Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020

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Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020. / Morgado, B. E.; Sicardy, B.; Braga-Ribas, F.; Desmars, J.; Gomes-Junior, A. R.; Berard, D.; Leiva, R.; Ortiz, J. L.; Vieira-Martins, R.; Benedetti-Rossi, G.; Santos-Sanz, P.; Camargo, J. I. B.; Duffard, R.; Rommel, F. L.; Assafin, M.; Boufleur, R. C.; Colas, F.; Kretlow, M.; Beisker, W.; Sfair, R.; Snodgrass, C.; Morales, N.; Fernandez-Valenzuela, E.; Amaral, L. S.; Amarante, A.; Artola, R. A.; Backes, M.; Bath, K. -L.; Bouley, S.; Buie, M. W.; Cacella, P.; Colazo, C. A.; Colque, J. P.; Dauvergne, J. -L.; Dominik, M.; Emilio, M.; Erickson, C.; Evans, R.; Fabrega-Polleri, J.; Garcia-Lambas, D.; Giacchini, B. L.; Hanna, W.; Herald, D.; Hesler, G.; Hinse, T. C.; Jacques, C.; Jehin, E.; Jorgensen, U. G.; Kerr, S.; Kouprianov, V.; Levine, S. E.; Linder, T.; Maley, P. D.; Machado, D. I.; Maquet, L.; Maury, A.; Melia, R.; Meza, E.; Mondon, B.; Moura, T.; Newman, J.; Payet, T.; Pereira, C. L.; Pollock, J.; Poltronieri, R. C.; Quispe-Huaynasi, F.; Reichart, D.; de Santana, T.; Schneiter, E. M.; Sieyra, M. V.; Skottfelt, J.; Soulier, J. F.; Starck, M.; Thierry, P.; Torres, P. J.; Trabuco, L. L.; Unda-Sanzana, E.; Yamashita, T. A. R.; Winter, O. C.; Zapata, A.; Zuluaga, C. A.

In: Astronomy & Astrophysics, Vol. 652, A141, 25.08.2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Morgado, BE, Sicardy, B, Braga-Ribas, F, Desmars, J, Gomes-Junior, AR, Berard, D, Leiva, R, Ortiz, JL, Vieira-Martins, R, Benedetti-Rossi, G, Santos-Sanz, P, Camargo, JIB, Duffard, R, Rommel, FL, Assafin, M, Boufleur, RC, Colas, F, Kretlow, M, Beisker, W, Sfair, R, Snodgrass, C, Morales, N, Fernandez-Valenzuela, E, Amaral, LS, Amarante, A, Artola, RA, Backes, M, Bath, K-L, Bouley, S, Buie, MW, Cacella, P, Colazo, CA, Colque, JP, Dauvergne, J-L, Dominik, M, Emilio, M, Erickson, C, Evans, R, Fabrega-Polleri, J, Garcia-Lambas, D, Giacchini, BL, Hanna, W, Herald, D, Hesler, G, Hinse, TC, Jacques, C, Jehin, E, Jorgensen, UG, Kerr, S, Kouprianov, V, Levine, SE, Linder, T, Maley, PD, Machado, DI, Maquet, L, Maury, A, Melia, R, Meza, E, Mondon, B, Moura, T, Newman, J, Payet, T, Pereira, CL, Pollock, J, Poltronieri, RC, Quispe-Huaynasi, F, Reichart, D, de Santana, T, Schneiter, EM, Sieyra, MV, Skottfelt, J, Soulier, JF, Starck, M, Thierry, P, Torres, PJ, Trabuco, LL, Unda-Sanzana, E, Yamashita, TAR, Winter, OC, Zapata, A & Zuluaga, CA 2021, 'Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020', Astronomy & Astrophysics, vol. 652, A141. https://doi.org/10.1051/0004-6361/202141543

APA

Morgado, B. E., Sicardy, B., Braga-Ribas, F., Desmars, J., Gomes-Junior, A. R., Berard, D., Leiva, R., Ortiz, J. L., Vieira-Martins, R., Benedetti-Rossi, G., Santos-Sanz, P., Camargo, J. I. B., Duffard, R., Rommel, F. L., Assafin, M., Boufleur, R. C., Colas, F., Kretlow, M., Beisker, W., ... Zuluaga, C. A. (2021). Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020. Astronomy & Astrophysics, 652, [A141]. https://doi.org/10.1051/0004-6361/202141543

