Results 41 to 50 of about 692 (185)

Scaling K2. VI. Reduced Small-planet Occurrence in High-galactic-amplitude Stars

The Astronomical Journal, 2023
In this study, we performed a homogeneous analysis of the planets around FGK dwarf stars observed by the Kepler and K2 missions, providing spectroscopic parameters for 310 K2 targets —including 239 Scaling K2 hosts—observed with Keck/HIRES.
Jon K. Zink, Kevin K. Hardegree-Ullman, Jessie L. Christiansen, Erik A. Petigura, Kiersten M. Boley, Sakhee Bhure, Malena Rice, Samuel W. Yee, Howard Isaacson, Rachel B. Fernandes, Andrew W. Howard, Sarah Blunt, Jack Lubin, Ashley Chontos, Daria Pidhorodetska, Mason G. MacDougall   +15 more
doaj   +1 more source

Magnetic Fabric: A Geophysical Approach for Identifying China's Neolithic Rammed Earth

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Accurate identification of rammed‐earth remains is essential for understanding early social complexity in Neolithic China. However, scientific methods for identifying rammed‐earth materials in Chinese prehistoric archeology remain limited, and identification still rely largely on field observations.
Fen Wang, Hao Wu, Lishan Liao, Qingyi Zhao, Zehao He, Shutong Wei, Chao Zhu, Zongguo Zhang, Xinquan Dang, Yiqi Dai, Zhubin Li, Yuxuan Xie, Shuai Yao, Jingyi Shen, Qingyu Lu, Qiong Chen   +15 more
wiley   +1 more source

The GALAH survey: tracing the Galactic disc with open clusters [PDF]

, 2021
Open clusters are unique tracers of the history of our own Galaxy's disc. According to our membership analysis based on Gaia astrometry, out of the 226 potential clusters falling in the footprint of the GALactic Archaeology with HERMES (GALAH) survey or ...
Ting, Y.-S., SPINA, Lorenzo, Stello, D., Cottrell, P., Schlesinger, K., D'ORAZI, VALENTINA, Zucker, D. B., Casey, A., Simpson, J., Nordlander, T., Cantat-Gaudin, T., Lin, J., Lewis, G., Lind, Karin,, Čotar, K., Frankel, N., Ting, Y., De Silva, G. M., Casey, A. R., Nordlander, T. search by orcid, Kos, J., Baratella, M., Freeman, K., Hayden, M. R., Sharma, S., Bland-Hawthorn, J., Casagrande, L., Karakas, A., Asplund, M., Zucker, D., Ting, Y. S., Spina, L., Lind, K., Martell, S., Joyce, M., Buder, S., Ting, Y. -S., Freeman, K. C., Simpson, J. D., Schlesinger, K. J., Martell, S. L., Karakas, A. I., D'Orazi, V., Hayden, M., ZwitteR, T., Silva, G., Tepper-García, T., Asplund, M. B., Lewis, G. F., D’Orazi, V.   +49 more
core   +1 more source

Minor epic: Notes toward a different “Anthropoetry”

Anthropology and Humanism, Volume 51, Issue 1, June 2026.
Abstract Anthropologists have often turned to poetry as a means of accessing emotional registers of which conventional academic prose is unable to avail. In doing so, they have tacitly conflated poetry with lyric poetry, today probably the most widely practiced poetic genre, associated in particular with the expression of inner feelings and subjectival
Stuart McLean
wiley   +1 more source

Tracing the Galactic Origins of Selected Four G-type Stars in the Solar Neighborhood

The Astronomical Journal
We present a multimethod investigation of four metal-poor G-type main-sequence stars to resolve their Galactic origins. By combining high-resolution spectroscopy from PolarBase, photometric/astrometric data from Gaia DR3, and spectral energy distribution
Deniz Cennet Çınar, Selçuk Bilir, Timur Şahin, Olcay Plevne   +3 more
doaj   +1 more source

An unsupervised machine learning approach to iron meteorite classification

Meteoritics &Planetary Science, Volume 61, Issue 6, Page 997-1011, June 2026.
Abstract Iron meteorites are usually classified manually using bivariate elemental plots. This study extends iron meteorite classification into multi‐element space. We present a computational method for the classification of iron meteorites by applying unsupervised machine learning using density‐based cluster analysis.
Louis‐Alexandre Lobanov, Hilary Downes
wiley   +1 more source

Experimental methods in chemical engineering: Atomic absorption spectrometry—AAS

The Canadian Journal of Chemical Engineering, Volume 104, Issue 5, Page 2206-2224, May 2026.
Abstract Elements absorb electromagnetic radiation (light) of a specific wavelength in proportion to the number of atoms in its path. As the atoms absorb this light energy, electrons rise from the ground state to an excited state. In atomic absorption spectrometry (AAS), high temperatures produce clouds of atoms from the sample (atomization) and ...
Emily Cintia Tossi de A. Costa, Jildimara de Jesus Santana, Viviane de Oliveira Campos, Felipe Fernandes Barbosa, Gregory S. Patience   +4 more
wiley   +1 more source

Improved Spectral Classification of Local K/M Dwarfs in SDSS Surveys. I. Chemodynamic Validation and Metallicity Calibration

The Astrophysical Journal
An examination of 109,276 spectra of low-mass stars in the Sloan Digital Sky Survey (SDSS) data archive, collected pre-2010, provides a broad collection of K/M (sub)dwarfs tracing the local ( d ≲ 250 pc) population of the thin-disk, thick-disk, and halo,
Emma Galligan, Sébastien Lépine
doaj   +1 more source

The end stage of barrier estuary infill: Insights from Jack Smith Lake, Southeastern Australia

Earth Surface Processes and Landforms, Volume 51, Issue 5, May 2026.
Infill model for the saline coastal lake estuary, Jack Smith Lake. Abstract Jack Smith Lake in southeastern Australia is an infilled saline coastal lake, disconnected from the ocean by a foredune barrier. This study explores the Holocene infill history of this estuary in order to understand the end‐stage evolution of barrier estuarine systems with ...
David M. Kennedy, Ainsley Perkin, Runjie Yuan, Ashleigh J. Rogers, Bruno David, Russell Mullett, Gunaikurnai Land and Waters Aboriginal Corporation   +6 more
wiley   +1 more source

Chemical Doppelgangers in GALAH DR3: The Distinguishing Power of Neutron-capture Elements among Milky Way Disk Stars

The Astrophysical Journal
The observed chemical diversity of Milky Way stars places important constraints on Galactic chemical evolution and the mixing processes that operate within the interstellar medium. Recent works have found that the chemical diversity of disk stars is low.
Catherine Manea, Keith Hawkins, Melissa K. Ness, Sven Buder, Sarah L. Martell, Daniel B. Zucker   +5 more
doaj   +1 more source