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The impact crater at the origin of the Julia family detected with VLT/SPHERE?

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The impact crater at the origin of the Julia family detected with VLT/SPHERE? / Vernazza, P.; Broz, M.; Drouard, A.; Hanuš, J.; Viikinkoski, M.; Marsset, M.; Jorda, L.; Fetick, R.; Carry, B.; Marchis, F.; Birlan, M.; Fusco, T.; Santana-Ros, T.; Podlewska-Gaca, E.; Jehin, E.; Ferrais, M.; Bartczak, P.; Dudziński, G.; Berthier, J.; Castillo-Rogez, J.; Cipriani, F.; Colas, F.; Dumas, C.; Urech, J.; Kaasalainen, M.; Kryszczynska, A.; Lamy, P.; Le Coroller, H.; Marciniak, A.; Michalowski, T.; Michel, P.; Pajuelo, M.; Tanga, P.; Vachier, F.; Vigan, A.; Warner, B.; Witasse, O.; Yang, B.; Asphaug, E.; Richardson, D. C.; Ševeček, P.; Gillon, M.; Benkhaldoun, Z.

In: Astronomy and Astrophysics, Vol. 618, 33477, 01.10.2018.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Vernazza, P, Broz, M, Drouard, A, Hanuš, J, Viikinkoski, M, Marsset, M, Jorda, L, Fetick, R, Carry, B, Marchis, F, Birlan, M, Fusco, T, Santana-Ros, T, Podlewska-Gaca, E, Jehin, E, Ferrais, M, Bartczak, P, Dudziński, G, Berthier, J, Castillo-Rogez, J, Cipriani, F, Colas, F, Dumas, C, Urech, J, Kaasalainen, M, Kryszczynska, A, Lamy, P, Le Coroller, H, Marciniak, A, Michalowski, T, Michel, P, Pajuelo, M, Tanga, P, Vachier, F, Vigan, A, Warner, B, Witasse, O, Yang, B, Asphaug, E, Richardson, DC, Ševeček, P, Gillon, M & Benkhaldoun, Z 2018, 'The impact crater at the origin of the Julia family detected with VLT/SPHERE?', Astronomy and Astrophysics, vol. 618, 33477. https://doi.org/10.1051/0004-6361/201833477

APA

Vernazza, P., Broz, M., Drouard, A., Hanuš, J., Viikinkoski, M., Marsset, M., ... Benkhaldoun, Z. (2018). The impact crater at the origin of the Julia family detected with VLT/SPHERE? Astronomy and Astrophysics, 618, [33477]. https://doi.org/10.1051/0004-6361/201833477

Vancouver

Vernazza P, Broz M, Drouard A, Hanuš J, Viikinkoski M, Marsset M et al. The impact crater at the origin of the Julia family detected with VLT/SPHERE? Astronomy and Astrophysics. 2018 Oct 1;618. 33477. https://doi.org/10.1051/0004-6361/201833477

Author

Vernazza, P. ; Broz, M. ; Drouard, A. ; Hanuš, J. ; Viikinkoski, M. ; Marsset, M. ; Jorda, L. ; Fetick, R. ; Carry, B. ; Marchis, F. ; Birlan, M. ; Fusco, T. ; Santana-Ros, T. ; Podlewska-Gaca, E. ; Jehin, E. ; Ferrais, M. ; Bartczak, P. ; Dudziński, G. ; Berthier, J. ; Castillo-Rogez, J. ; Cipriani, F. ; Colas, F. ; Dumas, C. ; Urech, J. ; Kaasalainen, M. ; Kryszczynska, A. ; Lamy, P. ; Le Coroller, H. ; Marciniak, A. ; Michalowski, T. ; Michel, P. ; Pajuelo, M. ; Tanga, P. ; Vachier, F. ; Vigan, A. ; Warner, B. ; Witasse, O. ; Yang, B. ; Asphaug, E. ; Richardson, D. C. ; Ševeček, P. ; Gillon, M. ; Benkhaldoun, Z. / The impact crater at the origin of the Julia family detected with VLT/SPHERE?. In: Astronomy and Astrophysics. 2018 ; Vol. 618.

