Evidence for early impact on a hot differentiated planetesimal from Al-rich micro-inclusions in ungrouped achondrite Northwest Africa 7325
Jing Yang, Chi Zhang, Masaaki Miyahara, Xu Tang, Lixin Gu, Yangting Lin Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 13 March 2019 LINK “The ungrouped achondrite NWA 7325 is a cumulate olivine…
Fates of hydrous materials during planetesimal collisionsOPEN ACCESS
Shigeru Wakita, Hidenori Genda PDF (OPEN ACCESS) Update (Icarus, 20 March 2019) LINK “Hydrous minerals are found on the surfaces of asteroids, but their origin is not clear. If their origin is endogenic, the hydrous…
Accretion of the asteroids: Implications for their thermal evolution
S. J. Weidenschilling Meteoritics & Planetary Science First Published: 3 March 2019 LINK “Thermal models of asteroids generally assume that they accreted either instantaneously or over an extended interval with a prescribed growth rate. It…
Meteorite cloudy zone formation as a quantitative indicator of paleomagnetic field intensities and cooling rates on planetesimalsOPEN ACCESS
Clara Maurel, Benjamin P. Weiss, James F. J. Bryson PDF (OPEN ACCESS) “Metallic microstructures in slowly-cooled iron-rich meteorites reflect the thermal and magnetic histories of their parent planetesimals. Of particular interest is the cloudy zone,…
Near-equilibrium isotope fractionation during planetesimal evaporation
E.D. Young, A. Shahar, F. Nimmo, H.E. Schlichting, E.A. Schauble, H. Tang, J. Labidi Icarus Available online 21 January 2019 LINK “Highlights • Silicon and Mg in differentiated rocky bodies exhibit heavy isotope enrichments that…
On the principle building blocks of Mars and Earth
Christian Liebske, Amir Khan IcarusAvailable online 20 January 2019 LINK “Highlights • Stochastic mixing of chondrites and achondrites to reconcile isotopic signatures for Mars and Earth indicate highly non-unique solution spaces • Complementary geophysical and…
Magma ascent in planetesimals: Control by grain size
Tim Lichtenberg, Tobias Keller, Richard F.Katz, Gregor J. Golabek, Taras V. Gerya Earth and Planetary Science Letters Volume 507, 1 February 2019, Pages 154-165 LINK “Highlights • Planetesimal melt transport regimes from coupled models of…
Iron Isotope Constraints on Planetesimal Core Formation in the Early Solar System
Michelle K. Jordan, HaoLan Tang, Issaku E. Kohl, Edward D. Young Geochimica et Cosmochimica Acta LINK “We determined the Fe isotope fractionation between the metal and silicate phases of two aubrite meteorites, Norton County and…
Olivine grain growth in partially molten Fe–Ni–S: A proxy for the genesis of pallasite meteorites
Giulio F.D. Solferino, Gregor J. Golabek Earth and Planetary Science Letters Volume 504, 15 December 2018, Pages 38-52 LINK “Highlights • Olivine grain growth in metal matrix is faster when metal is partially molten. •…
Meteoritic Abundances of Fatty Acids and Potential Reaction Pathways in PlanetesimalsOPEN ACCESS
James C.-Y. Lai, Ben K. D. Pearce, Ralph E. Pudritz, Drake Lee accepted for publication in Icarus PDF (OPEN ACCESS) “The origin of fatty acids on the prebiotic Earth is important as they likely formed…
The formation of Jupiter by hybrid pebble–planetesimal accretionOPEN ACCESS
Yann Alibert, Julia Venturini, Ravit Helled, Sareh Ataiee, Remo Burn, Luc Senecal, Willy Benz, Lucio Mayer, Christoph Mordasini, Sascha P. Quanz & Maria Schönbächler Nature Astronomy (2018) PDF (OPEN ACCESS) LINK “The standard model for…
