Results 111 to 120 of about 210,874 (237)

TEMPLATES: Direct Abundance Constraints for Two Lensed Lyman-break Galaxies

The Astrophysical Journal
Using integrated spectra for two gravitationally lensed galaxies from the JWST TEMPLATES Early Release Science program, we analyze faint auroral lines, which provide direct measurements of the gas-phase chemical abundance.
Brian Welch, Grace M. Olivier, Taylor A. Hutchison, Jane R. Rigby, Danielle A. Berg, Manuel Aravena, Matthew B. Bayliss, Jack E. Birkin, Scott C. Chapman, Håkon Dahle, Michael D. Gladders, Gourav Khullar, Keunho J. Kim, Guillaume Mahler, Matthew A. Malkan, Desika Narayanan, Kedar A. Phadke, Keren Sharon, J. D. T. Smith, Manuel Solimano, Justin S. Spilker, Joaquin D. Vieira, David Vizgan   +22 more
doaj   +1 more source

Modeling the Ages and Chemical Abundances of Elliptical Galaxies

The Astrophysical Journal
Spectroscopic studies of elliptical galaxies show that their stellar population ages, mean metallicity, and α enhancement traced by [Mg/Fe] all increase with galaxy stellar mass or velocity dispersion.
Nicole Marcelina Gountanis, David H. Weinberg, Aliza G. Beverage, Nathan R. Sandford, Charlie Conroy, Mariska Kriek   +5 more
doaj   +1 more source

Abundance of the chemical elements in man's diet and possible relations with environmental factors

, 1973
E.I. Hamilton, M.J. Minski
openalex   +1 more source

The chemical abundances of Planetary Nebulae in Centaurus-A (NGC 5128) [PDF]

, 1997
N. A. Walton, J. R. Walsh, George H. Jacoby, R. F. Peletier   +3 more
openalex   +1 more source

Mixed Source Region Signatures inside Magnetic Switchback Patches Inferred by Heavy Ion Diagnostics

The Astrophysical Journal
Since Parker Solar Probe’s (Parker’s) first perihelion pass at the Sun, large-amplitude Alfvén waves grouped in patches have been observed near the Sun throughout the mission.
Yeimy J. Rivera, Samuel T. Badman, Michael L. Stevens, Jim M. Raines, Christopher J. Owen, Kristoff Paulson, Tatiana Niembro, Stefano A. Livi, Susan T. Lepri, Enrico Landi, Jasper S. Halekas, Tamar Ervin, Ryan M. Dewey, Jesse T. Coburn, Stuart D. Bale, B. L. Alterman   +15 more
doaj   +1 more source

The Chemical Composition of the Small Magellanic Cloud HiiRegion NGC 346 and the Primordial Helium Abundance [PDF]

, 2000
M. Peimbert, Antonio Peimbert, M. T. Ruíz   +2 more
openalex   +1 more source

Simulating Chemical Abundances in the Circumstellar Nebula of the Late Stage Binary RY Scuti

The Astronomical Journal
RY Scuti, thought to be a Wolf–Rayet (WR) progenitor, is a massive post-main-sequence binary star system undergoing Roche-lobe overflow (RLOF). SOFIA (+FORCAST) spectroscopy of the inner, ionized region of RY Scuti’s double ringed toroidal nebula affirms
Sarah H. Taft, Robert D. Gehrz, Charles E. Woodward, Nathan Smith, Isabelle Perron, Annalisa Citro   +5 more
doaj   +1 more source

Connections between Planetary Populations and Chemical Characteristics of Their Host Stars

The Astrophysical Journal
Chemical anomalies in planet-hosting stars (PHSs) are studied in order to assess how the planetary nature and multiplicity affect the atmospheric chemical abundances of their host stars.
Sol Yun, Young Sun Lee, Young Kwang Kim, Timothy C. Beers, Berfin Togay, Dongwook Lim   +5 more
doaj   +1 more source

Chemical evolution of irregular galaxies and the primordial He-4 abundance

, 1993
Grant J. Mathews, R. N. Boyd, George M. Fuller   +2 more
openalex   +1 more source

Chemical Evolution of Damped Lyα Galaxies: The [S/Zn] Abundance Ratio at Redshift ≥2 [PDF]

, 2000
Miriam Centurión, P. Bonifacio, P. Molaro, G. Vladilo   +3 more
openalex   +1 more source