Micro- and nanoscale studies of insoluble organic matter and C-rich presolar grains in Murchison and Sutter’s Mill in preparation for Bennu sample analysisOPEN ACCESS
A. N. Nguyen, S. J. Clemett, K. Thomas-Keprta, C. M. O’D. Alexander, D. P. Glavin, J. P. Dworkin, H. C. Connolly Jr, D. S. Lauretta MAPS, Version of Record online: 30 August 2024 LINK (OPEN…
Isotope studies of presolar silicon carbide grains from supernovae: new constraints for hydrogen-ingestion supernova modelsOPEN ACCESS
Peter Hoppe, Jan Leitner, Marco Pignatari, and Sachiko Amari Monthly Notices of the Royal Astronomical Society, stae1523Published: 19 June 2024 LINK (OPEN ACCESS) “We report isotope data for C, N, Al, Si, and S of…
Snapshots of an Evolving Solar Nebula Recorded in Nucleosynthetic Sr and Ba Signatures of Early CondensatesOPEN ACCESS
R. T. C. Marqueze, B. L. A. Charlier, and F. L. H. Tissot The Astrophysical Journal Letters, Volume 961, Number 1 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “The discovery of extreme strontium isotope anomalies (μ84Sr) in…
Explosive Nucleosynthesis in Core-collapse Type II Supernovae: Insights from New C, N, Si, and Al–Mg Isotopic Compositions of Presolar GrainsOPEN ACCESS
Nan Liu, Conel M. O’D. Alexander, Bradley S. Meyer, Larry R. Nittler, Jianhua Wang, and Rhonda M. Stroud The Astrophysical Journal Letters, Volume 961, Number 1 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “We report C, N,…
Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid RyuguOPEN ACCESS
Ann. N. Nguyen, Prajkta Mane, Lindsay P. Keller, Laurette Piani, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi,Nicolas…
New Constraints for Supernova Models from Presolar Silicon Carbide X Grains with Very High 26Al/27Al RatiosOPEN ACCESS
Peter Hoppe, Jan Leitner, Marco Pignatari, and Sachiko Amari The Astrophysical Journal Letters, Volume 943, Number 2 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “We report C, N, Mg-Al, Si, and S isotope data of six 1–3μm-sized…
Isotopic ratios for C, N, Si, Al, and Ti in C-rich presolar grains from massive stars
Jordan Schofield, Marco Pignatari, Richard J Stancliffe, Peter Hoppe Monthly Notices of the Royal Astronomical Society, stac2498Published: 08 September 2022 LINK “Certain types of silicon carbide (SiC) grains, e.g. SiC-X grains, and low density (LD)…
Presolar O- and C-anomalous grains in unequilibrated ordinary chondrite matricesOPEN ACCESS
Jens Barosch, Larry R. Nittler, Jianhua Wang, Elena Dobrică, Adrian J. Brearley, Dominik C. Hezel, Conel M. O’D. Alexander Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 29 August 2022 LINK PDF (OPEN ACCESS)…
Slow Neutron-Capture Process: Low-Mass Asymptotic Giant Branch Stars and Presolar Silicon Carbide GrainsOPEN ACCESS
Nan Liu, Sergio Cristallo, Diego Vescovi Universe 2022, 8(7), 362Review, Published: 30 June 2022 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of ancient…
TEM analyses of in situ presolar grains from unequilibrated ordinary chondrite LL3.0 SemarkonaOPEN ACCESS
Sheryl A. Singerling, Larry R. Nittler, Jens Barosch, Elena Dobrica, Adrian J. Brearley, Rhonda M. Stroud Accepted for publication in Geochimica et Cosmochimica Acta on May 5, 2022 PDF (OPEN ACCESS) Update (11 May 2022):…
Evaluation of the classification of presolar silicon carbide grains using consensus clustering with resampling methods: an assessment of the confidence of grain assignments
Grethe Hystad, Asmaa Boujibar, Nan Liu, Larry R Nittler, Robert M Hazen Monthly Notices of the Royal Astronomical Society, stab3478Published: 03 December 2021 LINK “We report the use of several cluster analysis techniques to evaluate…
Presolar Grain Isotopic Ratios as Constraints to Nuclear and Stellar Parameters of Asymptotic Giant Branch Star Nucleosynthesis
Sara Palmerini, Maurizio Busso, Diego Vescovi, Eugenia Naselli, Angelo Pidatella, Riccardo Mucciola, Sergio Cristallo, David Mascali, Alberto Mengoni, Stefano Simonucci et al The Astrophysical Journal, Volume 921, Number 1 LINK “Recent models for evolved low-mass…