Vancouver

Morgado BE, Sicardy B, Braga-Ribas F, Desmars J, Gomes-Junior AR, Berard D et al. Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020. Astronomy & Astrophysics. 2021 Aug 25;652. A141. https://doi.org/10.1051/0004-6361/202141543

Author

Morgado, B. E. ; Sicardy, B. ; Braga-Ribas, F. ; Desmars, J. ; Gomes-Junior, A. R. ; Berard, D. ; Leiva, R. ; Ortiz, J. L. ; Vieira-Martins, R. ; Benedetti-Rossi, G. ; Santos-Sanz, P. ; Camargo, J. I. B. ; Duffard, R. ; Rommel, F. L. ; Assafin, M. ; Boufleur, R. C. ; Colas, F. ; Kretlow, M. ; Beisker, W. ; Sfair, R. ; Snodgrass, C. ; Morales, N. ; Fernandez-Valenzuela, E. ; Amaral, L. S. ; Amarante, A. ; Artola, R. A. ; Backes, M. ; Bath, K. -L. ; Bouley, S. ; Buie, M. W. ; Cacella, P. ; Colazo, C. A. ; Colque, J. P. ; Dauvergne, J. -L. ; Dominik, M. ; Emilio, M. ; Erickson, C. ; Evans, R. ; Fabrega-Polleri, J. ; Garcia-Lambas, D. ; Giacchini, B. L. ; Hanna, W. ; Herald, D. ; Hesler, G. ; Hinse, T. C. ; Jacques, C. ; Jehin, E. ; Jorgensen, U. G. ; Kerr, S. ; Kouprianov, V. ; Levine, S. E. ; Linder, T. ; Maley, P. D. ; Machado, D. I. ; Maquet, L. ; Maury, A. ; Melia, R. ; Meza, E. ; Mondon, B. ; Moura, T. ; Newman, J. ; Payet, T. ; Pereira, C. L. ; Pollock, J. ; Poltronieri, R. C. ; Quispe-Huaynasi, F. ; Reichart, D. ; de Santana, T. ; Schneiter, E. M. ; Sieyra, M. V. ; Skottfelt, J. ; Soulier, J. F. ; Starck, M. ; Thierry, P. ; Torres, P. J. ; Trabuco, L. L. ; Unda-Sanzana, E. ; Yamashita, T. A. R. ; Winter, O. C. ; Zapata, A. ; Zuluaga, C. A. / Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020. In: Astronomy & Astrophysics. 2021 ; Vol. 652.

