Results 31 to 40 of about 87 (87)

Iron(II) sulphides in cosmic dust: Optical constants depending on iron deficiency and temperature

Astronomy & Astrophysics
Context. Modelling of spectral energy distributions of protoplanetary and debris disks relies on optical constants of the dust components. Iron(II) sulphides are a very likely component of the dust in these objects, and they could influence the dust ...
Kranhold C., Sadeghi A., Harries D., Mutschke H., Vegesna S. V., Langenhorst F., Stanca S. E., Plentz J., Krüger H.   +8 more
doaj   +1 more source

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1610-1626, July 2026.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

The meteorite analogs of (65803) Didymos and implications for its origin

Astronomy & Astrophysics
Context. Identifying meteorite analogs of asteroids is key to understanding their origin and evolution, evaluating planetary defense, and exploring potential space resources.
Zhai Ruoyu, Xu Tianyi, Peng Liuming, Khalid Azeem, Li Siyuan, Shu Min, Wu Yunzhao   +6 more
doaj   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1593-1609, July 2026.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

The stellar origins of 96Zr excesses in presolar graphites from the Murchison meteorite

Astronomy & Astrophysics
Context. Zirconium-96 is a stable isotope that can be synthesized under different neutron-rich nucleosynthetic conditions. Astrophysical models predict its production to occur in various stellar environments: from low-to-intermediate-mass asymptotic ...
Pal I., Jadhav M., Shulaker D. Z., Raiwa M., Savina M. R., Bouillion H., Pignatari M., Roberti L., Lugaro M., Szányi B., Karakas A., Denissenkov P., Herwig F., Dory C. J., Gyngard F., Kita N., Amari S.   +16 more
doaj   +1 more source

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1333-1354, July 2026.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews, Auriol S. P. Rae, Thomas Kenkmann, Nicholas E. Timms, Aaron J. Cavosie, Marian B. Holness   +5 more
wiley   +1 more source

Coupling dynamical accretion and chemical differentiation: A unified framework for the diversity of Earth and Mars

Astronomy & Astrophysics
The physical and geochemical differences between Earth and Mars provide fundamental constraints on terrestrial planet formation, yet a self-consistent framework linking dynamical and chemical aspects remains elusive.
Kong Zhihui, Liu Beibei, ZhangZhou J., Tang Haolan, Deng Zhengbin, Xia Qun-Ke, Grimm Simon L., Lee Man Hoi, Huang Yi, Qin Liping, Jiang Jonathan H.   +10 more
doaj   +1 more source

Geophysical investigation of the Santa Marta impact structure—Piauí State, Brazil

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1399-1416, July 2026.
Abstract The Santa Marta impact structure in northeastern Brazil, recognized as a partially preserved complex crater, was investigated through an integrated geophysical study employing magnetotelluric (MT) and gravity methods. Our research provides constraints on the crater's subsurface architecture.
Elienara Vasconcelos, João De Oliveira, Marcos Vasconcelos, Martyn Unsworth, Andrea Santos‐Matos, Florivaldo Sena   +5 more
wiley   +1 more source

Computing phase diagrams using a convex hull algorithm

Astronomy & Astrophysics
We present a simple universal computational algorithm for computing compositional phase diagrams of rocks and their melts at a given temperature and pressure.
Dullemond C. P., Young E. D.
doaj   +1 more source

Araguainha Dome, Brazil: A polygonal impact structure due to a complex pre‐impact regional structural framework

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1355-1385, July 2026.
Abstract We investigated the structural framework of the north–northwestern Paraná Basin in Brazil to test whether the pre‐impact structures in this region may have had any influence on the first‐order formation and morphostructure of the Araguainha impact structure (AIS).
Renato B. Bernardes, Wolf U. Reimold, Roger L. Gibson, Julia B. Curto Ma, Adolfo B. Silva, Natalia Hauser   +5 more
wiley   +1 more source