Results 41 to 50 of about 362 (198)

TESS Subgiant and Lower-red-giant Asteroseismology in the Continuous Viewing Zones

The Astrophysical Journal
Asteroseismology, the study of stellar oscillations, and stellar modeling both offer profound insights into the fundamental properties and evolution of stars.
Sophia Grusnis, Jamie Tayar, Diego Godoy-Rivera   +2 more
doaj   +1 more source

Estimating Soil Electrical Parameters in the Canadian High Arctic From Impedance Measurements of the MIST Antenna Above the Surface

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract The MIST experiment aims to detect the cosmological 21‐cm signal through sky observations at 25–125 MHz using a wide‐beam antenna. The antenna is mounted above the soil and the beam characteristics are highly dependent on the soil's electrical properties.
I. Hendricksen, R. A. Monsalve, V. Bidula, C. Altamirano, R. Bustos, C. H. Bye, H. C. Chiang, X. Guo, F. McGee, F. P. Mena, L. Nasu‐Yu, C. Omelon, S. E. Restrepo, J. L. Sievers, L. Thomson, N. Thyagarajan   +15 more
wiley   +1 more source

Galactic Archaeology with the Subaru Prime Focus Spectrograph [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractWe present an overview of our Galactic Archaeology (GA) survey program with the Prime Focus Spectrograph (PFS) for Subaru. Following successful design reviews, the instrument is now under construction with first light anticipated in 2018. Main characteristics of PFS and the science goals in our PFS/GA program are described.
Masashi Chiba, Judith Cohen, Rosemary F. G. Wyse   +2 more
openaire   +1 more source

The APO-K2 Catalog. II. Accurate Stellar Ages for Red Giant Branch Stars across the Milky Way

The Astronomical Journal
We present stellar age determinations for 4661 red giant branch stars in the APO-K2 catalog, derived using mass estimates from K2 asteroseismology from the K2 Galactic Archaeology Program and elemental abundances from the Apache Point Galactic Evolution ...
Jack T. Warfield, Joel C. Zinn, Jessica Schonhut-Stasik, James W. Johnson, Marc H. Pinsonneault, Jennifer A. Johnson, Dennis Stello, Rachael L. Beaton, Yvonne Elsworth, Rafael A. García, Savita Mathur, Benoît Mosser, Aldo Serenelli, Jamie Tayar   +13 more
doaj   +1 more source

A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE

The Astrophysical Journal, 2023
We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), α -element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observatory ...
Julie Imig, Cathryn Price, Jon A. Holtzman, Alexander Stone-Martinez, Steven R. Majewski, David H. Weinberg, Jennifer A. Johnson, Carlos Allende Prieto, Rachael L. Beaton, Timothy C. Beers, Dmitry Bizyaev, Michael R. Blanton, Joel R. Brownstein, Katia Cunha, José G. Fernández-Trincado, Diane K. Feuillet, Sten Hasselquist, Christian R. Hayes, Henrik Jönsson, Richard R. Lane, Jianhui Lian, Szabolcs Mészáros, David L. Nidever, Annie C. Robin, Matthew Shetrone, Verne Smith, John C. Wilson   +26 more
doaj   +1 more source

Usage of the term provenance in LIS literature: An Annual Review of Information Science and Technology (ARIST) paper

Journal of the Association for Information Science and Technology, Volume 77, Issue 1, Page 92-107, January 2026.
Abstract Provenance is the story of how something has come to be. In this paper, we provide a systematic literature review to categorize the various notions of provenance in Information Sciences. The goal of this review is to paint a broader picture of the multiple uses of provenance at play and to enhance our understanding of the importance of ...
Rhiannon Bettivia, Yi‐Yun Cheng, Michael R. Gryk   +2 more
wiley   +1 more source

Revealing the Origins of Galactic Globular Clusters via their Mg–Al Abundances

The Astrophysical Journal Letters
Many Galactic globular clusters (GCs) originated in diverse host galaxies before being subsequently incorporated into the Milky Way through hierarchical galaxy assembly. Identifying their origins is crucial for revealing galaxy properties at early times.
Shihui Lin, Baitian Tang, Genghao Liu, José G. Fernández-Trincado, Douglas Geisler, Guy Worthey, Dante Minniti   +6 more
doaj   +1 more source

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
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

NLTE Analysis of Y i and Y ii in the Atmospheres of FGK Stars

The Astrophysical Journal, 2023
The nonlocal thermodynamical equilibrium (NLTE) line formation of Y i and Y ii is considered in 1D LTE model atmospheres of FGK-type stars. The model atom was constructed with the most up-to-date atomic data, including quantum cross sections and rate ...
Sofya Alexeeva, Yu Wang, Gang Zhao, Feng Wang, Yong Wu, Jianguo Wang, Hongliang Yan, Jianrong Shi   +7 more
doaj   +1 more source