Results 121 to 130 of about 29,820 (298)

Population Synthesis Models for Normal Galaxies with Dusty Disks [PDF]

Journal of Astronomy and Space Sciences, 2003
To investigate the SEDs of galaxies considering the dust extinction processes in the galactic disks, we present the population synthesis models for normal galaxies with dusty disks. We use PEGASE (Fioc & Rocca-Volmerange 1997) to model them with standard
Kyung-Won Suh, Mi-Ryang Kim
doaj   +1 more source

[O/Fe] Estimates for Carbon-Enhanced Metal-Poor Stars from Near-IR Spectroscopy

, 2011
We report on oxygen abundances determined from medium-resolution near-IR spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO survey.
Alonso, Aoki, Beers, Beers, Bertrand Plez, Catherine R. Kennedy, Cohen, Collet, Cristallo, Denissenkov, Denissenkov, Falk Herwig, Frebel, Herwig, Herwig, Herwig, Ito, Johnson, Karakas, Kurucz, Lucatello, Lugaro, Marsteller, Marsteller, Meléndez, Meynet, Norbert Christlieb, Norris, Placco, Rossi, Schuler, Siess, Silvia Rossi, Skrutskie, Thirupathi Sivarani, Timothy C. Beers, Tominaga, Umeda, Vinicius M. Placco, Wasserburg, Woodward, Young Sun Lee   +41 more
core   +1 more source

Mass Outflow and Chromospheric Activity of Red Giant Stars in Globular Clusters II. M13 and M92 [PDF]

, 2009
High resolution spectra of 123 red giant stars in the globular cluster M13 and 64 red giant stars in M92 were obtained with Hectochelle at the MMT telescope.
A. K. Dupree, Avrett, Baldry, Boyer, Boyer, Buonanno, Buonanno, Catelan, Catelan, Cavallo, Cho, Drukier, Ferraro, Helling, Kadla, Kemp, Lee, Lee, Ludendorff, Mayor, Mészáros, Piotto, Renzini, Russeva, Sills, Skrutskie, Sneden, Soker, Sweigart, Sz. Mészáros, Szentgyorgyi, T. Szalai, Zarro   +32 more
core   +1 more source

NUCLEOSYNTHESIS IN ELECTRON CAPTURE SUPERNOVAE OF ASYMPTOTIC GIANT BRANCH STARS [PDF]

, 2008
We examine nucleosynthesis in the electron capture supernovae of progenitor asymptotic giant branch stars with an O–Ne–Mg core (with the initial stellar mass of 8.8 M☉).
S. Wanajo, K. Nomoto, H. Janka, F. Kitaura, B. Mueller   +4 more
semanticscholar   +1 more source

CYANOGEN IN NGC 1851 RED GIANT BRANCH AND ASYMPTOTIC GIANT BRANCH STARS: QUADRIMODAL DISTRIBUTIONS [PDF]

The Astrophysical Journal, 2012
The Galactic globular cluster NGC 1851 has raised much interest since Hubble Space Telescope photometry revealed that it hosts a double subgiant branch. Here we report on our homogeneous study into the cyanogen (CN) band strengths in the red giant branch (RGB) population (17 stars) and asymptotic giant branch (AGB) population (21 stars) using AAOmega ...
Campbell, S, Yong, David, Wylie de Boer, Elizabeth, Stancliffe, R J, Lattanzio, John, Angelou, G C, D'Orazi, V D, Martell, S L, Grundahl, Frank, Sneden, Chris   +9 more
openaire   +2 more sources

On the Pre‐ and Post‐Positional Semi‐Random Graph Processes

Journal of Graph Theory, Volume 108, Issue 4, Page 819-831, April 2025.
ABSTRACT We study the semi‐random graph process, and a variant process recently suggested by Nick Wormald. We show that these two processes are asymptotically equally fast in constructing a semi‐random graph G $G$ that has property P ${\mathscr{P}}$, for the following examples of P ${\mathscr{P}}$: (1) P ${\mathscr{P}}$ is the set of graphs containing ...
Pu Gao, Hidde Koerts
wiley   +1 more source

Non-radial oscillations in M-giant semi-regular variables: Stellar models and Kepler observations

, 2014
The success of asteroseismology relies heavily on our ability to identify the frequency patterns of stellar oscillation modes. For stars like the Sun this is relatively easy because the mode frequencies follow a regular pattern described by a well ...
Bedding, T. R., Bellamy, B., Christensen-Dalsgaard, J., Compton, D., Garcia, R. A., Kiss, L. L., Kjeldsen, H., Mathur, S., Stello, D.   +8 more
core   +1 more source

Modelling the evolution and nucleosynthesis of carbon-enhanced metal-poor stars [PDF]

, 2008
We present the results of binary population simulations of carbon-enhanced metal-poor (CEMP) stars. We show that nitrogen and fluorine are useful tracers of the origin of CEMP stars, and conclude that the observed paucity of very nitrogen-rich stars puts
Bonačić Marinović, Duquennoy, Izzard, Jonsell, Jorissen, Lugaro, M. Lugaro, Meynet, O. R. Pols, R. G. Izzard, S. E. de Mink, Stancliffe   +11 more
core   +1 more source

Magnetic Mixing in Red Giant and Asymptotic Giant Branch Stars [PDF]

The Astrophysical Journal, 2008
The available information on isotopic abundances in the atmospheres of low-mass Red Giant Branch (RGB) and Asymptotic Giant Branch (AGB) stars requires that episodes of extensive mixing occur below the convective envelope, reaching down to layers close to the hydrogen burning shell (Cool Bottom Processing).
Nordhaus J., BUSSO, Maurizio Maria, Wasserburg G. J., Blackman E., PALMERINI, SARA   +4 more
openaire   +3 more sources

Ecological Implications of Germination Temperature on Native and Invasive Rumex Spp.

Plant-Environment Interactions, Volume 6, Issue 2, April 2025.
ABSTRACT Rumex alpinus L. (R. alpinus) is a non‐native invasive plant in Czech mountain regions, altering ecosystem structure and function in protected areas. Rumex obtusifolius L. (R. obtusifolius) is a native species and a problematic weed in Czech meadows, while Rumex longifolius DC. (R.
Michaela Jungová, Martina Kadlecová, Vilém Pavlů, Leona Leišová‐Svobodová, Pavel Svoboda, Zdenka Martinková   +5 more
wiley   +1 more source