Silica-rich volcanism in the early solar system dated at 4.565 GaOPEN ACCESS
Poorna Srinivasan, Daniel R. Dunlap, Carl B. Agee, Meenakshi Wadhwa, Daniel Coleff, Karen Ziegler, Ryan Zeigler & Francis M. McCubbin Nature Communications 9, 3036 Published: 02 August 2018 LINK (OPEN ACCESS) PDF (OPEN ACCESS) Abstract…
The common origin of family and non-family asteroids
Stanley F. Dermott, Apostolos A. Christou, Dan Li, Thomas. J. J. Kehoe & J. Malcolm Robinson Nature Astronomy (2018) LINK “All asteroids are currently classified as either family, originating from the disruption of known bodies1,…
Thermal evolution and sintering of chondritic planetesimals IV. Temperature dependence of heat conductivity of asteroids and meteoritesOPEN ACCESS
Hans-Peter Gail, Mario Trieloff Update (30 July 2018):LINK PDF (OPEN ACCESS) “Understanding the compaction and differentiation of the planetesimals and protoplanets from the Asteroid Belt and the terrestrial planet region of the Solar System requires…
Multi‐stage core formation in planetesimals revealed by numerical modeling and Hf‐W chronometry of iron meteorites
W. Neumann, T. S. Kruijer, D. Breuer, T. Kleine J. Geophys. Res., 123, doi:10.1002/2017JE005411 LINK “Iron meteorites provide some of the most direct insights into the processes and timescales of core formation in planetesimals. Of…
Percolative core formation in planetesimals enabled by hysteresis in metal connectivity
Soheil Ghanbarzadeh, Marc A. Hesse, and Maša Prodanović PNAS 2017 ; published ahead of print December 4, 2017 doi: 10.1073/pnas.1707580114 LINK “Significance It has long been thought that percolative core formation is prevented by high…
Heterogeneous delivery of silicate and metal to the Earth by large planetesimalsOPEN ACCESS
S. Marchi, R. M. Canup & R. J. Walker Nature Geoscience (2017) doi:10.1038/s41561-017-0022-3 Published online: 04 December 2017 LINK (OPEN ACCESS) “After the Moon’s formation, Earth experienced a protracted bombardment by leftover planetesimals. The mass…
Impact splash chondrule formation during planetesimal recyclingOPEN ACCESS
Tim Lichtenberg, Gregor J. Golabek, Cornelis P. Dullemond, Maria Schönbächler, Taras V. Gerya, Michael R. Meyer accepted for publication in Icarus associated blog article (6 Nov 2017) PDF (OPEN ACCESS) “Chondrules are the dominant bulk…
Spatial distribution of carbon dust in the early solar nebula and the carbon content of planetesimalsOPEN ACCESS
Hans-Peter Gail, Mario Trieloff A&A Volume 606, October 2017 LINK (OPEN ACCESS) “Context. A high fraction of carbon bound in solid carbonaceous material is observed to exist in bodies formed in the cold outskirts of…
The empty primordial asteroid beltOPEN ACCESS
Sean N. Raymond, Andre Izidoro Science Advances 13 Sep 2017: Vol. 3, no. 9, e1701138 DOI: 10.1126/sciadv.1701138 LINK (OPEN ACCESS) PDF (OPEN ACCESS) PDF (OPEN ACCESS) (authors’ version) Blog post by S.N. Raymond “The asteroid…
Identification of a primordial asteroid family constrains the original planetesimal population
Marco Delbo, Kevin Walsh, Bryce Bolin, Chrysa Avdellidou, Alessandro Morbidelli Science 08 Sep 2017: Vol. 357, Issue 6355, pp. 1026-1029 DOI: 10.1126/science.aam6036 LINK “A quarter of known asteroids is associated with more than 100 distinct…
Ejection of Chondrules from Fluffy MatricesOPEN ACCESS
