Ludmilla Kolokolova
Principal Research Scientist

Department of Astronomy,

University of Maryland,

College Park, MD, 20742

Tel. (301)-405-1539,

Fax. (301)-405-3538





Physics of cosmic dust and small bodies in Solar system: comets, asteroids, Kuiper-Belt Objects


Light scattering by particles and surfaces


Polarimetry as a remote sensing method




Small Bodies Node of the NASA Planetary Data System (Archive Manager)
Light-Scattering Newsletter
Cosmic Dust Modeling Database

Cosmic Dust meeting

Main publications


Moreno, F., et al. (including Kolokolova, L.), 2018. Models of Rosetta/OSIRIS 67P dust coma phase function. The Astronomical Journal, 156(5), 237 - 246.

Protopapa, S., Kelley, M.S., Yang, B., Bauer, J.M., Kolokolova, L., Woodward, C.E., Keane, J.V. and Sunshine, J.M., 2018. Icy Grains from the Nucleus of Comet C/2013 US10 (Catalina). The Astrophysical Journal Letters, 862(2), L16-L19.

Poteet, C.A., Chen, C.H., Hines, D.C., Perrin, M.D., Debes, J.H., Pueyo, L., Schneider, G., Mazoyer, J. and Kolokolova, L., 2018. Space-based Coronagraphic Imaging Polarimetry of the TW Hydrae Disk: Shedding New Light on Self-shadowing Effects. The Astrophysical Journal, 860(2), 115 - 126.

Kolokolova, L., Nagdimunov, L. and Mackowski, D., Light Scattering by Hierarchical Aggregates. Journal of Quantitative Spectroscopy and Radiative Transfer, 204, 138-143, 2018.

Pitman, K., Kolokolova, L., Verbiscer, A., Mackowski, D., et al. 2017, Coherent Backscattering Effect in Spectra of Icy Satellites and its Modeling using Multi-Sphere T-Matrix (MSTM) Code for Layers of Particles, Planetary and. Space Science, 149, 23-31, 2018.

Rosenbush, V.K., Ivanova, O.V., Kiselev, N.N., Kolokolova, L., and Afanasiev, V.L., Spatial variations of brightness, colour and polarization of dust in comet 67P/Churyumov-Gerasimenko. Monthly Notices of the Royal Astronomical Society, 469(Suppl_2), S475-S491, 2017.

Agarwal, J., et al. (including Kolokolova, L.), Evidence of sub-surface energy storage in comet 67P from the outburst of 2016 July 03. Monthly Notices of the Royal Astronomical Society, 469(Suppl_2), S606-S625, 2017.

Masoumzadeh, N, N. Oklay, L. Kolokolova, et al. Opposition effect on comet 67P/Churyumov-Gerasimenko using Rosetta-OSIRIS images, Astronomy and Astrophysics, 599, A11-A17, 2017.

Bagnulo, S., Belskaya, I., Cellino, A. and Kolokolova, L., Polarimetry of small bodies and satellites of our Solar System. The European Physical Journal Plus, 132, 1-20, 2017.

Kimura, H., Kolokolova, L., Li, A. and Lebreton, J., Light Scattering and Thermal Emission by Primitive Dust Particles in Planetary Systems. In Light Scattering Reviews, Volume 11, Springer Berlin Heidelberg, 363-418, 2016.

Kolokolova, L., Cometary dust under the microscope. Nature, 537(7618), 37-38, 2016.

Kolokolova, L., et al. Clues to cometary circular polarization from studying magnetic field in the vicinity of the nucleus of comet 67P/Churyumov-Gerasimenko, MNRAS, 462, S422-S431, 2016.

Kelley, M.S., Woodward, C.E., Bodewits, D., Farnham, T.L., Gudipati, M.S., Harker, D.E., Hines, D.C., Knight, M.M., Kolokolova, L., Li, A. and de Pater, I., Cometary Science with the James Webb Space Telescope. Publications of the Astronomical Society of the Pacific, 128(959), p.018009, 2016.

Stinson, A., Bagnulo, S., Tozzi, G.P., Boehnhardt, H., Protopapa, S., Kolokolova, L., Muinonen, K. and Jones, G.H., Polarimetry of comets 67P/Churyumov-Gerasimenko, 74P/Smirnova-Chernykh, and 152P/Helin-Lawrence. Astronomy and Astrophysics, 594, p.A110, 2016.

