Results 11 to 20 of about 954,000 (309)

Intermediate Element Abundances in Galaxy Clusters [PDF]

The Astrophysical Journal, 2003
We present the average abundances of the intermediate elements obtained by performing a stacked analysis of all the galaxy clusters in the archive of the X-ray telescope ASCA.
Arnaud M., Cappellaro E., D. J. Horner, Fukazawa Y., Gibson B. K., Grevesse N., Grevesse N., Guainazzi M., Ishimaru Y., M. Loewenstein, Matsumoto H., Mitchell R. J., Peimbert M., R. F. Mushotzky, Tanaka Y., W. H. Baumgartner   +15 more
core   +4 more sources

Extending Ultra-Diffuse Galaxy Abundances to Milky Way Analogs [PDF]

Monthly notices of the Royal Astronomical Society, 2022
We extend the Ultra-Diffuse Galaxy (UDG) abundance relation, NUDG − M200, to lower halo mass hosts (M200 ∼ 1011.6 − 12.2M⊙). We select UDG satellites from published catalogs of dwarf satellite galaxies around Milky Way analogs, namely the Exploration ...
Ananthan Karunakaran, Dennis Zaritsky
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VLT/FLAMES high-resolution chemical abundances in Sculptor: a textbook dwarf spheroidal galaxy [PDF]

Astronomy & Astrophysics, 2019
We present detailed chemical abundances for 99 red-giant branch stars in the centre of the Sculptor dwarf spheroidal galaxy, which have been obtained from high-resolution VLT/FLAMES spectroscopy.
V. Hill, Á. Skúladóttir, E. Tolstoy, K. A. Venn, M. D. Shetrone, P. Jablonka, F. Primas, G. Battaglia, T. J. L. de Boer, P. François, A. Helmi, A. Kaufer, B. Letarte, E. Starkenburg, M. Spite   +14 more
openalex   +3 more sources

Complete element abundances of nine stars in the r-process galaxy Reticulum II [PDF]

, 2016
We present chemical abundances derived from high-resolution Magellan/MIKE spectra of the nine brightest known red giant members of the ultra-faint dwarf galaxy Reticulum II.
Chiti, Anirudh, Frebel, Anna, Ji, Alexander P., Simon, Joshua D.   +3 more
core   +4 more sources

APOGEE Chemical Abundances of the Sagittarius Dwarf Galaxy [PDF]

, 2017
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) provides the opportunity to measure elemental abundances for C, N, O, Na, Mg, Al, Si, P, K, Ca, V, Cr, Mn, Fe, Co, and Ni in vast numbers of stars.
Almeida, Andres, Alvar, Emma Fernández, Anguiano, Borja, Battaglia, Giuseppina, Beers, Timothy C., Carigi, Leticia, Fernández-Trincado, J. G., Frinchaboy, Peter, García-Hernández, D. A., Geisler, Doug, Hasselquist, Sten, Holtzman, Jon, Inglada, Gloria Delgado, Majewski, Steven R., McWilliam, Andrew, Minniti, Dante, Nidever, David L., Placco, Vinicius M., Prieto, Carlos Allende, Schultheis, Mathias, Shetrone, Matthew, Smith, Verne, Sobeck, Jennifer, Tang, Baitian, Tissera, Patricia B., Villanova, Sandro   +25 more
core   +2 more sources

Chemical behavior of the Dwarf Irregular Galaxy NGC 6822. Its PN and HII region abundances [PDF]

, 2009
We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822 The selected objects are distributed in different zones of the galaxy.
Allen, Bauman, Brandenburg, Carigi, Carigi, Carigi, Costa, de Blok, de Blok, Demers, Dufour, Fisher, Franco, Gieren, Grevesse, Henry, Henry, Hernández-Martínez, Herwig, Hidalgo-Gámez, Hirschi, Hirschi, Hodge, J. García-Rojas, Karakas, Killen, Kingdon, Kingsburgh, Kniazev, Kroupa, L. Carigi, L. Hernández-Martínez, Lee, Leisy, Leisy, Leisy, M. Peña, Magrini, Magrini, Marigo, Massey, Mateo, Meynet, Nomoto, Peimbert, Peimbert, Peña, Porter, Richer, Richer, Seaton, Shaw, Stasinska, Storey, Venn, Wang, Woosley   +56 more
core   +2 more sources

Non‐LTE Abundances and Consequences for the Evolution of the α‐Elements in the Galaxy [PDF]

, 2000
Abundances of α-elements such as Ca and Mg in disk and halo stars are usually derived from equivalent width lines measured on high-resolution spectra and assuming local thermodynamic equilibrium (LTE).
T. E. P. Idiart, Mathieu Thévenin
openalex   +3 more sources

Metals in Star-forming Galaxies with KCWI. I. Methodology and First Results on the Abundances of Iron, Magnesium, and Oxygen

The Astrophysical Journal
Understanding the chemical enrichment of different elements is crucial to gaining a complete picture of galaxy chemical evolution. In this study, we present a new sample of 46 low-redshift, low-mass star-forming galaxies at M _* ∼ 10 ^8−10 M _⊙ along ...
Zhuyun Zhuang, Evan N. Kirby, Charles C. Steidel, Mithi A. C. de los Reyes, Nikolaus Z. Prusinski, N. Leethochawalit, Minjung Park, Charlie Conroy, Evan H. Nuñez   +8 more
doaj   +2 more sources

UVES Observations of QSO 0000−2620: Oxygen and Zinc Abundances in the Damped Lyα Galaxy atz_abs = 3.3901 [PDF]

, 2000
Observations of the QSO 0000-2620 with the Ultraviolet-Visual Echelle Spectrograph at the 8.2 m ESO Kueyen telescope are used for abundance analysis of the damped Lyα system at zabs = 3.3901.
P. Molaro, P. Bonifacio, Miriam Centurión, S. D’Odorico, G. Vladilo, Paolo Santin, P. Di Marcantonio   +6 more
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Abundance Distributions in Barred Galaxies [PDF]

International Astronomical Union Colloquium, 1996
AbstractI review the evidence for global abundance gradients in barred galaxies to be flatter when compared with those of normal galaxies. The finding that the abundance gradient becomes flatter as the strength of the bar increases, illustrates the effectiveness of radial flows induced by bars at transporting large amount of gas across galaxy disks.
Jean-René Roy
openalex   +2 more sources