Results 121 to 130 of about 1,069,925 (330)

Abundance Gradients in the Galaxy

The Astrophysical Journal Supplement Series, 2006
Six H II regions at galactocentric distances of R = 10-15 kpc have been observed in the far-IR emission lines of [O III] (52 μm, 88 μm), [N III] (57 μm), and [S III] (19 μm) using the Kuiper Airborne Observatory. These observations have been combined with Very Large Array radio continuum observations of these sources to determine the abundances of O++,
Alexander L. Rudolph, Michel Fich, Gwendolyn R. Bell, Travis Norsen, Janet P. Simpson, Michael R. Haas, Edwin F. Erickson   +6 more
openaire   +1 more source

Chemical abundances in Seyfert galaxies VI. Empirical abundance calibration

, 2021
9 pages, 7 figures, accepted for publication in ...
Dors, L, O.
openaire   +2 more sources

DIRECT OXYGEN ABUNDANCES FOR LOW-LUMINOSITY LVL GALAXIES [PDF]

The Astrophysical Journal, 2012
67 pages, 9 figures, 9 tables; accepted for publication in ...
Berg, Danielle A., Skillman, Evan D., Marble, Andrew R., van Zee, Liese, Engelbracht, Charles W., Lee, Janice C., Kennicutt, Robert C., Jr., Calzetti, Daniela, Dale, Daniel A., Johnson, Benjamin D.   +9 more
openaire   +3 more sources

Morphometric and External Injury Characterization of Rainbow Trout (O. mykiss) Used for Stocking in the Alpine River Inn (Bavaria, Germany)

Fisheries Management and Ecology, EarlyView.
ABSTRACT Stocking fish is a common practice in fisheries management, particularly for species of high conservation value or economic importance. Despite its widespread use, systematic evaluation of fish stockings remains scarce. This includes non‐native species such as rainbow trout (Oncorhynchus mykiss), which are intensively stocked into European ...
Christoffer Nagel, David Goldbrunner, Josef Knott, Joachim Pander, Juergen Geist   +4 more
wiley   +1 more source

The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis

The Astrophysical Journal
We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the initial composition. We use the solar abundances from Lodders, and compute two different sets of initial stellar compositions ...
Christopher West, Alexander Heger, Benoit Côté, Lev Serxner, Haoxuan Sun   +4 more
doaj   +1 more source

Proteomic analysis of the zone of degeneration at the mitosis–meiosis transition stage in wild‐caught male catshark (Scyliorhinus canicula), correlated with an unusually high‐water temperature in the English Channel

Journal of Fish Biology, EarlyView.
Abstract In the context of current global change, variations in water temperature are one of the environmental conditions with serious consequences for marine life, including reproductive processes. In the small spotted catshark Scyliorhinus canicula, spermatogenesis occurs in spermatocysts composed of synchronously developing germ cells associated ...
Fabian Jeanne, Stanislas Pilet, Sean Heighton, Benoît Bernay, Pascal Sourdaine   +4 more
wiley   +1 more source

Analysis of the Internal Radial Gradient of Chemical Abundances in Spiral Galaxies from CALIFA

The Astrophysical Journal
The study of chemical evolution is of paramount importance for understanding the evolution of galaxies. Models and observations propose an inside-out mechanism in the formation of spiral galaxy disks, implying a negative radial gradient of elemental ...
A. F. S. Cardoso, O. Cavichia, M. Mollá, L. Sánchez-Menguiano   +3 more
doaj   +1 more source

A deep Chandra observation of the poor cluster AWM4 - II. The role of the radio jets in enriching the intra-cluster medium

, 2010
We use a Chandra observation of the poor cluster AWM4 to map the temperature and abundance of the intra-cluster medium, so as to examine the influence of the central radio galaxy on its environment.
Ascasibar, Bildfell, Brüggen, Burns, Böhringer, Cappellaro, Ciotti, David, De Grandi, Denicoló, Edge, Ewan O’Sullivan, Gastaldello, Giacintucci, Gitti, Grevesse, Hicks, Jan M. Vrtilek, Kaastra, Kalberla, Kirkpatrick, Koranyi, Kuntz, Laurence P. David, Markevitch, Mazzotta, McNamara, Mittal, Nomoto, Nulsen, O’Dea, O’Sullivan, O’Sullivan, O’Sullivan, Peterson, Pipino, Rasia, Rasmussen, Rasmussen, Rebusco, Rebusco, Roediger, Salomé, Sanders, Schombert, Simionescu, Simionescu, Simionescu, Simona Giacintucci, Snowden, Somak Raychaudhury, Vikhlinin, Weisskopf, Werner, Xiang   +54 more
core   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
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

Milky Way’s Metal-poor Stars Display Chemical Transition near the Solar Radius

The Astrophysical Journal Letters
The metal-poor stars of a galaxy offer insights into that galaxy’s early formation processes and accretion history. Here, we investigate whether the metal-poor stars of our Milky Way Galaxy exhibit any characteristic trends in Galactocentric distance ...
Khyati Malhan
doaj   +1 more source