Results 41 to 50 of about 3,760 (219)
The accretion of brown dwarfs and planets by giant stars -- I. Asymptotic giant branch stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 We study the response of the structure of an asymptotic giant branch (AGB) star to the accretion of a brown dwarf or planet in its interior. In particular, we examine the case in which the brown dwarf spirals-in, and the accreted matter is deposited at the base of the convective envelope and in the thin radiative shell surrounding the hydrogen burning ...
Siess, Lionel, Livio, Mario
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Submillimetre photometry of post-asymptotic giant branch stars [PDF]
, 2002 Stars in the post-asymptotic giant branch (post-AGB) phase of evolution are surrounded by detached circumstellar envelopes containing dust which emits thermally in the mid- and far-infrared. Here we present 850-mum SCUBA photometry of nine candidate post-
Yates, JA, Gledhill, TM, Bains, I
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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
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Asymptotic Giant Branch Stars [PDF]
, 2004 Preface Chapter 1: Introduction: H.J. Habing and H. Olofsson N.B.: This chapter is not yet completed! 1.1 Bits of history 1.2 The structure of AGB stars 1.3 Observational characteristics of AGB stars 1.4 Distinctive properties of AGB stars Chapter 2: Evolution, Nucleosynthesis and Pulsation: P. Wood and J. Lattanzio 2.1 Basic observational properties 2.
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Mass loss of stars on the asymptotic giant branch [PDF]
The Astronomy and Astrophysics Review, 2018 As low- and intermediate-mass stars reach the asymptotic giant branch (AGB), they have developed into intriguing and complex objects that are major players in the cosmic gas/dust cycle. At this stage, their appearance and evolution are strongly affected by a range of dynamical processes. Large-scale convective flows bring newly-formed chemical elements
Susanne Höfner, Hans Olofsson
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Planetary nebulae: a key tool to reconstruct the evolutionary history of stars
Frontiers in Astronomy and Space SciencesPlanetary nebulae, among the most fascinating objects in the sky, have been extensively investigated in the past years, because their study provides important information on the low and intermediate mass stellar populations of the host environment ...
Paolo Ventura +3 more
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Isotopic Enrichment of Planetary Systems from Asymptotic Giant Branch Stars
The Astrophysical Journal Letters, 2023 Short-lived radioisotopes, in particular ^26 Al and ^60 Fe, are thought to contribute to the internal heating of the Earth, but are significantly more abundant in the solar system compared to the interstellar medium.
Richard J. Parker, Christina Schoettler
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Noble gases and nitrogen in material from asteroid Bennu
Meteoritics &Planetary Science, EarlyView.Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty +7 more
wiley +1 more source
Large Deviations of the Giant Component in Scale‐Free Inhomogeneous Random Graphs
Random Structures &Algorithms, Volume 68, Issue 4, July 2026.ABSTRACT We study large deviations of the size of the largest connected component in a general class of inhomogeneous random graphs with iid weights, parametrized so that the degree distribution is regularly varying. We derive a large‐deviation principle with logarithmic speed: the rare event that the largest component contains linearly more vertices ...
Joost Jorritsma, Bert Zwart
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The Production of Germanium in Asymptotic Giant Branch stars [PDF]
Proceedings of International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IX — PoS(NIC-IX), 2010 Observations of planetary nebulae by Sterling, Dinerstein and Bowers have revealed enhancements in the element Germanium (Ge) by factors of 3 to 10 compared to solar. Germanium can be produced by slow-neutron capture (s-process) in asymptotic giant branch (AGB) stars.
Amanda Karakas +2 more
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