Results 11 to 20 of about 25,760 (233)
ASYMPTOTIC GIANT BRANCH VARIABLES
Odessa Astronomical Publications, 2017 Asymptotic Giant Branch variable are the brightest and most distinctive individual stars to be found in the resolved, old and inter mediate age, stellar populations of galaxies in the Local Group and beyond.
P. A. Whitelock
doaj +2 more sources
Backflow in Post-Asymptotic Giant Branch Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 We derive the conditions for a backflow toward the central star(s) of circumstellar material to occur during the post-asymptotic giant branch (AGB) phase. The backflowing material may be accreted by the post-AGB star and/or its companion, if such exists.
Soker, Noam
core +6 more sources
Asymptotic Giant Branch Variables as Extragalactic Distance Indicators [PDF]
Proceedings of the International Astronomical Union, 2012 Large-amplitude asymptotic giant branch variables potentially rival Cepheid variables as fundamental calibrators of the distance scale, particularly if observations are made in the infrared, or where there is substantial interstellar obscuration.
Whitelock, Patricia Ann
core +4 more sources
On Carbon Burning in Super Asymptotic Giant Branch Stars [PDF]
The Astrophysical Journal, 2015 We explore the detailed and broad properties of carbon burning in Super Asymptotic Giant Branch (SAGB) stars with 2755 MESA stellar evolution models.
Farmer, R., Fields, C. E., Timmes, F. X.
core +8 more sources
An HI Imaging Survey of Asymptotic Giant Branch Stars [PDF]
The Astronomical Journal, 2013 We present an imaging study of a sample of eight asymptotic giant branch (AGB) stars in the HI 21-cm line. Using observations from the Very Large Array, we have unambiguously detected HI emission associated with the extended circumstellar envelopes of ...
Bertre, T. Le +3 more
core +9 more sources
Asymptotic Giant Branch predictions: theoretical uncertainties [PDF]
Astronomy & Astrophysics, 2001 In this paper we investigate the level of agreement between observations and "new" Asymptotic Giant Branch (AGB) models, as produced by updating the physical inputs adopted in previous stellar computations. One finds that the new physics increases the predicted luminosity of Horizontal Branch (HB) and AGB stellar structures by a similar amount, keeping
S. Cassisi +4 more
openalex +7 more sources
Heterochrony and Oophagy Underlie the Evolution of Giant Filter-Feeding Lamniform Sharks. [PDF]
Evol DevRetention of juvenile craniofacial characteristics by paedomorphosis (heterochrony) may have facilitated the evolution of gigantism in filter‐feeding lamniform sharks, by increasing the efficiency of prey acquisition. ABSTRACT Evolutionary transitions toward gigantic body sizes have profound consequences for the structure and dynamics of ecological ...
Gayford JH +3 more
europepmc +2 more sources
Surfing the T Wave: A Primer on ECG T Wave Morphologies Encountered in Clinical Trials and Impact on the QT Interval and Patient Safety. [PDF]
Clin Transl SciABSTRACT Electrocardiogram (ECG) interpretation and measurement is an essential aspect of patient safety and pharmacovigilance in clinical trials. Changes in the T wave segment of an ECG can provide both diagnostic and prognostic information and may be affected by a variety of intrinsic and extrinsic factors related to drug administration.
Lester RM, Paglialunga S.
europepmc +2 more sources
The Asymptotic Giant Branch [PDF]
Symposium - International Astronomical Union, 1997 For stars with masses between about 1 and 8 M⊙ the ascent of the Asymptotic Giant Branch (AGB) is the last nuclear powered evolutionary stage. Following this the stars eject a planetary nebula and fade as white dwarfs. Although only short in duration, the AGB is very important due to the nucleosynthesis which occurs.
John C. Lattanzio, Cheryl A Frost
openaire +2 more sources
Magnetic Mixing in Red Giant and Asymptotic Giant Branch Stars [PDF]
The Astrophysical Journal, 2008 The available information on isotopic abundances in the atmospheres of low-mass Red Giant Branch (RGB) and Asymptotic Giant Branch (AGB) stars requires that episodes of extensive mixing occur below the convective envelope, reaching down to layers close to the hydrogen burning shell (Cool Bottom Processing).
Jason Nordhaus +4 more
openalex +7 more sources