Results 71 to 80 of about 22,085 (227)

Observations of Molecular CN toward S-type Asymptotic Giant Branch Stars

The Astronomical Journal
S-type asymptotic giant branch (AGB) stars are defined by their carbon-to-oxygen (C/O) ratio approaching unity. However, observations of circumstellar molecules in these stars are limited and challenging.
Yanan Feng, Xiaohu Li, Xiaofeng Yang, Tom J. Millar, Ryszard Szczerba, Sheng-Li Qin, Xuejian Jiang, Donghui Quan, Juan Tuo, Zhenzhen Miao, Sheng-Yuan Liu, Xiang Liu   +11 more
doaj   +1 more source

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

Spitzer observations of large amplitude variables in the LMC and IC 1613

EPJ Web of Conferences, 2017
The 3.6 and 4.5 ìm characteristics of asymptotic giant branch variables in the LMC and IC 1613 are discussed. For C-rich Mira variables there is a very clear periodluminosity-colour relation, where the [3.6] .
Whitelock Patricia A., Kasliwal Mansi, Boyer Martha   +2 more
doaj   +1 more source

CARBON-RICH DUST PAST THE ASYMPTOTIC GIANT BRANCH: ALIPHATICS, AROMATICS, AND FULLERENES IN THE MAGELLANIC CLOUDS [PDF]

, 2014
Infrared spectra of carbon-rich objects that have evolved off the asymptotic giant branch reveal a range of dust properties, including fullerenes, polycyclic aromatic hydrocarbons (PAHs), aliphatic hydrocarbons, and several unidentified features ...
G. Sloan, E. Lagadec, A. Zijlstra, K. Kraemer, A. P. Weis, A. P. Weis, M. Matsuura, K. Volk, E. Peeters, E. Peeters, W. Duley, J. Cami, J. Cami, J. Bernard-Salas, F. Kemper, R. Sahai   +15 more
semanticscholar   +1 more source

Blueprint for a Universal Theory of Learning to Read: The Combinatorial Model

Reading Research Quarterly, Volume 60, Issue 2, April/May/June 2025.
The Reading Tree. Abstract In this essay, I outline some of the essential ingredients of a universal theory of reading acquisition, one that seeks to highlight commonalities while embracing the global diversity of languages, writing systems, and cultures.
David L. Share
wiley   +1 more source

Pulsating stars in the VMC survey

EPJ Web of Conferences, 2017
The VISTA survey of the Magellanic Clouds system (VMC) began observations in 2009 and since then, it has collected multi-epoch data at Ks and in addition multi-band data in Y and J for a wide range of stellar populations across the Magellanic system ...
Cioni Maria-Rosa L., Ripepi Vincenzo, Clementini Gisella, Groenewegen Martin A.T., Moretti Maria I., Muraveva Tatiana, Subramanian Smitha   +6 more
doaj   +1 more source

EVOLUTION AND NUCLEOSYNTHESIS OF ASYMPTOTIC GIANT BRANCH STELLAR MODELS OF LOW METALLICITY [PDF]

, 2014
We present stellar evolutionary tracks and nucleosynthetic predictions for a grid of stellar models of low- and intermediate-mass asymptotic giant branch (AGB) stars at Z = 0.001 ([Fe/H] =−1.2).
C. Fishlock, A. Karakas, M. Lugaro, D. Yong   +3 more
semanticscholar   +1 more source

Topographic Drag at the Core‐Mantle Interface

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract The length of day variations with periods from five to one hundred years are mainly due to core‐mantle interactions. Assuming a differential velocity between the core and the mantle, we investigate the pressure coupling on a core‐mantle boundary (CMB) interface with topography. Including rotation, buoyancy, and magnetic effects in local models
R. Monville, D. Cébron, D. Jault
wiley   +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

An Interview With Peter Rousseeuw

International Statistical Review, Volume 93, Issue 1, Page 1-17, April 2025.
Summary Peter J. Rousseeuw is a statistician known mainly for his work on robust statistics and cluster analysis. Among his creations are least trimmed squares regression, the minimum covariance determinant estimator, the partitioning around medoids clustering method and the silhouettes graphical display.
Mia Hubert
wiley   +1 more source