Bibtex

@article{7853e3b9efc644e4959fa98e76d8539f,
title = "Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020",
abstract = "Context. The Centaur (10199) Chariklo has the first ring system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow sizes and shapes to be determined with kilometre accuracy, and provide the characteristics of the occulting object and its vicinity.Aims. Using stellar occultations observed between 2017 and 2020, our aim is to constrain the physical parameters of Chariklo and its rings. We also determine the structure of the rings, and obtain precise astrometrical positions of Chariklo.Methods. We predicted and organised several observational campaigns of stellar occultations by Chariklo. Occultation light curves were measured from the datasets, from which ingress and egress times, and the ring widths and opacity values were obtained. These measurements, combined with results from previous works, allow us to obtain significant constraints on Chariklo's shape and ring structure.Results. We characterise Chariklo's ring system (C1R and C2R), and obtain radii and pole orientations that are consistent with, but more accurate than, results from previous occultations. We confirm the detection of W-shaped structures within C1R and an evident variation in radial width. The observed width ranges between 4.8 and 9.1 km with a mean value of 6.5 km. One dual observation (visible and red) does not reveal any differences in the C1R opacity profiles, indicating a ring particle size larger than a few microns. The C1R ring eccentricity is found to be smaller than 0.022 (3 sigma), and its width variations may indicate an eccentricity higher than similar to 0.005. We fit a tri-axial shape to Chariklo's detections over 11 occultations, and determine that Chariklo is consistent with an ellipsoid with semi-axes of 143.8(-1.5)(+1.4), 135.2(-2.8)(+1.4), and 99.1(-2.7)(+5.4) km. Ultimately, we provided seven astrometric positions at a milliarcsecond accuracy level, based on Gaia EDR3, and use it to improve Chariklo's ephemeris.",
keywords = "occultations, methods: observational, methods: data analysis, minor planets, asteroids: individual: Chariklo, planets and satellites: rings, TRANS-NEPTUNIAN OBJECTS, URANIAN RINGS, CENTAURS, SIZE, SYSTEM, SHAPE",
author = "Morgado, {B. E.} and B. Sicardy and F. Braga-Ribas and J. Desmars and Gomes-Junior, {A. R.} and D. Berard and R. Leiva and Ortiz, {J. L.} and R. Vieira-Martins and G. Benedetti-Rossi and P. Santos-Sanz and Camargo, {J. I. B.} and R. Duffard and Rommel, {F. L.} and M. Assafin and Boufleur, {R. C.} and F. Colas and M. Kretlow and W. Beisker and R. Sfair and C. Snodgrass and N. Morales and E. Fernandez-Valenzuela and Amaral, {L. S.} and A. Amarante and Artola, {R. A.} and M. Backes and Bath, {K. -L.} and S. Bouley and Buie, {M. W.} and P. Cacella and Colazo, {C. A.} and Colque, {J. P.} and Dauvergne, {J. -L.} and M. Dominik and M. Emilio and C. Erickson and R. Evans and J. Fabrega-Polleri and D. Garcia-Lambas and Giacchini, {B. L.} and W. Hanna and D. Herald and G. Hesler and Hinse, {T. C.} and C. Jacques and E. Jehin and Jorgensen, {U. G.} and S. Kerr and V. Kouprianov and Levine, {S. E.} and T. Linder and Maley, {P. D.} and Machado, {D. I.} and L. Maquet and A. Maury and R. Melia and E. Meza and B. Mondon and T. Moura and J. Newman and T. Payet and Pereira, {C. L.} and J. Pollock and Poltronieri, {R. C.} and F. Quispe-Huaynasi and D. Reichart and {de Santana}, T. and Schneiter, {E. M.} and Sieyra, {M. V.} and J. Skottfelt and Soulier, {J. F.} and M. Starck and P. Thierry and Torres, {P. J.} and Trabuco, {L. L.} and E. Unda-Sanzana and Yamashita, {T. A. R.} and Winter, {O. C.} and A. Zapata and Zuluaga, {C. A.}",
year = "2021",
month = aug,
day = "25",
doi = "10.1051/0004-6361/202141543",
language = "English",
volume = "652",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020

AU - Morgado, B. E.

AU - Sicardy, B.

AU - Braga-Ribas, F.

AU - Desmars, J.

AU - Gomes-Junior, A. R.

AU - Berard, D.

AU - Leiva, R.

AU - Ortiz, J. L.

AU - Vieira-Martins, R.

AU - Benedetti-Rossi, G.

AU - Santos-Sanz, P.

AU - Camargo, J. I. B.

AU - Duffard, R.

AU - Rommel, F. L.

AU - Assafin, M.

AU - Boufleur, R. C.

AU - Colas, F.

AU - Kretlow, M.

AU - Beisker, W.

AU - Sfair, R.

AU - Snodgrass, C.

AU - Morales, N.

AU - Fernandez-Valenzuela, E.

AU - Amaral, L. S.

AU - Amarante, A.

AU - Artola, R. A.

AU - Backes, M.

AU - Bath, K. -L.

AU - Bouley, S.

AU - Buie, M. W.

AU - Cacella, P.

AU - Colazo, C. A.

AU - Colque, J. P.

AU - Dauvergne, J. -L.

AU - Dominik, M.

AU - Emilio, M.

AU - Erickson, C.

AU - Evans, R.

AU - Fabrega-Polleri, J.

AU - Garcia-Lambas, D.

AU - Giacchini, B. L.

AU - Hanna, W.

AU - Herald, D.

AU - Hesler, G.

AU - Hinse, T. C.

AU - Jacques, C.

AU - Jehin, E.

AU - Jorgensen, U. G.

AU - Kerr, S.

AU - Kouprianov, V.

AU - Levine, S. E.

AU - Linder, T.

AU - Maley, P. D.

AU - Machado, D. I.

AU - Maquet, L.

AU - Maury, A.

AU - Melia, R.

AU - Meza, E.

AU - Mondon, B.

AU - Moura, T.

AU - Newman, J.

AU - Payet, T.

AU - Pereira, C. L.

AU - Pollock, J.

AU - Poltronieri, R. C.

AU - Quispe-Huaynasi, F.

AU - Reichart, D.

