Results 91 to 100 of about 29,820 (298)

Dust from asymptotic giant branch stars: relevant factors and modelling uncertainties [PDF]

, 2014
The dust formation process in the winds of Asymptotic Giant Branch stars is discussed, based on full evolutionary models of stars with mass in the range 1M⊙ 6M6 8M⊙, and metallicities 0.001 < Z < 0.008. Dust grains are assumed to form in an isotropically
P. Ventura, F. Dell’Agli, F. Dell’Agli, R. Schneider, M. Criscienzo, C. Rossi, F. Franca, S. Gallerani, R. Valiante   +8 more
semanticscholar   +1 more source

Vortices in the Wakes of Asymptotic Giant Branch Stars [PDF]

The Astrophysical Journal, 2007
Vortices have been postulated at a range of size scales in the universe, including at the stellar-size scale. While hydrodynamically simulating the wind from an asymptotic giant branch (AGB) star moving through and sweeping up its surrounding interstellar medium (ISM), we have found vortices on the size scale of 10-1 to 101 pc in the wake of the star ...
Wareing, C. J., Zijlstra, Albert A., O'Brien, T. J.   +2 more
openaire   +2 more sources

Imputation of Fisheries Reference Points for Endangered Data‐Poor Fishes, With Application to Rhino Rays

Fish and Fisheries, Volume 26, Issue 5, Page 848-865, September 2025.
ABSTRACT For data‐limited fish species, sustainable management frequently relies on biological metrics that are derived from life‐history trait data, as opposed to high‐resolution time series of catch and abundance. These biological metrics are used to assess a species' recovery potential at low population densities, as well as their extinction risk ...
Catharine Horswill, Holly K. Kindsvater, Nick K. Dulvy, Chris G. Mull, Aaron B. Judah, Brooke M. D'Alberto, Jason Matthiopoulos, Marc Mangel   +7 more
wiley   +1 more source

Asymptotic giant branch stars in the Phoenix dwarf galaxy [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
JHKs near-infrared photometry of stars in the Phoenix dwarf galaxy is presented and discussed. Combining these data with the optical photometry of Massey et al. allows a rather clean separation of field stars from Phoenix members. The discovery of a Mira variable (P = 425 days), which is almost certainly a carbon star, leads to an estimate of the ...
Menzies, J. W, Feast, M.W., Whitelock, Patricia A, Olivier, E. A., Matsunaga, G, Da Costa, Gary   +5 more
openaire   +3 more sources

An Innovative Tool for Measuring Sunlight Propagation Through Different Snowpacks

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract Sunlight penetration in the snowpack plays a fundamental role in many environmental processes, ranging from local energy balance to snow microbiology and can potentially contribute to climate change. In addition, many photochemical reactions typically occur in the snowpack driven by solar radiation.
Luca Teruzzi, Andrea Spolaor, David Cappelletti, Claudio Artoni, Marco A. C. Potenza   +4 more
wiley   +1 more source

Evidence of Third Dredge-up in Post-AGB Stars in Galactic Globular Clusters

The Astrophysical Journal
To better understand the mixing and mass loss experienced by low-mass stars as they ascend the asymptotic giant branch (AGB), I have gathered from the literature the abundances of CNO and s -process elements in post-AGB stars in Galactic globular ...
William V. Dixon
doaj   +1 more source

Tracing the Evolution of SMBHs and Stellar Objects in Galaxy Mergers: A Multi-mass Direct N-body Model

The Astrophysical Journal, 2023
By using direct N -body numerical simulations, we model the dynamical coevolution of two supermassive black holes (SMBHs) and the surrounding stars in merging galaxies. In order to investigate how different stellar components evolve during the merger, we
Shuo Li, Shiyan Zhong, Peter Berczik, Rainer Spurzem, Xian Chen, F. K. Liu   +5 more
doaj   +1 more source

Chemical trends in the Galactic halo from APOGEE data [PDF]

, 2016
Indexación: Web of Science; Scopus.The galaxy formation process in the A cold dark matter scenario can be constrained from the analysis of stars in the Milky Way's halo system.
Anders, F, Beers, TC, Carigi, L, Chiappini, C, da Costa, LN, Fernandez-Alvar, E, Fernandez-Trincado, JG, Hayden, MR, Meza, A, Prieto, CA, Queiroz, AB, Santiago, BX, Schultheis, M   +12 more
core   +1 more source

EVOLUTION OF THERMALLY PULSING ASYMPTOTIC GIANT BRANCH STARS. IV. CONSTRAINING MASS LOSS AND LIFETIMES OF LOW MASS, LOW METALLICITY AGB STARS [PDF]

, 2014
The evolution and lifetimes of thermally pulsating asymptotic giant branch (TP-AGB) stars suffer from significant uncertainties. In this work, we analyze the numbers and luminosity functions of TP-AGB stars in six quiescent, low metallicity ([Fe/H] ≲ −0 ...
P. Rosenfield, P. Marigo, L. Girardi, J. Dalcanton, A. Bressan, M. Gullieuszik, D. Weisz, B. Williams, A. Dolphin, B. Aringer   +9 more
semanticscholar   +1 more source

Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204

The Astronomical Journal
We have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29
Barbara J. Anthony-Twarog, Constantine P. Deliyannis, Aaron Steinhauer, Qinghui Sun, Bruce A. Twarog   +4 more
doaj   +1 more source