Bibtex - Download

@article{43fe59f620234a90ad8cc4a7b4ea3a30,
title = "The impact crater at the origin of the Julia family detected with VLT/SPHERE?",
abstract = "Context. The vast majority of the geophysical and geological constraints (e.g., internal structure, cratering history) for main-belt asteroids have so far been obtained via dedicated interplanetary missions (e.g., ESA Rosetta, NASA Dawn). The high angular resolution of SPHERE/ZIMPOL, the new-generation visible adaptive-optics camera at ESO VLT, implies that these science objectives can now be investigated from the ground for a large fraction of D 100 km main-belt asteroids. The sharp images acquired by this instrument can be used to accurately constrain the shape and thus volume of these bodies (hence density when combined with mass estimates) and to characterize the distribution and topography of D 30 km craters across their surfaces. Aims. Here, via several complementary approaches, we evaluated the recently proposed hypothesis that the S-type asteroid (89) Julia is the parent body of a small compact asteroid family that formed via a cratering collisional event. Methods. We observed (89) Julia with VLT/SPHERE/ZIMPOL throughout its rotation, derived its 3D shape, and performed a reconnaissance and characterization of the largest craters. We also performed numerical simulations to first confirm the existence of the Julia family and to determine its age and the size of the impact crater at its origin. Finally, we utilized the images/3D shape in an attempt to identify the origin location of the small collisional family. Results. On the one hand, our VLT/SPHERE observations reveal the presence of a large crater (D 75 km) in Julias southern hemisphere. On the other hand, our numerical simulations suggest that (89) Julia was impacted 30-120 Myrs ago by a D 8 km asteroid, thereby creating a D 60 km impact crater at the surface of Julia. Given the small size of the impactor, the obliquity of Julia and the particular orientation of the family in the (a,i) space, the imaged impact crater is likely to be the origin of the family. Conclusions. New doors into ground-based asteroid exploration, namely, geophysics and geology, are being opened thanks to the unique capabilities of VLT/SPHERE. Also, the present work may represent the beginning of a new era of asteroid-family studies. In the fields of geophysics, geology, and asteroid family studies, the future will only get brighter with the forthcoming arrival of 30-40 m class telescopes like ELT, TMT, and GMT.",
keywords = "Methods: numerical, Methods: observational, Minor planets asteroids: individual: (89) Julia, Techniques: high angular resolution",
author = "P. Vernazza and M. Broz and A. Drouard and J. Hanuš and M. Viikinkoski and M. Marsset and L. Jorda and R. Fetick and B. Carry and F. Marchis and M. Birlan and T. Fusco and T. Santana-Ros and E. Podlewska-Gaca and E. Jehin and M. Ferrais and P. Bartczak and G. Dudziński and J. Berthier and J. Castillo-Rogez and F. Cipriani and F. Colas and C. Dumas and J. Urech and M. Kaasalainen and A. Kryszczynska and P. Lamy and {Le Coroller}, H. and A. Marciniak and T. Michalowski and P. Michel and M. Pajuelo and P. Tanga and F. Vachier and A. Vigan and B. Warner and O. Witasse and B. Yang and E. Asphaug and Richardson, {D. C.} and P. Ševeček and M. Gillon and Z. Benkhaldoun",
year = "2018",
month = "10",
day = "1",
doi = "10.1051/0004-6361/201833477",
language = "English",
volume = "618",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - The impact crater at the origin of the Julia family detected with VLT/SPHERE?

AU - Vernazza, P.

AU - Broz, M.

AU - Drouard, A.

AU - Hanuš, J.

AU - Viikinkoski, M.

AU - Marsset, M.

AU - Jorda, L.

AU - Fetick, R.

AU - Carry, B.

AU - Marchis, F.

AU - Birlan, M.

AU - Fusco, T.

AU - Santana-Ros, T.

AU - Podlewska-Gaca, E.

AU - Jehin, E.

AU - Ferrais, M.

AU - Bartczak, P.

AU - Dudziński, G.

AU - Berthier, J.

AU - Castillo-Rogez, J.

AU - Cipriani, F.

AU - Colas, F.

AU - Dumas, C.

AU - Urech, J.

AU - Kaasalainen, M.

AU - Kryszczynska, A.

AU - Lamy, P.

AU - Le Coroller, H.

AU - Marciniak, A.

AU - Michalowski, T.

AU - Michel, P.

AU - Pajuelo, M.

AU - Tanga, P.

AU - Vachier, F.

AU - Vigan, A.

AU - Warner, B.

AU - Witasse, O.

AU - Yang, B.

AU - Asphaug, E.

AU - Richardson, D. C.

AU - Ševeček, P.

AU - Gillon, M.