New Multielement Isotopic Compositions of Presolar SiC Grains: Implications for Their Stellar Origins
Nan Liu, Jens Barosch, Larry R. Nittler, Conel M. O’D. Alexander, Jianhua Wang, Sergio Cristallo, Maurizio Busso, and Sara Palmerini The Astrophysical Journal Letters, Volume 920, Number 1 LINK “We report NanoSIMS Si and Mg–Al…
TEM Analyses of Unusual Presolar Silicon Carbide: Insights into the Range of Circumstellar Dust Condensation ConditionsOPEN ACCESS
S. A. Singerling, N. Liu, L. R. Nittler, C. M. O’D. Alexander, and R. M. Stroud The Astrophysical Journal, Volume 913, Number 2Published: 27 May 2021 LINK Update (31 May 2021): PDF (OPEN ACCESS)63 pages,…
Initial 244Pu/238U Ratios and Search for Presolar SiC in CAIs Inferred from Noble Gas and Trace Element Abundances in CAIs from CV3 Chondrites
D. Nakashima, Friedrich J. M., Ott U. 52nd Lunar and Planetary Science Conference (2021), Abstract #1944 PDF “The Pu/U ratio estimated from noble gas and REE abundances in the five CV3 CAIs is consistent with…
Presolar stardust in highly pristine CM chondrites Asuka 12169 and Asuka 12236OPEN ACCESS
Larry R. Nittler, Conel M. O’D. Alexander, Andrea Patzer, Maximilien J. Verdier‐Paoletti Meteoritics & Planetary ScienceVersion of Record online: 18 January 2021 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “We report a NanoSIMS search for presolar grains…
Presolar Stardust in Highly Pristine CM Chondrites Asuka 12169 and Asuka 12236OPEN ACCESS
Larry R. Nittler, Conel M. O’D. Alexander, Andrea Patzer, Maximilien J. Verdier-Paoletti Accepted for publication in Meteoritics and Planetary Science PDF (OPEN ACCESS) “We report a NanoSIMS search for presolar grains in the CM chondrites…
Origin of Large Meteoritic SiC Stardust Grains in Metal-rich AGB Stars
Maria Lugaro, Borbála Cseh, Blanka Világos, Amanda I. Karakas, Paolo Ventura, Flavia Dell’Agli, Reto Trappitsch, Melanie Hampel, Valentina D’Orazi, Claudio B. Pereira, Giuseppe Tagliente, Gyula M. Szabó, Marco Pignatari, Umberto Battino, Ashley Tattersall, Mattias Ek,…
Evidence of presolar SiC in the Allende Curious Marie calcium–aluminium-rich inclusionOPEN ACCESS
O. Pravdivtseva, F. L. H. Tissot, N. Dauphas & S. Amari Nature Astronomy , 1–8 LINK PDF (OPEN ACCESS) “Calcium–aluminium-rich inclusions (CAIs) are one of the first solids to have condensed in the solar nebula,…
Lifetimes of interstellar dust from cosmic ray exposure ages of presolar silicon carbideOPEN ACCESS
Philipp R. Heck, Jennika Greer, Levke Kööp, Reto Trappitsch, Frank Gyngard, Henner Busemann, Colin Maden, Janaína N. Ávila, Andrew M. Davis, and Rainer Wieler PNAS, first published January 13, 2020 LINK (OPEN ACCESS) PDF (OPEN…
Isotopic Signatures of Supernova Nucleosynthesis in Presolar Silicon Carbide Grains of Type AB with Supersolar 14N/15N Ratios
Peter Hoppe, Richard J. Stancliffe, Marco Pignatari, and Sachiko Amari The Astrophysical Journal, Volume 887, Number 1 LINK “We report high-resolution C, N, Al, Si, and S isotope data of 38 presolar SiC grains of…
The presolar grain inventory of fine‐grained chondrule rims in the Mighei‐type (CM) chondritesOPEN ACCESS
Jan Leitner, Knut Metzler, Christian Vollmer, Christine Floss, Pierre Haenecour, János Kodolányi, Dennis Harries, Peter Hoppe Meteoritics & Planetary Science LINK (OPEN ACCESS) PDF (OPEN ACCESS) “We investigated the inventory of presolar silicate, oxide, and…
Formation of Interstellar C60 from Silicon Carbide Circumstellar Grains
J. J. Bernal, P. Haenecour, J. Howe, T. J. Zega, S. Amari, and L. M. Ziurys The Astrophysical Journal Letters, Volume 883, Number 2 LINK “We have conducted laboratory experiments with analog crystalline silicon carbide…
Dy, Er, and Yb isotope compositions of meteorites and their components: Constraints on presolar carriers of the rare earth elementsOPEN ACCESS
