Results 91 to 100 of about 2,111 (247)
Dance to Demise—How Massive Stars May Form Dense Circumstellar Shells before Explosion
The Astrophysical JournalWe investigate the evolution of red supergiant (RSG) progenitors of core-collapse supernovae (SNe) with initial masses between 12 and 20 M _⊙ , focusing on the effects of enhanced mass loss due to pulsation-driven instabilities in their envelopes and ...
Sutirtha Sengupta +2 more
doaj +1 more source
Pulsating star research from Antarctica
EPJ Web of Conferences, 2017 This invited talk discusses the pulsating star research from the heart of Antarctica and the scientific polar challenges in the extreme environment of Antarctica, and how the new polar technology could cope with unresolved stellar pulsation enigmas and ...
Chadid Merieme
doaj +1 more source
The Cepheid mass discrepancy and pulsation-driven mass loss
, 2011 Context. A longstanding challenge for understanding classical Cepheids is the Cepheid mass discrepancy, where theoretical mass estimates using stellar evolution and stellar pulsation calculations have been found to differ by approximately 10−20%.
Astrophysics +8 more
core +1 more source
A 17 Year Old With Developmental Delay Presenting With Increasing Confusion and Imbalance
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Methylmalonic acidemia is an autosomal recessive genetic disorder primarily caused by defects in methylmalonyl‐CoA mutase and cobalamin (vitamin B12) metabolism. These defects disrupt the tricarboxylic acid cycle and oxidative phosphorylation, leading to the abnormal accumulation of metabolic products such as methylmalonic acid, propionic acid,
Wei Zhao, Yingli Zhang, Hongliang Zheng
wiley +1 more source
The Cepheid Distance Scale: Recent Progress in Fundamental Techniques [PDF]
, 2009 This review examines progress on the Pop I, fundamental-mode Cepheid distance scale with emphasis on recent developments in geometric and quasi-geometric techniques for Cepheid distance determination. Specifically I examine the surface brightness method,
Thomas G. Barnes +3 more
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Some Remarks on Stellar Pulsation [PDF]
International Astronomical Union Colloquium, 2000 AbstractI wondered at first why I had been asked to perform the task of commenting on the scientific discussion of this meeting, until a member of the Scientific Organising Committee pointed out to me that I have not published a serious paper on the subject of the colloquium in his memory (I am not sure whether this is more a statement of the ...
openaire +1 more source
Arthritis Care &Research, EarlyView.Objective Sjögren's disease is an autoimmune disorder that can impact multiple organ systems, including the peripheral nervous system (PNS). PNS manifestations, which can exist concurrently, include mononeuropathies, polyneuropathies, and autonomic nervous system neuropathies.
Anahita Deboo +88 more
wiley +1 more source
PAIX Across the HR Diagram New Antarctica Photometer for Stellar Pulsation and Site Testing
, 2007 PAIX, acronym for Photometer AntarctIc eXtinction, is a new photometer which has just been installed at Dome C in December 2006. PAIX consists of a 40 cm telescope equipped with a KAF-0401E CCD detector.
M. Azouit +5 more
core +1 more source
Modeling of Two Low-amplitude Radially Pulsating δ Scuti Stars: KIC 12602250 and KIC 5768203
The Astrophysical JournalIn this research, we conducted systematic photometric, spectroscopic, and theoretical modeling analyses of two δ Scuti stars—KIC 12602250 and KIC 5768203—that pulsate only in radial modes.
Shuguo Ma +19 more
doaj +1 more source
Three-equation turbulent convection models in classical variables
Astronomy & AstrophysicsContext. Turbulent convection models in nonlinear radial stellar pulsation models rely on an extra equation for turbulent kinetic energy and fail to adequately explain mode-selection problems.
Kovács Gábor B. +2 more
doaj +1 more source