Results 111 to 120 of about 29,820 (298)

A Study of the Dusty Disks and Shells around Post-RGB Stars in the LMC

Galaxies, 2022
A new class of dusty post-Red Giant Branch (post-RGB) stars has recently been identified in the Magellanic Clouds. Their spectral energy distributions (SEDs) suggest that their mass-ejecta are similar to dusty post-Asymptotic Giant Branch (post-AGB ...
Geetanjali Sarkar, Raghvendra Sahai
doaj   +1 more source

The connection between missing AGB stars and extended horizontal branches

, 2010
Recent surveys confirm early results about a deficiency or even absence of CN-strong stars on the asymptotic giant branch (AGB) of globular clusters (GCs), although with quite large cluster-to-cluster variations.
A. Bragaglia, Bertelli, Brown, Buzzoni, Campbell, Caputo, Carretta, Carretta, Carretta, Castellani, Castellani, D’Cruz, E. Carretta, Frogel, Gratton, Greggio, Harris, Lee, Mallia, Marigo, Moehler, Norris, Paczynski, Pilachowski, Piotto, R. G. Gratton, Reimers, Renzini, Ripepi, Rosenberg, Rosenberg, S. Lucatello, Smith, Sneden, Sweigart, V. D’Orazi, Ventura   +36 more
core   +1 more source

LOST AND FOUND: EVIDENCE OF SECOND-GENERATION STARS ALONG THE ASYMPTOTIC GIANT BRANCH OF THE GLOBULAR CLUSTER NGC 6752 [PDF]

, 2016
We derived chemical abundances for C, N, O, Na, Mg, and Al in 20 asymptotic giant branch (AGB) stars in the globular cluster (GC) NGC 6752. All these elements (but Mg) show intrinsic star-to-star variations and statistically significant correlations or ...
E. Lapenna, C. Lardo, A. Mucciarelli, M. Salaris, F. Ferraro, B. Lanzoni, D. Massari, P. Stetson, S. Cassisi, A. Savino   +9 more
semanticscholar   +1 more source

Of Biogeography, Fishes and Kelp: Environmental DNA Metabarcoding the Great African Seaforest

Diversity and Distributions, Volume 31, Issue 6, June 2025.
ABSTRACT Aim The biodiversity associated with kelp forest ecosystems is understudied globally, including in South Africa, where kelp forests have expanded their range under climate change. This study used environmental DNA (eDNA) metabarcoding to assess fish biodiversity across an expansive range (~1000 km) of South Africa's kelp forests, contributing ...
Kira‐Lee Courtaillac, Jannes Landschoff, Sophie von der Heyden   +2 more
wiley   +1 more source

Mira Variables Based on Emission Lines in LAMOST DR9

The Astrophysical Journal
We present a sample of 335 Mira variables, extracted from DR9 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey. These variables are characterized by the Balmer emissions (H δ , H γ , H β , and H α ) and the metal emissions
Cai-Xia Qu, A-Li Luo, Bing Du, Shu-Guo Ma   +3 more
doaj   +1 more source

Stellar evolution as seen by mixed modes

EPJ Web of Conferences, 2015
The detection of mixed modes in subgiants and red giants allows us to monitor stellar evolution from the main sequence to the asymptotic giant branch and draw seismic evolutionary tracks.
Mosser Benoît
doaj   +1 more source

Effects of Alpha-Element Enhancement and the Thermally Pulsing-Asymptotic Giant Branch on Surface Brightness Fluctuation Magnitudes and Broadband Colors [PDF]

, 2009
We investigate the effects of alpha-element enhancement and the thermally pulsing-asymptotic giant branch (TP-AGB) stars on the surface brightness fluctuation (SBF) magnitudes and broadband colors of simple stellar populations and compare to the ...
Bertelli, Biscardi, Blakeslee, Cantiello, Cassisi, Cordier, Dotter, Dotter, Dotter, Ferguson, Ferraro, Freedman, Gonzalez-Lopezlira, Guy Worthey, Hyun-chul Lee, Jensen, John P. Blakeslee, Kim, Lee, Lee, Lee, Lee, Liu, Maraston, Mei, Mucciarelli, Percival, Pietrinferni, Pietrinferni, Raimondo, Raimondo, Reimers, Salasnich, Scalo, Schiavon, Tonry, Tonry, Tonry, Vandenberg, Yi   +39 more
core   +3 more sources

THE s-PROCESS IN ASYMPTOTIC GIANT BRANCH STARS OF LOW METALLICITY AND THE COMPOSITION OF CARBON-ENHANCED METAL-POOR STARS [PDF]

, 2011
We present models for the slow neutron-capture process (s-process) in asymptotic giant branch stars of metallicity [Fe/H] = −2.3 and masses 0.9–6 M☉. We encountered different regimes of neutron-capture nucleosynthesis listed here increasing in importance
M. Lugaro, A. Karakas, R. Stancliffe, Carlos Rijs   +3 more
semanticscholar   +1 more source

Quantum Batteries: A Materials Science Perspective

Advanced Materials, Volume 37, Issue 17, April 28, 2025.
This perspective is focused on advanced materials that might allow the new device class of quantum batteries to be developed. These systems include microcavities with organic molecules, inorganic nanostructures and perovskites, and superconductor circuits.
Andrea Camposeo, Tersilla Virgili, Floriana Lombardi, Giulio Cerullo, Dario Pisignano, Marco Polini   +5 more
wiley   +1 more source

White dwarf planets

EPJ Web of Conferences, 2013
The recognition that planets may survive the late stages of stellar evolution, and the prospects for finding them around White Dwarfs, are growing. We discuss two aspects governing planetary survival through stellar evolution to the White Dwarf stage ...
Bonsor Amy, Veras Dimitri, Villaver Eva, Mustill Alexander J., Wyatt Mark C.   +4 more
doaj   +1 more source