Kolokolova, L., Nagdimunov, L., A`Hearn, M., King, A. and Wolff, M., Studying the nucleus of comet 9P/Tempel 1 using the structure of the Deep Impact ejecta cloud at the early stages of its development. Planetary and Space Science, 133, 76-84, 2016.

Polarization of Stars and Planetary Systems , Cambridge University Press, (Eds., Kolokolova, L., Hough, J., Levasseur-Regourd A.-Ch.), 490p., 2015.

Sparks, W., J. Hough, L. Kolokolova, Polarimetry in Astrobiology, In Polarization of Stars and Planetary Systems , Cambridge University Press, 462-479, 2015.

Kiselev, N., Rosenbush, V., Kolokolova, L., Levasseur-Regourd, A.-Ch., Polarimetry of Comets, In Polarization of Stars and Planetary Systems , Cambridge University Press, 379-405, 2015.

Kolokolova, L., Das, H. S., Dubovik, O., Lapyonok, T., and Yang, P., Polarization of cosmic dust simulated with the rough spheroid model. Planetary and Space Science, 116, 30-38, 2015.

Nagdimunov, L., Kolokolova, L., Wolff, M., A`Hearn, M. F., and Farnham, T. L., Properties of comet 9P/Tempel 1 dust immediately following excavation by Deep Impact. Planetary and Space Science, 100, 73-78, 2014

Kolokolova, L., Nagdimunov,L., Comparative analysis of polarimetric signatures of aligned and optically active ( homochiral ) dust particles , Planetary and Space Sciences, 100, 57-63, 2014

C., Ejeta, Boehnhardt, H., Bagnulo, S., Muinonen, K., Kolokolova, L.,Tozzi, G. P., Polarization of Saturn's moon Iapetus. II. Comparison of the dark and the bright sides, Astron.Astropys., 549, id.A61, 5pp., 2013.

W. Sparks, J. Hough, T. Germer, F. Robb, Frank, L. Kolokolova, Remote sensing of chiral signatures on Mars, Planetary and Space Science, 72, 111-115, 2012

A. Borovoi, Kolokolova, L., Konoshonkin, A., Glints from particulate media and wavy surfaces, J.Quant.Spectrosc. Radiat.Transfer, 113, 2542-2551, 2012


L. Kolokolova, Photopolarimetric remote sensing of aggregates in cosmic dust. In: Polarimetric Detection, Characterization, and Remote Sensing (M. I. Mishchenko, Ya. S. Yatskiv, V. K. Rosenbush, and G. Videen, Eds), Springer, Berlin, p. 261-276, 2011.


D. Mackowski, L. Kolokolova, and W. Sparks, T-matrix approach to calculating circular polarization of aggregates made of optically active materials. J. Quant. Spectrosc. Radiat. Transfer 112, 1726 1732, 2011.


L. Kolokolova, W. Sparks, D. Mackowski, Astrobiological remote sensing with circular polarization In: Polarimetric Detection, Characterization, and Remote Sensing (M. I. Mishchenko, Ya. S. Yatskiv, V. K. Rosenbush, and G. Videen, Eds.), Springer, Berlin, p. 277-294, 2011.


S. Bagnulo, I. Belskaya. H. Boehnhardt, L. Kolokolova, K. Muinonen, M. Sterzik, G.-P. Tozzi, Polarimetry of small bodies of the solar system with large telescopes, J. Quant. Spectrosc. Radiat. Transfer, 112, 2059 2067, 2011,


L. Kolokolova, E. Petrova, H. Kimura, Effects of Interaction of Electromagnetic Waves in Complex Particles, In: Electromagnetic Waves (V. Zhurbenko, Ed.) , InTech, Vienna, ISSN 978-953-307-304-0, p. 173 - 202, 2011.


K. Meech, M. A`Hearn et al. (193 co-authors including L. Kolokolova), EPOXI: 103P/Hartley 2 Observations from a Worldwide Campaign, Astroph. J.Let., 734, Issue 1, article id. L1, 2011.


G. P. Tozzi,, Patriarchi, P., Boehnhardt, H., Vincent, J.-B., Licandro, J., Kolokolova, L., Schulz, R., Stuewe, J. Evolution of the dust coma in comet 67P/Churyumov-Gerasimenko before the 2009 perihelion, Astron. Astrophys., 531, id.A54, 2011.


