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Anton I. Ermakov
Researcher at University of California, Berkeley
Publications - 73
Citations - 2074
Anton I. Ermakov is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Impact crater & Dwarf planet. The author has an hindex of 21, co-authored 66 publications receiving 1544 citations. Previous affiliations of Anton I. Ermakov include California Institute of Technology & Lowell Observatory.
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Journal ArticleDOI
Dawn Arrives at Ceres: Exploration of a Small Volatile-Rich World
Christopher T. Russell,Carol A. Raymond,Eleonora Ammannito,Debra Buczkowski,M. C. De Sanctis,Harald Hiesinger,Ralf Jaumann,Alex S. Konopliv,Harry Y. McSween,Andreas Nathues,Ryan S. Park,Carle M. Pieters,Thomas H. Prettyman,T. B. McCord,Lucy A. McFadden,Stefano Mottola,Maria T. Zuber,Steve Joy,Carol A. Polanskey,Marc D. Rayman,Julie Castillo-Rogez,Peter Chi,J. P. Combe,Anton I. Ermakov,Roger R. Fu,Michael J. Hoffmann,Y. D. Jia,Scott D. King,David J. Lawrence,Jian-Yang Li,Simone Marchi,Frank Preusker,T. Roatsch,Ottaviano Ruesch,Paul M. Schenk,Michaela Villarreal,Naoyuki Yamashita +36 more
TL;DR: C Ceres’ dry exterior displays hydroxylated silicates, including ammoniated clays of endogenous origin, which suggest a mechanically strong lithosphere with a weaker deep interior.
Journal ArticleDOI
A partially differentiated interior for (1) Ceres deduced from its gravity field and shape
Ryan S. Park,Alex S. Konopliv,Bruce G. Bills,Nicolas Rambaux,Julie Castillo-Rogez,Carol A. Raymond,Andrew T. Vaughan,Anton I. Ermakov,Maria T. Zuber,Roger R. Fu,Michael J. Toplis,Christopher T. Russell,Andreas Nathues,Frank Preusker +13 more
TL;DR: Gravity and shape measurements obtained from the Dawn spacecraft show that Ceres is a partially differentiated body, with a rocky core overlaid by a volatile-rich shell, as predicted in some studies, and show that the gravity signal is strongly suppressed compared to that predicted by the topographic variation.
Journal ArticleDOI
Cratering on Ceres: Implications for its crust and evolution
Harald Hiesinger,Simone Marchi,Nico Schmedemann,Paul M. Schenk,Jan Hendrik Pasckert,Adrian Neesemann,David P. O'Brien,Thomas Kneissl,Anton I. Ermakov,Roger R. Fu,Michael T. Bland,Andreas Nathues,Thomas Platz,David A. Williams,Ralf Jaumann,Ralf Jaumann,Julie Castillo-Rogez,Ottaviano Ruesch,Britney E. Schmidt,Ryan S. Park,Frank Preusker,Debra Buczkowski,Christopher T. Russell,Carol A. Raymond +23 more
TL;DR: Crater morphology and the simple-to-complex crater transition indicate that Ceres’ outer shell is likely neither pure ice nor pure rock but an ice-rock mixture that allows for limited relaxation.
Journal ArticleDOI
The interior structure of Ceres as revealed by surface topography
Roger R. Fu,Roger R. Fu,Anton I. Ermakov,Simone Marchi,Julie Castillo-Rogez,Carol A. Raymond,Bradford H. Hager,Maria T. Zuber,Scott D. King,Michael T. Bland,Maria Cristina De Sanctis,Frank Preusker,Ryan S. Park,Christopher T. Russell +13 more
TL;DR: In this paper, the authors present finite element (FE) geodynamical simulations of Ceres to identify the internal structures and compositions that best reproduce its topography as observed by the NASA Dawn mission.
Journal ArticleDOI
Constraints on Ceres' Internal Structure and Evolution From Its Shape and Gravity Measured by the Dawn Spacecraft
Anton I. Ermakov,Anton I. Ermakov,Roger R. Fu,Julie Castillo-Rogez,Carol A. Raymond,Ryan S. Park,Frank Preusker,Christopher T. Russell,David E. Smith,David E. Smith,Maria T. Zuber +10 more
TL;DR: In this paper, a negative correlation and admittance between topography and gravity at degree 2 and order 2 are well explained by Airy isostatic compensation mechanism, while the gravity field has been globally determined to a spherical harmonic degree 14 (equivalent to a spatial wavelength of 211 km) and locally to 18 (a wavelength of 164 km).