Sota Arakawa Accepted for publication in ApJ Draft version PDF (OPEN ACCESS) update (8 September 2017): LINK The Astrophysical Journal Volume 846, Number 2 “Chondritic meteorites primarily contain millimeter-sized spherical objects, the so-called chondrules; however,…
The spatial distribution of carbon dust in the early solar nebula and the carbon content of planetesimalsOPEN ACCESS
Hans-Peter Gail, Mario Trieloff accepted by Astronomy & Astrophysics PDF (OPEN ACCESS) “A high fraction of carbon bound in solid carbonaceous material is observed to exist in bodies formed in the cold outskirts of the…
Redox States of Initial Atmospheres Outgassed on Rocky Planets and Planetesimals
Laura Schaefer, Bruce Fegley Jr. The Astrophysical Journal, Volume 843, Number 2 Published 2017, July 12 LINK “The Earth and other rocky planets and planetesimals in the solar system formed through the mixing of materials…
One-pot synthesis of amino acid precursors with insoluble organic matter in planetesimals with aqueous activityOPEN ACCESS
By Yoko Kebukawa, Queenie H. S. Chan, Shogo Tachibana, Kensei Kobayashi, Michael E. Zolensky Science Advances 17 Mar 2017: Vol. 3, no. 3, e1602093 DOI: 10.1126/sciadv.1602093 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “The exogenous delivery…
Chondrule Accretion with a Growing ProtoplanetOPEN ACCESS
Yuji Matsumoto, Shoichi Oshino, Yasuhiro Hasegawa, Shigeru Wakita accepted for publication in ApJ Draft version published: 28 February 2017 PDF (OPEN ACCESS) Update (8 March 2017): LINK The Astrophysical Journal, Volume 837, Number 2 “Chondrules…
Melting of C-Rich Planetesimals and Implications for the Composition of the Ureilite Parent Body
M. Collinet, T. L. Grove 48th Lunar and Planetary Science Conference (2017), Abstract #2052 LINK
Diffusion of Oxygen Isotopes in Thermally Evolving Planetesimals and Size Ranges of Presolar Silicate GrainsOPEN ACCESS
S. Wakita, T. Nozawa, Y. Hasegawa accepted for publication in ApJ PDF (OPEN ACCESS) Update (13 February 2017): LINK “Presolar grains are small particles found in meteorites through their isotopic compositions which are considerably different…
Diversity of the initial rocky planetary building materials at the edge of the solar system
Brownlee, D. E. and Joswiak, D. J. Meteoritics & Planetary Science. doi: 10.1111/maps.12804 First published: 9 December 2016 LINK “Asteroids and comets are surviving members of the vast planetesimal population that was distributed across the…
Meteorites and the RNA World: A Thermodynamic Model of Nucleobase Synthesis within PlanetesimalsOPEN ACCESS
Pearce Ben K. D. and Pudritz Ralph E. Astrobiology November 2016, 16(11): 853-872. doi:10.1089/ast.2015.1451. Online Ahead of Print: November 9, 2016 PDF (OPEN ACCESS) LINK “The possible meteorite parent body origin of Earth’s pregenetic nucleobases…
Early scattering of the solar protoplanetary disk recorded in meteoritic chondrulesOPEN ACCESS
By Yves Marrocchi, Marc Chaussidon, Laurette Piani, Guy Libourel Science Advances 01 Jul 2016: Vol. 2, no. 7, e1601001 DOI: 10.1126/sciadv.1601001 LINK (OPEN ACCESS) Supplementary Materials (PDF) “Meteoritic chondrules are submillimeter spherules representing the major…
The effects of short-lived radionuclides and porosity on the early thermo-mechanical evolution of planetesimals
Tim Lichtenberg, Gregor J. Golabek, Taras V. Gerya, Michael R. Meyer Icarus In Press, Accepted Manuscript, Available online 16 March 2016 doi:10.1016/j.icarus.2016.03.004 Updated (22 March): PDF (OPEN ACCESS) LINK “The thermal history and internal structure…