Quinn R. Shollenberger, Gregory A. Brennecka Earth and Planetary Science Letters Volume 529, 1 January 2020, 115866 LINK (OPEN ACCESS) “Highlights • We present new methods to measure Dy isotopes by MC-ICPMS. • Bulk meteorites…
Presolar Grains in Primitive Ungrouped Carbonaceous Chondrite Northwest Africa 5958OPEN ACCESS
Larry R. Nittler, Rhonda M. Stroud, Conel M. O’D. Alexander, Kaitlin Howell Accepted in Meteoritics and Planetary Science PDF (OPEN ACCESS) LINK “We report a correlated NanoSIMS-transmission electron microscopy study of the ungrouped carbonaceous chondrite…
Effects of aqueous alteration on primordial noble gases and presolar SiC in the carbonaceous chondrite Tagish Lake
M. E. I. Riebe, H. Busemann, C. M. O’D. Alexander, L. R. Nittler, C. D. K. Herd, C. Maden, J. Wang, R. Wieler Meteoritics & Planetary Science First Published: 4 September 2019 LINK “Effects of…
Presolar Silicon Carbide Grains of Types Y and Z: Their Molybdenum Isotopic Compositions and Stellar OriginsOPEN ACCESS
Nan Liu, Thomas Stephan, Sergio Cristallo, Roberto Gallino, Patrick Boehnke, Larry R. Nittler, Conel M. O.’D. Alexander, Andrew M. Davis, Reto Trappitsch, Michael J. Pellin, Iris Dillmann The Astrophysical Journal (Accepted) PDF (OPEN ACCESS) Update…
Molybdenum Isotopes in Presolar Silicon Carbide Grains: Details of s-process Nucleosynthesis in Parent Stars and Implications for r- and p-processes
Thomas Stephan, Reto Trappitsch, Peter Hoppe, Andrew M. Davis, Michael J. Pellin, and Olivia S. Pardo The Astrophysical Journal, Volume 877, Number 2 LINK “We have analyzed molybdenum isotopes, together with strontium and barium isotopes,…
Condensation of SiC Stardust in CO Nova OutburstsOPEN ACCESS
Maitrayee Bose, Sumner Starrfield Accepted in the Astrophysical Journal PDF (OPEN ACCESS) Update (27 February 2019): LINK “This study on presolar grains compares high-precision isotopic compositions of individual SiC grains with low 12C/13C ratios, low…
Structural Investigation of Silicon Carbide X Grains: Constraints on Condensation in Supernova Ejecta
János Kodolány, Christian Vollmer, Peter Hoppe, and Maren Müller The Astrophysical Journal Volume 868, Number 1 LINK “We analyzed seven presolar SiC grains of supernova origin (average diameter: 1–2 μm) with transmission electron microscopy. Five…
Coordinated EDX and micro-Raman analysis of presolar silicon carbide: A novel, nondestructive method to identify rare subgroup SiC
Replaced (7 August 2020) by: Coordinated EDX and micro‐Raman analysis of presolar silicon carbide: A novel, nondestructive method to identify rare subgroup SiC Nan Liu, Andrew Steele, Larry R. Nittler, Rhonda M. Stroud, Bradley T….
Correlated silicon and titanium isotopic compositions of presolar sic grains from the Murchison CM2 chondrite
Frank Gyngard, Sachiko Amari, Ernst Zinner, Kuljeet Kaur Marhas Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 23 September 2017 LINK “We report correlated Si, and Ti isotopic compositions and elemental concentrations of…
Bonanza: An extremely large dust grain from a supernova
Frank Gyngard, Manavi Jadhav, Larry R. Nittler, Rhonda M. Stroud, Ernst Zinner Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 7 September 2017 LINK “We report the morphology, microstructure, and isotopic composition of…
J-type carbon stars: A dominant source of 14N-rich presolar SiC grains of type ABOPEN ACCESS
Nan Liu, Thomas Stephan, Patrick Boehnke, Larry R. Nittler, Conel M. O’D. Alexander, Jianhua Wang, Andrew M. Davis, Reto Trappitsch, Michael J. Pellin The Astrophysical Journal Letters PDF (OPEN ACCESS) updated: 22 July 2017 LINK…
The neutron capture process in the He shell in core-collapse supernovae: Presolar silicon carbide grains as a diagnostic tool for nuclear astrophysics
Marco Pignatari, Peter Hoppe, Reto Trappitsch, Chris Fryer, F.X. Timmes, Falk Herwig, Raphael Hirschi Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 8 June 2017 LINK “Carbon-rich presolar grains are found in primitive…
Do meteoritic silicon carbide grains originate from asymptotic giant branch stars of super-solar metallicity?
