The Swallowing of Planets by Giant Stars (2007)
We present simulations of the accretion of a massive planet or brown dwarf by an AGB star. In our scenario, close planets will be engulfed by the star, spiral-in and be dissipated in the...
The Accretion of Brown Dwarfs and Planets by Giant Stars (2007)
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...
The Planets-Capture Model of V838 Monocerotis (2006)
Retter, Alon, Zhang, Bing, Siess, Lionel, Levinson, Amir, Marom, Ariel
The planets capture model for the eruption of V838 Mon is discussed. We used three methods to estimate the location where the planets were consumed. There is a nice consistency for the results of the...
Retter, Alon, Zhang, Bing, Siess, Lionel, Levinson, Amir
V838 Mon is the prototype of a new class of objects. Understanding the nature of its multi-stage outburst and similar systems is challenging. So far, several scenarios have been invoked to explain...
Deroo, Pieter, Reyniers, Maarten, Van Winckel, Hans, Goriely, Stephane, Siess, Lionel
This paper reports the detection of a heavy element enriched RV Tauri variable with an abundance pattern that differs significantly from a standard s-process enriched object: V453 Oph. Based on...
How to reconcile the C and s-process abundances in the metal-poor star V453 Oph ? (2004)
Deroo, Pieter, Goriely, Stephane, Siess, Lionel, Reyniers, Maarten, Van Winckel, Hans
In this poster we present a detailed chemical analysis of the RV Tauri star of low intrinsic metallicity, V453 Oph ([Fe/H]=-2.2), which shows a mild but clear s-process surface overabundance. This...
Structure, Evolution and Nucleosynthesis of Primordial Stars (2002)
Siess, Lionel, Livio, Mario, Lattanzio, John
(abridge version) The evolution of population III stars (Z=0) is followed from the pre-main sequence phase up to the AGB phase for intermediate-mass stars and up to C ignition in more massive...
Nucleosynthesis of s-elements in zero-metal AGB stars (2001)
Goriely, Stephane, Siess, Lionel
Contrary to previous expectations, recent evolutionary models of zero-metallicity stars show that the development of mixing episodes at the beginning of the AGB phase allows low- and...
This paper extends our previous study of planet/brown dwarf accretion by giant stars to solar mass stars located on the red giant branch. The model assumes that the planet is dissipated at the bottom...
The Accretion of Brown Dwarfs and Planets by Giant Stars -- I. AGB Stars (1998)
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...
The Swallowing of Planets by Giant Stars (1998)
We present simulations of the accretion of a massive planet or brown dwarf by an AGB star. In our scenario, close planets will be engulfed by the star, spiral-in and be dissipated in the ``accretion...