Forming Chondrites in a Solar Nebula with Magnetically Induced Turbulence
Yasuhiro Hasegawa, Neal J. Turner, Joseph Masiero, Shigeru Wakita, Yuji Matsumoto, Shoichi Oshino Updated (16 March 2016): abstract Yasuhiro Hasegawa et al 2016 ApJ 820 L12 PDF (open access) abstract “Chondritic meteorites provide valuable opportunities…
Thermal evolution and sintering of chondritic planetesimals III. Modelling the heat conductivity of porous chondrite material
Stephan Henke, Hans-Peter Gail, Mario Trieloff updated: 12 April 2016 A&A Volume 589, May 2016 Published online: 12 April 2016 DOI: http://dx.doi.org/10.1051/0004-6361/201527687 LINK PDF (open access) abstract “The construction of models for the internal constitution…
Core solidification and dynamo evolution in a mantle-stripped planetesimal
A. Scheinberg, L. T. Elkins-Tanton, G. Schubert and D. Bercovici Journal of Geophysical Research: Planets Article first published online: 5 JAN 2016 | DOI: 10.1002/2015JE004843 LINK “The physical processes active during the crystallization of a…
A New Mechanism for Chondrule Formation: Radiative Heating by Hot Planetesimals
William Herbst, James P. Greenwood Accepted Nov. 16, 2015 for publication as a Research Note in Icarus PDF (full text) abstract updated on December 10: LINK “We propose that chondrules are formed by radiative heating…
Accretion timescales and style of asteroidal differentiation in an 26Al-poor protoplanetary disk
K.K. Larsen, M. Schiller, M. Bizzarro Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 8 December 2015 doi:10.1016/j.gca.2015.10.036 LINK “The decay of radioactive 26Al to 26Mg (half-life of 730,000 years) is postulated to…
Evidence for Pebbles in Comets
K.A. Kretke, H.F. Levison Icarus In Press, Accepted Manuscript, Available online 20 August 2015 PDF (full text) abstract
Growth of asteroids, planetary embryos, and Kuiper belt objects by chondrule accretion
Anders Johansen, Mordecai-Mark Mac Low, Pedro Lacerda, Martin Bizzarro Science Advances 17 Apr 2015: Vol. 1 no. 3 e1500109 DOI: 10.1126/sciadv.1500109 PDF (full text) LINK (full text)
Early accretion of protoplanets inferred from a reduced inner solar system 26Al inventory
Martin Schiller, James N. Connelly, Aslaug C. Glad, Takashi Mikouchi, Martin Bizzarro Earth and Planetary Science Letters Volume 420, 15 June 2015, Pages 45–54 doi:10.1016/j.epsl.2015.03.028 LINK
How to form planetesimals from mm-sized chondrules and chondrule aggregates
Daniel Carrera, Anders Johansen, Melvyn B. Davies PDF LINK (full text) LINK
The multifaceted planetesimal formation process
Anders Johansen, Jürgen Blum, Hidekazu Tanaka, Chris Ormel, Martin Bizzarro, Hans Rickman Final version of chapter in Protostars and Planets VI, University of Arizona Press (2014), eds. H. Beuther, R. Klessen, C. Dullemond, Th. Henning…
How Earth was watered Recent findings have wide implications in study of extrasolar life
by Alvin Powell Harvard Gazette, 27 February 2014 LINK
The fate of magmas in planetesimals and the retention of primitive chondritic crusts
Fua RR and Elkins-Tanton LT (2014) Earth and Planetary Science Letters Volume 390, 15 March 2014, Pages 128–137 LINK High abundances of short-lived radiogenic isotopes in the early solar system led to interior melting and…
Magnetic and Nonmagnetic Differentiated Planetesimals
B. P. Weiss, R. Fu, D. L. Shuster, J. Gattacceca, C. R. Suavet, A. J. Irving Workshop on Planetesimal Formation and Differentiation (2013), Abstract #8047 PDF LINK
