Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Manavi Jadhav"'
Autor:
Rainer Wieler, Matthias M. M. Meier, Henner Busemann, Colin Maden, Heinrich Baur, Philipp R. Heck, Ernst Zinner, Frank Gyngard, Sachiko Amari, Manavi Jadhav, Teruyuki Maruoka
Publikováno v:
Meteoritics & Planetary Science. 53:2327-2342
We present He and Ne isotopes of individual presolar graphite grains from a low-density separate from Orgueil. Two grain mounts were analyzed with the same techniques but in a different sequence: The first one was measured with NanoSIMS followed by n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7b581cfbf24a5864ed8132f45995212
https://doi.org/10.1111/maps.13129
https://doi.org/10.1111/maps.13129
Autor:
Reto Trappitsch, Peter Hoppe, Manavi Jadhav, Nicolas Dauphas, Christopher H. Kelly, Frank Gyngard, Detlef Rost, Thomas Stephan, Michael J. Pellin, Andrew M. Davis, Michael R. Savina
Publikováno v:
Geochimica et Cosmochimica Acta. 221:109-126
We used CHILI, the Chicago Instrument for Laser Ionization, a new resonance ionization mass spectrometer developed for isotopic analysis of small samples, to analyze strontium, zirconium, and barium isotopes in 22 presolar silicon carbide grains. Twe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91acf38ba4755c768253f596ec8243e5
https://doi.org/10.1016/j.gca.2017.05.001
https://doi.org/10.1016/j.gca.2017.05.001
Publikováno v:
Geochimica et Cosmochimica Acta. 221:60-86
We report the morphology, microstructure, and isotopic composition of the largest SiC stardust grain known to have condensed from a supernova. The 25-μm diameter grain, termed Bonanza, was found in an acid-resistant residue of the Murchison meteorit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::993243d519caebc0fb2d6a61d755cdbc
https://doi.org/10.1016/j.gca.2017.09.002
https://doi.org/10.1016/j.gca.2017.09.002
Publikováno v:
Geological Society of America Abstracts with Programs.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0aa94ca5a6934a1906165f40defc22c4
https://doi.org/10.1130/abs/2018am-324814
https://doi.org/10.1130/abs/2018am-324814
Autor:
Kuljeet K. Marhas, Sachiko Amari, Teruyuki Maruoka, Ernst Zinner, Manavi Jadhav, Roberto Gallino
Publikováno v:
Geochimica et Cosmochimica Acta. 113:193-224
We report C, N, O, Si, Al–Mg, K, Ca, and Ti isotopic analyses of presolar graphite grains from the Orgueil CI chondrite. NanoSIMS isotopic measurements were made on 345 grains from seven density fractions, with grain sizes >1 lm: low-density grains
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2318744ba14f330927bef3afee6cc741
https://doi.org/10.1016/j.gca.2013.01.018
https://doi.org/10.1016/j.gca.2013.01.018
Publikováno v:
Meteoritics & Planetary Science. 48:686-699
Transmission electron microscope (TEM) investigations have revealed Os, Ru, Mo-rich refractory metal nuggets within four different presolar graphites, from both the high-density (HD) Murchison (MUR) and low-density (LD) Orgueil (ORG) fractions. Micro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74299889953c8c7ac5de272c069fe46d
https://doi.org/10.1111/maps.12093
https://doi.org/10.1111/maps.12093
Autor:
Roberto Gallino, Teruyuki Maruoka, Ernst Zinner, Manavi Jadhav, Sachiko Amari, Kuljeet K. Marhas
Publikováno v:
The Astrophysical Journal. 682:1479-1485
WepresentC,N,O,Si,Al-Mg,K,Ca,andTiisotopicanalyses ofsevenhigh-density(ORG1f, � � 2:02 2:04 gcm � 3 ) graphite grains from Orgueil with 12 C/ 13 C ratios smaller than 20. The presence of 44Ti in three of these grains indicates an origin in Type
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a063ea72fa36b915860746103373362a
https://doi.org/10.1086/589139
https://doi.org/10.1086/589139
Publikováno v:
Proceedings of XIII Nuclei in the Cosmos — PoS(NIC XIII).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4676c411806f5e89bce4b12067795023
https://doi.org/10.22323/1.204.0004
https://doi.org/10.22323/1.204.0004
Publikováno v:
New Astronomy Reviews. 50:591-595
We report the successful isolation and isotopic analysis of presolar graphite grains from the Orgueil CI chondrite. Isotopic measurements were made on seven density fractions, with grain sizes >1 μm: ORG1b (1.59–1.67 g cm −3 ), 1c (1.67–1.75 g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d50131e2b2dbf784571fad64dae2b3f
https://doi.org/10.1016/j.newar.2006.06.004
https://doi.org/10.1016/j.newar.2006.06.004
Publikováno v:
ASTROPHYSICAL JOURNAL LETTERS
ApJ Letters
ApJ Letters
Graphite is one of the many presolar circumstellar condensate species found in primitive meteorites. While the isotopic compositions of low-density graphite grains indicate an origin in core-collapse supernovae, some high-density grains have extreme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e14190504d4c9b6aa44f3b3721b8e73a
http://arxiv.org/abs/1310.2679
http://arxiv.org/abs/1310.2679