AU - Benkhaldoun, Z.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Context. The vast majority of the geophysical and geological constraints (e.g., internal structure, cratering history) for main-belt asteroids have so far been obtained via dedicated interplanetary missions (e.g., ESA Rosetta, NASA Dawn). The high angular resolution of SPHERE/ZIMPOL, the new-generation visible adaptive-optics camera at ESO VLT, implies that these science objectives can now be investigated from the ground for a large fraction of D 100 km main-belt asteroids. The sharp images acquired by this instrument can be used to accurately constrain the shape and thus volume of these bodies (hence density when combined with mass estimates) and to characterize the distribution and topography of D 30 km craters across their surfaces. Aims. Here, via several complementary approaches, we evaluated the recently proposed hypothesis that the S-type asteroid (89) Julia is the parent body of a small compact asteroid family that formed via a cratering collisional event. Methods. We observed (89) Julia with VLT/SPHERE/ZIMPOL throughout its rotation, derived its 3D shape, and performed a reconnaissance and characterization of the largest craters. We also performed numerical simulations to first confirm the existence of the Julia family and to determine its age and the size of the impact crater at its origin. Finally, we utilized the images/3D shape in an attempt to identify the origin location of the small collisional family. Results. On the one hand, our VLT/SPHERE observations reveal the presence of a large crater (D 75 km) in Julias southern hemisphere. On the other hand, our numerical simulations suggest that (89) Julia was impacted 30-120 Myrs ago by a D 8 km asteroid, thereby creating a D 60 km impact crater at the surface of Julia. Given the small size of the impactor, the obliquity of Julia and the particular orientation of the family in the (a,i) space, the imaged impact crater is likely to be the origin of the family. Conclusions. New doors into ground-based asteroid exploration, namely, geophysics and geology, are being opened thanks to the unique capabilities of VLT/SPHERE. Also, the present work may represent the beginning of a new era of asteroid-family studies. In the fields of geophysics, geology, and asteroid family studies, the future will only get brighter with the forthcoming arrival of 30-40 m class telescopes like ELT, TMT, and GMT.

AB - Context. The vast majority of the geophysical and geological constraints (e.g., internal structure, cratering history) for main-belt asteroids have so far been obtained via dedicated interplanetary missions (e.g., ESA Rosetta, NASA Dawn). The high angular resolution of SPHERE/ZIMPOL, the new-generation visible adaptive-optics camera at ESO VLT, implies that these science objectives can now be investigated from the ground for a large fraction of D 100 km main-belt asteroids. The sharp images acquired by this instrument can be used to accurately constrain the shape and thus volume of these bodies (hence density when combined with mass estimates) and to characterize the distribution and topography of D 30 km craters across their surfaces. Aims. Here, via several complementary approaches, we evaluated the recently proposed hypothesis that the S-type asteroid (89) Julia is the parent body of a small compact asteroid family that formed via a cratering collisional event. Methods. We observed (89) Julia with VLT/SPHERE/ZIMPOL throughout its rotation, derived its 3D shape, and performed a reconnaissance and characterization of the largest craters. We also performed numerical simulations to first confirm the existence of the Julia family and to determine its age and the size of the impact crater at its origin. Finally, we utilized the images/3D shape in an attempt to identify the origin location of the small collisional family. Results. On the one hand, our VLT/SPHERE observations reveal the presence of a large crater (D 75 km) in Julias southern hemisphere. On the other hand, our numerical simulations suggest that (89) Julia was impacted 30-120 Myrs ago by a D 8 km asteroid, thereby creating a D 60 km impact crater at the surface of Julia. Given the small size of the impactor, the obliquity of Julia and the particular orientation of the family in the (a,i) space, the imaged impact crater is likely to be the origin of the family. Conclusions. New doors into ground-based asteroid exploration, namely, geophysics and geology, are being opened thanks to the unique capabilities of VLT/SPHERE. Also, the present work may represent the beginning of a new era of asteroid-family studies. In the fields of geophysics, geology, and asteroid family studies, the future will only get brighter with the forthcoming arrival of 30-40 m class telescopes like ELT, TMT, and GMT.

KW - Methods: numerical

KW - Methods: observational

KW - Minor planets asteroids: individual: (89) Julia

KW - Techniques: high angular resolution

U2 - 10.1051/0004-6361/201833477

DO - 10.1051/0004-6361/201833477

M3 - Article

VL - 618

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - 33477

ER -