Ch. Woodward, T. J. Jones, B. Brown, E. L. Ryan, M. Krejny, L. Kolokolova, M. S. Kelley, D. E. Harker, M. L. Sitko, Dust in Comet C/2007 N3 (Lulin), Astron. J., 141, Issue 6, article id. 181, 2011.


L. Kolokolova,, L. Li , B. Buratti, M. Mishchenko, Modeling variations in the near-infrared spectra produced by the coherent backscattering effect, J. Quant. Spectrosc. Radiat. Transfer, 112, 2175-2181, 2011.


I. Belskaya, S. Bagnulo, M.A. Barucci, K. Muinonen, G.P. Tozzi, S. Fornasier, L. Kolokolova, Polarimetry of Centaurs (2060) Chiron, (5145) Pholus and (10199) Chariklo, Icarus, 210, 472-479, 2010.


L. Kolokolova, and Kimura, H., Effects of Electromagnetic Interaction in the Polarization of Light Scattered by Cometary and Other Types of Cosmic Dust, Astron.Astroph., 513, 40, 2010.


L. Kolokolova, B. Buratti, and V. Tishkovets, Impact of coherent backscattering on the spectra of icy satellites of Saturn and the implications of its effects for remote sensing, Astroph. J. Let., 711, L71-L75, 2010.


L. Kolokolova, and Kimura H., Comet Dust as a Mixture of Aggregates and Solid Particles: Model Consistent with Ground-Based and Space-Mission Results, Earth, Planets and Space, 62, 17-22, 2010.


H. Boehnhardt, Tozzi, G. P.; Sterzik, M.; Bagnulo, S.; Kolokolova, L.; Muinonen, K. Polarimetry in Planetary Science: A Step Forward with the VLT and a Need for the ELTs , Earth, Moon, & Planets, 105, 95-100, 2009


W. Sparks, Hough, J.H., Germer, T.A., Chen, F., DasSarma, S., DasSarma, P., Robb, F.T., Manset, N. ,Kolokolova, L., Reid, I.N., Macchetto, D., Martin, W. Detection of Circular Polarization in Light Scattered from Photosynthetic Microbes, Proceedings of the National Academy of Sciences, 106, 7816-7821, 2010


W. Sparks, J. H. Hough, L. Kolokolova, T. Germer, F. Chen, S. DasSarma, P.DasSarma, F. Robb, N. Manset, I.N. Reid, F. D. Macchetto, W. Martin, Circular Polarization in Scattered Light as a Possible Biomarker, J. Quant. Spectrosc, & Radiat. Transfer, 110, 1771-1779, 2009


V. Rosenbush, KiselevN.. Kolokolova, L.; Velichko, S.; Velichko, F.; Antoniuk, K.; Kolesnikov, S. Polarization properties of odd comet 17P/Holmes, J. Quant. Spectrosc. & Radiat. Transfer, 110, 1719-1725, 2009


N. Kiselev, Rosenbush, V., Kolokolova, L., Antonyuk K., The anomalous spectral dependence of polarization in comets, Journal of Quant. Spectrosc. and Radiative Transfer, 109, 1384-1389, 20


S. Bagnulo, Belskaya, I., Muinonen, K., Tozzi, G. P., Barucci, M. A., Kolokolova, L., Fornasier, S. Discovery of two distinct polarimetric behaviours of trans-Neptunian objects, Astronomy and Astrophysics Letters, 491, 33-35, 2008


H. Boehnhardt, Tozzi, G. P., Bagnulo, S., Muinonen, K., Nathues, A., Kolokolova, L., Photometry and polarimetry of the nucleus of comet 2P/Encke, Astron. Astroph., 489, 1337-1343, 2008


I. BelskayaBagnulo, S.; Muinonen, K.; Barucci, M. A.; Tozzi, G. P.; Fornasier, S.; Kolokolova, L., Polarimetry of the dwarf planet (136199) Eris, Astron. Astrophys. 479, 265 - 269, 2008


G. P. Tozzi, Boehnhardt, H., Kolokolova, L., Bonev, T., Pompei, E., Bagnulo, S., Ageorges, N., Barrera, L., Hainaut, O., Kaeufl, H. U., and 8 coauthors, Dust observations of Comet 9P/Tempel 1 at the time of the Deep Impact, Astron. Astrophys., 476, 979 - 988, 2008


T. J. Jones, D. Stark, C. E. Woodward, M. Kelley, L. Kolokolova, D. Clemens, A. Pinnick,. Evidence of Fragmenting Dust Particles from Near-Simultaneous Optical and Near-Infrared Photometry and Polarimetry of Comet 73P/Schwassmann-Wachmann 3, Astron. J., 135, 1318-1327, 2008.


