Results 21 to 30 of about 52,001 (350)

CHEMICAL COMPOSITION OF GALACTIC DISK STARS

Odessa Astronomical Publications, 2007
Abundances of Na, Al, Ca, in the stars of galactic disks are obtained. The separation of thin and stars on cinematic criterion was made early. The behavior of chemical element abundances with metallicity for studied stars was presented.
T. V. Mishenina, N. Yu. Basak, T. I. Gorbaneva, C. Soubiran, V. V. Kovtyukh   +4 more
doaj   +1 more source

Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way [PDF]

, 2006
This paper presents a homogeneous study of abundances in a sample of 79 northern galactic planetary nebulae whose morphological classes have been uniformly determined.
Arturo Manchado, Brocklehurst M., Cahn J. H., Clegg R. E. S., Corradi R. L. M., Cuisinier F., Eva Villaver, Katia Cunha, Kingsburgh R. L., Letizia Stanghellini, Maciel W. J., Maciel W. J., Martin Antonio Guerrero, Martins L. P., Schwarz H. E., Stanghellini L.   +15 more
core   +2 more sources

THE SULPHUR ABUNDANCE BEHAVIOUR IN THE GALACTIC DISC STARS

Odessa Astronomical Publications, 2016
The sulphur abundances in the atmospheres of the F-G-K-type dwarf stars that belong to the thin and thick disc populations (in the metallicity range – 1.0 < [Fe/H] < 0.3) were determined.
T. V. Mishenina, O. P. Paramonova
doaj   +1 more source

Boron abundances in the Galactic disk [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWhen compared to lithium and beryllium, the absence of boron lines in the optical results in a relatively small data set of boron abundances measured in Galactic stars to date. In this paper we discuss boron abundances published in the literature and focus on the evolution of boron in the Galaxy as measured from pristine boron abundances in ...
openaire   +2 more sources

HAFNIUM ABUNDANCES IN FGK DWARF OF GALACTIC DISK

Odessa Astronomical Publications, 2018
In this work we present new observational data for hafnium (72). Hf is an important element that is between the lightest rare-earth elements (e.g., La, Z = 57) with elements of the third r-process peak (Os, Ir, Pt, Z =76-78). Hafnium is the heaviest (Z =
T. I. Gorbaneva, T. V. Mishenina
doaj   +1 more source

Rubidium and zirconium abundances in massive Galactic asymptotic giant branch stars revisited [PDF]

, 2017
Luminous Galactic OH/IR stars have been identified as massive (>4-5 M_s) AGB stars experiencing HBB and Li production. Their Rb abundances and [Rb/Zr] ratios derived from hydrostatic model atmospheres, are significantly higher than predictions from AGB ...
Garcia-Hernandez, D. A., Karakas, A. I., Lugaro, M., Manchado, A., Perez-Mesa, V., Plez, B., Zamora, O.   +6 more
core   +3 more sources

Oxygen, $\alpha$-element and iron abundance distributions in the inner part of the Galactic thin disc. II [PDF]

, 2016
We have derived the abundances of 36 chemical elements in one Cepheid star, ASAS 181024--2049.6, located R$_{\rm G}= 2.53$ kpc from the Galactic center. This star falls within a region of the inner thin disc poorly sampled in Cepheids.
Andrievsky, S. M., Korotin, S. A., Kovtyukh, V. V., Lépine, J. R. D., Martin, R. P.   +4 more
core   +1 more source

Galactic simulations of r-process elemental abundances [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Accepted by MNRAS: 2018 December ...
Haynes, Christopher, Kobayashi, Chiaki
openaire   +2 more sources

THE IRON ABUNDANCE IN GALACTIC PLANETARY NEBULAE [PDF]

The Astrophysical Journal, 2009
Accepted for publication in ApJ.
Delgado-Inglada, G., Rodriguez, M., Mampaso, A., Viironen, K.   +3 more
openaire   +2 more sources

Retracted: Can the chemical industry solve the climate change?On the role of human energy production, renewable energies, and the potential of chemistry as a solution provider

Chemie Ingenieur Technik, EarlyView., 2023
Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
wiley   +1 more source