Maria Lugaro, Amanda I. Karakas, Mária Pető, Emese Plachy Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 8 June 2017 LINK “We compare literature data for the isotopic ratios of Zr, Sr, and…
Simultaneous iron and nickel isotopic analyses of presolar silicon carbide grains
Reto Trappitsch, Thomas Stephan, Michael R. Savina, Andrew M. Davis, Michael J. Pellin, Detlef Rost, Frank Gyngard, Roberto Gallino, Sara Bisterzo, Sergio Cristallo, Nicolas Dauphas Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online…
Iron and nickel isotope compositions of presolar silicon carbide grains from supernovae
János Kodolányi, Thomas Stephan, Reto Trappitsch, Peter Hoppe, Marco Pignatari, Andrew M. Davis, Michael J. Pellin Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 29 May 2017 LINK “We report the carbon, silicon,…
Rare Earth Element abundances in presolar SiC
T.R. Ireland, J.N. Ávila, M. Lugaro, S. Cristallo, P. Holden, P. Lanc, L. Nittler, C.M.O’D. Alexander, F. Gyngard, S. Amari Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 29 May 2017 LINK “Individual…
Stellar origin of 15N-rich presolar SiC grains of type AB: supernovae with explosive hydrogen burningOPEN ACCESS
Nan Liu, Larry R. Nittler, Marco Pignatari, Conel M. O’D. Alexander, Jianhua Wang The Astrophysical Journal Letters PDF (OPEN ACCESS) “We report C, N, and Si isotopic data for 59 highly 13C-enriched presolar submicron- to…
Osmium isotopic homogeneity in the CK carbonaceous chondrites
Steven Goderis, Alan D. Brandon, Bernhard Mayer, Munir Humayun Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 18 May 2017 LINK “Variable proportions of isotopically diverse presolar components are known to account for…
Titanium isotopic compositions of rare presolar SiC grain types from the Murchison meteorite
Ann N. Nguyen, Larry R. Nittler, Conel M.O’D. Alexander, Peter Hoppe Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 27 February 2017 LINK “We report the Ti isotopic compositions of 8 mainstream, 22…
NanoSIMS Isotope Studies of Rare Types of Presolar Silicon Carbide Grains from the Murchison Meteorite: Implications for Supernova Models and the Role of 14C
Peter Hoppe, Marco Pignatari, János Kodolányi, Elmar Gröner, Sachiko Amari Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 9 February 2017 LINK “We have conducted a NanoSIMS ion imaging survey of about 1800…
Revisiting the lifetime estimate of large presolar grains in the interstellar medium
Hiroyuki Hirashita, Takaya Nozawa, Ryosuke S. Asano, Typhoon Lee Planetary and Space Science In Press, Accepted Manuscript, Available online 22 February 2016 doi:10.1016/j.pss.2016.02.006 updated (Feb. 24) PDF (OPEN ACCESS) LINK “Some very large View the…
Intrinsic W nucleosynthetic isotope variations in carbonaceous chondrites: Implications for W nucleosynthesis and nebular vs. parent body processing of presolar materials
Christoph Burkhardt, Maria Schönbächler Icarus In Press, Accepted Manuscript, Available online 20 June 2015 LINK
Cosmogenic Production Rates in Presolar SiC Grains
Trappitsch R. * Leya I. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5068 abstract (PDF)
Sulfur in presolar silicon carbide grains from asymptotic giant branch stars
Hoppe, P., Lodders, K. and Fujiya, W. (2015) Meteoritics & Planetary Science. doi: 10.1111/maps.12449 LINK
Presolar materials and isotope anomalies in the unique carbonaceous chondrite Miller Range 07687
J. Davidson, L. R. Nittler, and C. M. O’D. Alexander. Goldschmidt 2014, Abstract #503 LINK
Petrography, stable isotope compositions, microRaman spectroscopy, and presolar components of Roberts Massif 04133: A reduced CV3 carbonaceous chondrite
Davidson, J., Schrader, D. L., Alexander, C. M. O’D., Lauretta, D. S., Busemann, H., Franchi, I. A., Greenwood, R. C., Connolly, H. C., Domanik, K. J. and Verchovsky, A. Meteoritics & Planetary Science. doi: 10.1111/maps.12377…
