Results 31 to 40 of about 15,412 (318)

On the Impact of Helium Content on the RR Lyrae Distance Scale [PDF]

open access: yes, 2018
Indexación: Scopus.We constructed new sets of He-enhanced (Y = 0.30, Y = 0.40) nonlinear, time-dependent convective hydrodynamical models of RR Lyrae (RRL) stars covering a broad range in metal abundances (Z = 0.0001-0.02).
Bono, G.   +5 more
core   +3 more sources

Dynamic atmospheres and winds of cool luminous giants, I. Al$_2$O$_3$ and silicate dust in the close vicinity of M-type AGB stars

open access: yes, 2016
High spatial resolution techniques have given valuable insights into the mass loss mechanism of AGB stars, which presumably involves a combination of atmospheric levitation by pulsation-induced shock waves and radiation pressure on dust.
Ahuja, Rajeev   +3 more
core   +1 more source

Strange pulsation modes in luminous red giants [PDF]

open access: yes, 2014
We show that the spectrum of radial pulsation modes in luminous red giants consists of both normal modes and a second set of modes with periods similar to those of the normal modes.
Olivier, E. A., Wood, P. R.
core   +3 more sources

Preface

open access: yesEPJ Web of Conferences, 2017
The 22nd edition of the Los Alamos Stellar Pulsation Conference Series was held in San Pedro de Atacama, northern Chile, between Nov. 28 and Dec. 2, 2016. Here is a short description of the event.
Catelan Márcio, Gieren Wolfgang
doaj   +1 more source

Dust-driven winds of AGB stars: The critical interplay of atmospheric shocks and luminosity variations

open access: yes, 2016
Winds of AGB stars are thought to be driven by a combination of pulsation-induced shock waves and radiation pressure on dust. In dynamic atmosphere and wind models, the stellar pulsation is often simulated by prescribing a simple sinusoidal variation in ...
Eriksson, K.   +3 more
core   +1 more source

Double-Mode Stellar Pulsations [PDF]

open access: yes, 2001
34 pages, to appear as a chapter in Nonlinear Stellar Pulsation in the Astrophysics and Space Science Library (ASSL), Editors: M. Takeuti & D. Sasselov (prints double column with pstops '2:0L@.9(22.0cm,-2cm)+1L@.9(22.0cm,11.0cm)' in.ps out.ps)
Kollath, Zoltan, Buchler, J. Robert
openaire   +2 more sources

Stellar Pulsation and Evolution: A Combined Theoretical Renewal and Updated Models (SPECTRUM). I. Updating Radiative Opacities for Pulsation Models of Classical Cepheid and RR-Lyrae

open access: yesThe Astrophysical Journal
Pulsating stars are universally recognized as precise distance indicators and tracers of stellar populations. Their variability, combined with well-defined relationships between pulsation properties and intrinsic evolutionary parameters such as ...
Giulia De Somma   +3 more
doaj   +1 more source

Pulsation models of O-rich and C-rich long period variables

open access: yesEPJ Web of Conferences, 2017
The intrinsic variability of luminous red giants is an observable providing important information about stellar structure and evolution. Our aim is to provide a solid theoretical background to the wide amount of data coming from present and future ...
Trabucchi Michele   +4 more
doaj   +1 more source

The role and implications of mammalian cellular circadian entrainment

open access: yesFEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source

Benchmarking Differential Reddening in Front of Globular Clusters

open access: yesThe Astronomical Journal
Interstellar extinction is a major obstacle in determining accurate stellar parameters from photometry near the Galactic disk. It is especially true for globular clusters at low galactic latitudes, which suffer from significant amounts of spatially ...
Csilla Kalup, László Molnár
doaj   +1 more source

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