D. Harrington, K Meech, L. Kolokolova, J. R. Kuhn, and K. Whitman, Spectropolarimetry of the Deep Impact target comet 9P/Tempel 1 with HiVIS , Icarus, 187, 177-184, 2007


L. Kolokolova, H. Kimura, N. Kiselev, and V. Rosenbush, Polarimetric and infrared evidence of two types of dust in comets, Astron. Astrophys., 463, 1189-1196, 2007


V. Rosenbush, L. Kolokolova, A. Lazarian, N. Shakhovskoj, and N. Kiselev, Circular polarization in comets: Observations of comet C/1999 S4 (LINEAR) and tentative interpretation, Icarus, 186, 317-330, 2007

L. Kolokolova, H. Kimura, K. Ziegler, and I. Mann, Light-scattering properties of random-oriented aggregates: Do they represent the properties of an ensemble of aggregates? J. Quant. Spectrosc. and Radiative Transfer, 100, 199-206, 2006.

S. Bagnulo, H. Boehnhardt, K. Muinonen, L. Kolokolova, I. Belskaya, I., M. A. Barucci, Exploring the surface properties of transneptunian objects and Centaurs with polarimetric FORS1/VLT observations, Astron.Astroph. 450, 1239-1243, 2006.

G. P. Tozzi, L. M. Lara, L. Kolokolova, H. Boehnhardt, J. Licandro, R. Schulz, Sublimating components in the coma of comet C/2000 WM1(LINEAR), Astron.Astrophys. 424, 325-331, 2004.

J. Thomas-Osip, B. A. S., Gustafson, L. Kolokolova, Y.-L. Xu, An investigation of Titan's aerosols using microwave analog measurements and radiative transfer modeling, Icarus, 179, 511-516, 2005.

L. Kolokolova, M. Hanner, A-Ch. Levasseur-Regourd, and B. A. S. Gustafson, Physical properties of cometary dust from light scattering and emission, in Comets II, Univ. of Arizona Press, 577-604, 2004.

L .Kolokolova, H. Kimura, and I. Mann, Characterization of dust particles using photopolarimetric data: Example of cometary dust, in Photopolarimetry in Remote Sensing, (Eds. G. Videen, Ya. Yatskiv, and M. Mishchenko), Kluwer Academic Publishers, Dordrecht, The Netherlands, 431-454, 2004.

G. P. Tozzi, L. M. Lara, L. Kolokolova, H. Boehnhardt, J. Licandro, and R. Schulz, Sublimating components in the coma of comet C/2001 WM1 LINEAR, Astron. Astrophys., 424, 325-330, 2004.

H. Boehnhardt, S. Bagnulo, K. Muinonen, M. A. Barucci, L. Kolokolova, E. Dotto, and G. P. Tozzi, Surface characterization of 28978 Ixion (2001 KX76), Astron. Astrophys., 415, L21-L25, 2004.

I. Mann, H. Kimura, and L. Kolokolova, A comprehensive model to describe light scattering properties of cometary dust, J. Quant. Spectrosc. Radiat. Transfer, 89, 291-301, 2004.

K. Ziegler and L. Kolokolova, Light scattering in an ensemble of complex particles: random matrix approach, J. Quant. Spectrosc. Radiat. Transfer, 88, 173-181, 2004.

H. Boehnhardt, S. Bagnulo, K. Muinonen, M. A. Barucci, L. Kolokolova, E. Dotto, and G. P. Tozzi, Surface characterization of 28978 Ixion (2001 KX76), Astron. Astrophys., 415, L21-L25, 2004.