AU - de Santana, T.

AU - Schneiter, E. M.

AU - Sieyra, M. V.

AU - Skottfelt, J.

AU - Soulier, J. F.

AU - Starck, M.

AU - Thierry, P.

AU - Torres, P. J.

AU - Trabuco, L. L.

AU - Unda-Sanzana, E.

AU - Yamashita, T. A. R.

AU - Winter, O. C.

AU - Zapata, A.

AU - Zuluaga, C. A.

PY - 2021/8/25

Y1 - 2021/8/25

N2 - Context. The Centaur (10199) Chariklo has the first ring system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow sizes and shapes to be determined with kilometre accuracy, and provide the characteristics of the occulting object and its vicinity.Aims. Using stellar occultations observed between 2017 and 2020, our aim is to constrain the physical parameters of Chariklo and its rings. We also determine the structure of the rings, and obtain precise astrometrical positions of Chariklo.Methods. We predicted and organised several observational campaigns of stellar occultations by Chariklo. Occultation light curves were measured from the datasets, from which ingress and egress times, and the ring widths and opacity values were obtained. These measurements, combined with results from previous works, allow us to obtain significant constraints on Chariklo's shape and ring structure.Results. We characterise Chariklo's ring system (C1R and C2R), and obtain radii and pole orientations that are consistent with, but more accurate than, results from previous occultations. We confirm the detection of W-shaped structures within C1R and an evident variation in radial width. The observed width ranges between 4.8 and 9.1 km with a mean value of 6.5 km. One dual observation (visible and red) does not reveal any differences in the C1R opacity profiles, indicating a ring particle size larger than a few microns. The C1R ring eccentricity is found to be smaller than 0.022 (3 sigma), and its width variations may indicate an eccentricity higher than similar to 0.005. We fit a tri-axial shape to Chariklo's detections over 11 occultations, and determine that Chariklo is consistent with an ellipsoid with semi-axes of 143.8(-1.5)(+1.4), 135.2(-2.8)(+1.4), and 99.1(-2.7)(+5.4) km. Ultimately, we provided seven astrometric positions at a milliarcsecond accuracy level, based on Gaia EDR3, and use it to improve Chariklo's ephemeris.

AB - Context. The Centaur (10199) Chariklo has the first ring system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow sizes and shapes to be determined with kilometre accuracy, and provide the characteristics of the occulting object and its vicinity.Aims. Using stellar occultations observed between 2017 and 2020, our aim is to constrain the physical parameters of Chariklo and its rings. We also determine the structure of the rings, and obtain precise astrometrical positions of Chariklo.Methods. We predicted and organised several observational campaigns of stellar occultations by Chariklo. Occultation light curves were measured from the datasets, from which ingress and egress times, and the ring widths and opacity values were obtained. These measurements, combined with results from previous works, allow us to obtain significant constraints on Chariklo's shape and ring structure.Results. We characterise Chariklo's ring system (C1R and C2R), and obtain radii and pole orientations that are consistent with, but more accurate than, results from previous occultations. We confirm the detection of W-shaped structures within C1R and an evident variation in radial width. The observed width ranges between 4.8 and 9.1 km with a mean value of 6.5 km. One dual observation (visible and red) does not reveal any differences in the C1R opacity profiles, indicating a ring particle size larger than a few microns. The C1R ring eccentricity is found to be smaller than 0.022 (3 sigma), and its width variations may indicate an eccentricity higher than similar to 0.005. We fit a tri-axial shape to Chariklo's detections over 11 occultations, and determine that Chariklo is consistent with an ellipsoid with semi-axes of 143.8(-1.5)(+1.4), 135.2(-2.8)(+1.4), and 99.1(-2.7)(+5.4) km. Ultimately, we provided seven astrometric positions at a milliarcsecond accuracy level, based on Gaia EDR3, and use it to improve Chariklo's ephemeris.

KW - occultations

KW - methods: observational

KW - methods: data analysis

KW - minor planets

KW - asteroids: individual: Chariklo

KW - planets and satellites: rings

KW - TRANS-NEPTUNIAN OBJECTS

KW - URANIAN RINGS

KW - CENTAURS

KW - SIZE

KW - SYSTEM

KW - SHAPE

U2 - 10.1051/0004-6361/202141543

DO - 10.1051/0004-6361/202141543

M3 - Journal article

VL - 652

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A141

ER -

ID: 278310066