Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments

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Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments. / Sanghani, Manish N.; Lajaunie, Luc; Marhas, Kuljeet Kaur; Rickard, William D. A.; Hsiao, Silver Sung-Yun; Peeters, Zan; Shang, Hsien; Lee, Der-Chuen; Calvino, Jose J.; Bizzarro, Martin.

In: The Astrophysical Journal, Vol. 925, No. 2, 110, 2022.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Sanghani, MN, Lajaunie, L, Marhas, KK, Rickard, WDA, Hsiao, SS-Y, Peeters, Z, Shang, H, Lee, D-C, Calvino, JJ & Bizzarro, M 2022, 'Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments', The Astrophysical Journal, vol. 925, no. 2, 110. https://doi.org/10.3847/1538-4357/ac3332

APA

Sanghani, M. N., Lajaunie, L., Marhas, K. K., Rickard, W. D. A., Hsiao, S. S-Y., Peeters, Z., Shang, H., Lee, D-C., Calvino, J. J., & Bizzarro, M. (2022). Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments. The Astrophysical Journal, 925(2), [110]. https://doi.org/10.3847/1538-4357/ac3332

Vancouver

Sanghani MN, Lajaunie L, Marhas KK, Rickard WDA, Hsiao SS-Y, Peeters Z et al. Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments. The Astrophysical Journal. 2022;925(2). 110. https://doi.org/10.3847/1538-4357/ac3332

Author

Sanghani, Manish N. ; Lajaunie, Luc ; Marhas, Kuljeet Kaur ; Rickard, William D. A. ; Hsiao, Silver Sung-Yun ; Peeters, Zan ; Shang, Hsien ; Lee, Der-Chuen ; Calvino, Jose J. ; Bizzarro, Martin. / Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments. In: The Astrophysical Journal. 2022 ; Vol. 925, No. 2.

Bibtex

@article{3ef9889de8394edb9ac6b69bca2ef828,
title = "Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments",
abstract = "We report the structural and chemical investigation of nine presolar silicate grains from the CH3/CB(b)3 chondrite Isheyevo and CR2 chondrite Northwest Africa (NWA) 801. Five of these grains belong to group 1, likely condensed in low- to intermediate-mass asymptotic giant branch (AGB) stars, super-AGB stars, or core-collapse supernovae, while the remaining four grains belong to group 4 and have a supernova origin. The advanced transmission electron microscopy and associated electron spectroscopy analyses show a diverse range of chemical and structural compositions for presolar silicates. Two GEMS (glass with embedded metal and sulfide)-like silicates, each from different groups, condensed under nonequilibrium conditions in stellar outflows. Two nonstoichiometric silicates from group 1 have dissimilar formation and alteration histories. An amorphous silicate from group 1 with olivine-like [(Mg,Fe)(2)SiO4] composition likely formed as a crystalline olivine that subsequently amorphized in the interstellar medium. An oldhamite (CaS) grain within a stoichiometric enstatite (MgSiO3) from group 1 probably formed by heterogeneous condensation in circumstellar outflows. Of the two crystalline grains from group 4, one is an antigorite [(Mg,Fe)(3)Si2O5(OH)(4)], while the other is a nontronite [Na,Fe-2(Si,Al)(4)O-10(OH)(2).nH(2)O], both formed as a crystalline forsterite and later altered to have hydrated silicate composition. A group-4 silicate has a chemical composition similar to a low Ca-pyroxene [(Ca,Mg)(Si,Al)(2)O-6]. Our data imply that presolar grains from different groups can have a similar range of grain-formation conditions.",
keywords = "LOSS SPECTROSCOPY EELS, CRYSTALLINE SILICATE, EVOLVED STARS, SOLAR NEIGHBORHOOD, SUPERNOVA REMNANT, MINERAL FORMATION, OXIDE GRAINS, DUST, CIRCUMSTELLAR, CONDENSATION",
author = "Sanghani, {Manish N.} and Luc Lajaunie and Marhas, {Kuljeet Kaur} and Rickard, {William D. A.} and Hsiao, {Silver Sung-Yun} and Zan Peeters and Hsien Shang and Der-Chuen Lee and Calvino, {Jose J.} and Martin Bizzarro",
year = "2022",
doi = "10.3847/1538-4357/ac3332",
language = "English",
volume = "925",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "2",

}

RIS

TY - JOUR

T1 - Microstructural and Chemical Investigations of Presolar Silicates from Diverse Stellar Environments

AU - Sanghani, Manish N.