H. Kimura, L. Kolokolova, and I. Mann, Optical properties of cometary dust: Constraints from numerical studies on light scattering by aggregate particles, Astron. Astrophys., 407, L5-L8, 2003

L. Kolokolova, L. Lara, R. Schultz, J. Stuewe, and G. P. Tozzi Color of an ensemble of particles with a wide power-law size distribution: application to observations of Comet Hale-Bopp at 3 AU, Journal of Quant. Spectr.Radiat. Transer., 79-80, 861-871, 2003

L. Kolokolova and B. A. S. Gustafson, Scattering by inhomogeneous particles: Microwave analog experiment comparison to effective medium theories, J. Quant. Spectrosc. Radiat. Transfer, 70, 611-625, 2001

B. A. S. Gustafson, J. M. Greenberg, L. Kolokolova, Y. Xu, and R. Stognienko. Interactions with Electromagnetic Radiation: Theory and Laboratory Simulations, in: Interplanetary Dust , (Gruen, Gustafson, Dermott, and Fechtig, Eds.), Springer-Verlag, Berlin Heidelberg New York, 509-569, 2001

L. Kolokolova, L. M. Lara, R. Schulz, J. Stuewe, and G. P. Tozzi, Properties and Evolution of Dust in Comet Tabur (C/1996~Q1) from the Color Maps, Icarus, 153, 197-207, 2001

L. Kolokolova, B. A. S. Gustafson, K. Jockers, and G.Lichtenberg, Properties and evolution of cometary dust in near-nucleus coma from their color and polarization, J.Geophys.Res., 106, 10113-10128, 2001

B. A. S. Gustafson and L. Kolokolova, A Systematic Study of Light Scattering by Aggregate Particles Using the Microwave Analog Technique: Angular and Wavelength Dependence of Intensity and Polarization, J.Geophys.Res., 104, 31711-31720, 1999

B. A. S. Gustafson, L. Kolokolova, J. E. Thomas-Osip, K. W. T. Waldemarsson, J. Loesel, and Y-l. Xu, Scattering by Complex Systems II:Results from Microwave Measurements, in Formation and Evolution of Solids in Space , eds. J. M. Greenberg and A. Li, (Dordrecht: Kluwer Academic Publishers), 549-564, 1998

L. Kolokolova and K. Jockers, Composition of Cometary dust from Polarization Spectra, Planet. and Sp.Science, 45, 1543-1550, 1997

L. Kolokolova and A. Zaitcev, Ground-based radar experiments for the study of radiation scattering by atmosphereless celestial bodies, Astronomical and Astrophysical Transactions , 13, 1-9, 1997

L. Kolokolova, K. Jockers, G. Chernova, and N. Kiselev, Properties of Cometary Dust from the Color and Polarization, Icarus, 126, 351-361, 1997

L. Kolokolova, M. I. Mishchenko, and M. Wolff, On the negative polarization of light scattered by subwavelength regolithic grains , Mon.Not.of Royal Astron.Soc., 260, 550-552, 1993

 V. Degtjarev and L. O. Kolokolova, Possible Application of Circular Polarization for Remote Sensing of Cosmic Bodies, Earth, Moon and Planets, 57, 213-223, 312, 1992

 V. Degtjarev, A. V. Morozhenko, L. O. Kolokolova, and M. F. Tsurul, Diagnostic abilities of circular polarization for atmosphereless bodies, Soviet Astronomy Letters, 18, 279-283, 1992

 L. Kolokolova, Dependence of Polarization on Optical and Structural Properties of the Surfaces of Atmosphereless Bodies, Icarus, 84, 305-314, 1990

 L. Kolokolova and E. G. Yanovitskij, One More Possibility for Asteroid Diameters Determination from Polarimetric Data, Kinemat. and Phys. of Celest. Bodies, 4, N 1, p. 82-84, 1988

O. Kvaratskheliya and L. Kolokolova, The Lunar Samples Difference from the Natural Lunar Surface, Kinemat. and Phys. of Celest. Bodies, 3, N 5, 90-92, 1987

L. Kolokolova, Study of Some Statistical Relationships for Polarimetric Quantities of Atmosphereless Bodies, Kinemat. and Phys. of Celest. Bodies, 3, N 5, 47-52, 1987

A. Morozhenko, L. Kolokolova, E. A. Kajmakov and I. S. Lyzunkova, Possible Nature of Cometary Atmosphere Particles, Icarus, 66, 223-229, 1986

L. Kolokolova, Influence of Surface Structure of Atmosphereless Bodies on Polarization of Light Scattered by Them, Astronomicheskij Vestnik (Solar System), 19, 165-173, 1985

L. Kolokolova and A. F. Steklov, Possibility of Microorganism Origin in Jovian Satellites, Microbiological Journal of Academy of Sciences of UkrSSR, 43, 791-796, 1981

L. Kolokolova and A. F. Steklov, A New Possibility of Life Origin for Celestial Bodies, Reports of Academy of Sciences of Ukrainian SSR, B, N 7, 62-64, 1981