Results 91 to 100 of about 50,982 (241)

Boo-1137 - An Extremely Metal-Poor Star in the Ultra-Faint Dwarf Spheroidal Galaxy Bo\"{o}tes I

, 2009
We present high-resolution, high-S/N spectra of an extremely metal- poor giant star Boo-1137 in the "ultra-faint" dwarf spheroidal galaxy (dSph) Bootes I (absolute magnitude Mv ~ -6.3).
Abazajian, Asplund, Belokurov, Belokurov, Castelli, Cohen, Cohen, David Yong, Demarque, Frebel, Gerard Gilmore, Gratton, Helmi, John E. Norris, Johnson, Kirby, Klypin, Kobayashi, Koch, Kurucz, Lai, Lucatello, Magain, Martin, Moore, Nissen, Norris, Norris, Norris, Rosemary F. G. Wyse, Saito, Schlegel, Thevénin, Unavane, Venn, Yong   +35 more
core   +1 more source

PN Abundances in Different Galactic Systems [PDF]

Symposium - International Astronomical Union, 1993
Developments in the measurement of abundances in planetary nebulae since IAU Symposium 131 are reviewed. Present uncertainties and outstanding problems in the interpretation of emission-line measurements are discussed. Results for different samples of PN are reviewed, in terms of the galactic site.
openaire   +2 more sources

CHEMICAL COMPOSITION OF ATMOSPHERES OF COOL GIANT STARS

Odessa Astronomical Publications, 2017
Results of determination of abundances of chemical elements in the atmospheres of 57 giant stars of the oxygen sequence of the Galactic disk axe given.
N. S. Komarov
doaj   +1 more source

On the Abundance of Heavy Elements in the Galactic Centre [PDF]

, 1976
D. K. Aitken, J. Griffiths, Barbara Jones   +2 more
openalex   +1 more source

Chemical Abundances of Planetary Nebulae in M33

, 2004
Using spectroscopic data presented in Magrini et al. (2003), we have analyzed with the photoionization code CLOUDY 94.00 (Ferland et al. 1998) 11 Planetary Nebulae belonging to the spiral galaxy M 33. Central star temperatures and nebular parameters have
A. Mampaso, Ambartsumian, Armsdorfer, Che, Corradi, Costa, Dufour, Exter, Ferland, Gurzadyan, Henry, Howard, Iben, Jacoby, Jacoby, Jacoby, Kingsburgh, L. Magrini, Leisy, M. Perinotto, Magrini, Mampaso, Maran, Morisset, Peimbert, Perinotto, Phillips, R. L. M. Corradi, Rauch, Richer, Stasinska, Vílchez, Walsh, Walsh   +33 more
core   +1 more source

MOLYBDENUM AND RUTHENIUM IN THE GALAXY

Odessa Astronomical Publications, 2018
We present a brief overview of the molybdenum and ruthenium present-day nucleosynthesis calculations  and abundance determinations in stars belonging to different substructures (populations) in the Galaxy.
T. V. Mishenina, T. I. Gorbaneva
doaj   +1 more source

The galactic abundance gradient [PDF]

Monthly Notices of the Royal Astronomical Society, 1983
Lynette M. Newton, A. C. Danks, P. A. Shaver, Stuart Pottasch, R. X. McGee   +4 more
openaire   +2 more sources

Elemental abundances in the centre of the Galactic nuclear disc

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT We have made the first attempt to derive the chemical properties of the Galactic disc at its very central part using high-resolution infrared spectroscopic observations of four classical Cepheids. These stars are located at Galactocentric distances smaller than 1 kpc.
Walter J. Maciel, R. P. Martin, Jacques Raymond Daniel Lépine, S. A. Korotin, Sergei M. Andrievsky, Sergei M. Andrievsky, Sergei M. Andrievsky, E. A. Panko, V. V. Kovtyukh, V. V. Kovtyukh, L. E Keir .   +10 more
openaire   +5 more sources

Phosphorus-bearing molecules PO and PN at the edge of the Galaxy. [PDF]

Nature, 2023
Koelemay LA, Gold KR, Ziurys LM.
europepmc   +1 more source

Galactic abundance gradient

Odessa Astronomical Publications, 2017
An overview of three ...
openaire   +2 more sources