AU - Lajaunie, Luc

AU - Marhas, Kuljeet Kaur

AU - Rickard, William D. A.

AU - Hsiao, Silver Sung-Yun

AU - Peeters, Zan

AU - Shang, Hsien

AU - Lee, Der-Chuen

AU - Calvino, Jose J.

AU - Bizzarro, Martin

PY - 2022

Y1 - 2022

N2 - We report the structural and chemical investigation of nine presolar silicate grains from the CH3/CB(b)3 chondrite Isheyevo and CR2 chondrite Northwest Africa (NWA) 801. Five of these grains belong to group 1, likely condensed in low- to intermediate-mass asymptotic giant branch (AGB) stars, super-AGB stars, or core-collapse supernovae, while the remaining four grains belong to group 4 and have a supernova origin. The advanced transmission electron microscopy and associated electron spectroscopy analyses show a diverse range of chemical and structural compositions for presolar silicates. Two GEMS (glass with embedded metal and sulfide)-like silicates, each from different groups, condensed under nonequilibrium conditions in stellar outflows. Two nonstoichiometric silicates from group 1 have dissimilar formation and alteration histories. An amorphous silicate from group 1 with olivine-like [(Mg,Fe)(2)SiO4] composition likely formed as a crystalline olivine that subsequently amorphized in the interstellar medium. An oldhamite (CaS) grain within a stoichiometric enstatite (MgSiO3) from group 1 probably formed by heterogeneous condensation in circumstellar outflows. Of the two crystalline grains from group 4, one is an antigorite [(Mg,Fe)(3)Si2O5(OH)(4)], while the other is a nontronite [Na,Fe-2(Si,Al)(4)O-10(OH)(2).nH(2)O], both formed as a crystalline forsterite and later altered to have hydrated silicate composition. A group-4 silicate has a chemical composition similar to a low Ca-pyroxene [(Ca,Mg)(Si,Al)(2)O-6]. Our data imply that presolar grains from different groups can have a similar range of grain-formation conditions.

AB - We report the structural and chemical investigation of nine presolar silicate grains from the CH3/CB(b)3 chondrite Isheyevo and CR2 chondrite Northwest Africa (NWA) 801. Five of these grains belong to group 1, likely condensed in low- to intermediate-mass asymptotic giant branch (AGB) stars, super-AGB stars, or core-collapse supernovae, while the remaining four grains belong to group 4 and have a supernova origin. The advanced transmission electron microscopy and associated electron spectroscopy analyses show a diverse range of chemical and structural compositions for presolar silicates. Two GEMS (glass with embedded metal and sulfide)-like silicates, each from different groups, condensed under nonequilibrium conditions in stellar outflows. Two nonstoichiometric silicates from group 1 have dissimilar formation and alteration histories. An amorphous silicate from group 1 with olivine-like [(Mg,Fe)(2)SiO4] composition likely formed as a crystalline olivine that subsequently amorphized in the interstellar medium. An oldhamite (CaS) grain within a stoichiometric enstatite (MgSiO3) from group 1 probably formed by heterogeneous condensation in circumstellar outflows. Of the two crystalline grains from group 4, one is an antigorite [(Mg,Fe)(3)Si2O5(OH)(4)], while the other is a nontronite [Na,Fe-2(Si,Al)(4)O-10(OH)(2).nH(2)O], both formed as a crystalline forsterite and later altered to have hydrated silicate composition. A group-4 silicate has a chemical composition similar to a low Ca-pyroxene [(Ca,Mg)(Si,Al)(2)O-6]. Our data imply that presolar grains from different groups can have a similar range of grain-formation conditions.

KW - LOSS SPECTROSCOPY EELS

KW - CRYSTALLINE SILICATE

KW - EVOLVED STARS

KW - SOLAR NEIGHBORHOOD

KW - SUPERNOVA REMNANT

KW - MINERAL FORMATION

KW - OXIDE GRAINS

KW - DUST

KW - CIRCUMSTELLAR

KW - CONDENSATION

U2 - 10.3847/1538-4357/ac3332

DO - 10.3847/1538-4357/ac3332

M3 - Journal article

VL - 925

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 110

ER -

ID: 291667922