Optics of Cosmic Dust, Videen, G. and Kocifaj, M., Eds., Dordrecht: Kluwer, 2002b, pp. 261–282.
Mukai, T., Iwata, T., Kikuchi, S., et al., Polarimetry of Asteroids, Planet. Space. Sci., 1994, vol. 42, no.4, pp. 323–326.
Newburn, R.L., Jr., and Spinrad, H., Spectrophotometry of Seventeen Comets. II. The Continuum, Astron. J., 1985, vol. 90, no.12, pp. 2591–2608.
Osip, D., Schleicher, D., and Campins, H., Near Opposition Phase Effect in Dust Coma of Comet Austin (1989c1) and Other Comets, 160th Simp. IAU: Asteroids, Comets, Meteors, Houston: LPI 810, 1993, p. 241.
Petrova, E.V., Tishkovets, V.P., and Jockers, K., Polarization of Light Scattered by Solar System Bodies and the Aggregate Model of Dust Particles, Astron. Vestn., 2004, vol. 38, no.4, pp. 354–371 [Sol. Syst. Res. (Engl. Transl.), vol. 38, no. 4, pp. 309–324].
Rosenbush, V.K., Rspaev, F.K., Churyumov, K.I., et al., Variations of the Rates of Gas and Dust Production in Comet Halley, Pis’ma Astron. Zh., 1989, vol. 15, no.4, pp. 358–367 [Sov. Astron. Lett. (Engl. Transl.), vol. 15, no. 2, p. 155].
Rosenbush, V.K., Rspaev, F.K., Churyumov, K.I., and Gorodetskii, D.I., Some Results of Narrowband Photometry of Halley’s Comet 1986III, Astron. Zh., 1990, vol. 67, no.3, pp. 642–652 [Sov. Astron. (Engl. Transl.), vol. 34, no. 3, p. 319].
Rosenbush, V.K., Kiselev, N.N., Avramchuk, V.V., and Mishchenko, M.I., Photometric and Polarimetric Phenomena Exhibited by Solar System Bodies, in Optics of Cosmic Dust, Videen, G. and Kocifaj, M., Eds., Dordrecht: Kluwer, 2002, pp. 191–226.
Rosenbush, V.K., Kiselev, N.N., Shevchenko V.G., et al., Polarization and Brightness Opposition Effects for the E-type Asteroid 64 Angelina, Icarus, 2005 (in press).
Schleicher, D.G., Millis, R.L., and Birch, P.V., Narrowband Photometry of Comet P/Halley: Variation with Heliocentric Distance, Season, and Solar Phase Angle, Icarus, 1998, vol. 132, pp. 397–417.
Sekanina, Z., Comet Bowell (1980b): An Active-Looking Dormant Object?, Astron. J., 1982, vol. 87, pp. 161–169.
Shevchenko, V.G. and Lupishko, D.F., Optical Properties of Asteroids from Photometric Data, Astron. Vestn, 1998, vol. 32, no.3, pp. 250–263 [Sol. Syst. Res. (Engl. Transl.), vol. 32, no. 3, p. 220].
Shkuratov, Yu.G., Muinonen, K., Bowell, E., et al., A Critical Review of Theoretical Models of Negatively Polarized Light Scattered by Atmosphereless Solar System Bodies, Earth, Moon, Planets, 1994, vol. 65, pp. 201–246.
Shkuratov, Yu.G., A Mechanism of the Opposition Brightness Effect of Comets and Zodiacal-Light Dust, Astron. Vestn, 1997, vol. 31, no.3, pp. 268–270 [Sol. Syst. Res. (Engl. Transl.), vol. 31, no. 3, p. 239].
Shkuratov, Y., Videen, G., Kreslavsky, M., et al., Scattering Properties of Planetary Regoliths near Opposition, in Photopolarimetry in remote sensing, Videen, G., Ed., Dordrecht: Kluwer, 2004, pp. 191–208.
Soderblom, L.A., Becker, T.L., Bennett, G., et al., Comet 19P/Borrelly in Three Dimensions: Coma and Nucleus, Science, 2002, vol. 296, pp. 1087–1091.
Tishkovets, V., Litvinov, P., Petrova, E., and Jockers, K., Backscattering Effects for Discrete Random Media: Theoretical Results, in Photopolarimetry in Remote Sensing, Videen, G., Yatskiv, Ya., Mishchenko, M., Eds., Dordrecht: Kluwer, 2004a, pp. 221–242.
Tishkovets, V.P., Petrova, E.V., and Jockers, K., Optical Properties of Aggregate Particles Comparable in Size to the Wavelength, J. Quant. Spectrosc. Radiat. Transf., 2004b, vol. 86, pp. 241–265.