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Topic: Asymptotic giant branch

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	asymptotic giant branch (AGB)
		It is occupied by evolved stars of low to intermediate mass (0.4 to 10 solar masses) that have a dormant, helium-filled core surrounded by a helium-fusing shell, on top of which lies a hydrogen-fusing shell.
		Somewhat confusingly, although AGB stars do not lie on the red giant branch, they are often referred to as being red giants because they are large and red in color.
		As the star climbs the AGB, it becomes a pulsating variable of the type known as a Mira variable.
	www.daviddarling.info /encyclopedia/A/AGB.html (368 words)

	Asymptotic Giant Branch evolution at varying surface C/O ratio: effects of chang
		Asymptotic Giant Branch evolution at varying surface C/O ratio: effects of chang
		Asymptotic Giant Branch evolution at varying surface C/O ratio: effects of changes in molecular opacities
		Finally, we mention other possibly important evolutionary and observational effects that result from the adoption of the variable opacities, such as: i) significant shortening of the C-star phase due to the earlier onset of the super-wind; ii) consequent reduction of the carbon yields iii) reproduction of the observed range of near-infrared colours of C-stars.
	www.adsabs.harvard.edu /cgi-bin/nph-bib_query?bibcode=2002A&A...387..507M&db_key=AST (327 words)

	Asymptotic Giant Branch -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-06)
		The Asymptotic Giant Branch is the name given to a region of the (additional info and facts about Hertzsprung-Russell Diagram) Hertzsprung-Russell Diagram populated by evolving low to medium-mass ((astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior) stars.
		When a star exhausts the supply of (A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe) hydrogen in its core, the core contracts and its temperature increases, causing the outer layers of the star to expand and cool.
		Its path is almost aligned with its previous (additional info and facts about red giant track) red giant track, hence the name of (additional info and facts about Asymptotic) Asymptotic Giant Branch.
	www.absoluteastronomy.com /encyclopedia/a/as/asymptotic_giant_branch.htm (272 words)

	ipedia.com: Red giant Article (Site not responding. Last check: 2007-11-06)
		According to the Hertzsprung-Russell diagram, a red giant is a large non- main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler "giants".
		According to the Hertzsprung-Russell diagram, a red giant is a large non-main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler "giants".
		Stars may enter a red giant phase several times if they are capable of burning elements more massive than helium in their cores.
	www.ipedia.com /red_giant.html (306 words)

	Asymptotic Giant Branch Stars at Quantum Books
		This book deals with the underlying astrophysical mechanisms of the objects known as asymptotic giant branch stars -- the structures that occur during the dramatic period prior to a star's death.
		Over the past three decades, asymptotic giant branch stars have become a topic of their own, and the contributions to this volume all focus on these entities themselves, rather than their connections to other fields of astronomy.
		This collection should be useful to graduate students who work in the field, teachers who want to address the subject in their courses, and to astronomers from various backgrounds who are interested in the astrophysics of AGB stars.
	www.quantumbooks.com /p/14ASTR/0387008802 (144 words)

	First Detection of Rubidium in Asymptotic Giant Branch Stars
		A long debated issue concerning the nucleosynthesis of neutron-rich elements in Asymptotic Giant Branch (AGB) stars is the identification of the neutron source.
		Because huge amounts of rubidium-rich processed material can be transferred to the interestellar medium by massive AGB stars, this result has also relevant implications for the rubidium primeval solar nebula abundance.
		Rubidium line at 7800 angstroms as detected by UES spectrograph on the William Herschel Telescope in BW Cam, one of observed AGB stars in this study.
	www.ing.iac.es /PR/press/rb.html (190 words)

	AGB News - Home (Site not responding. Last check: 2007-11-06)
		The AGB Newsletter invites contributions related to Asymptotic Giant Branch stars; dealing with their structure, behaviour, evolution or mass loss, with their impact on the dynamical and chemical evolution of galaxies or their use as tracers of intermediate-age populations.
		Contributions may include papers submitted or accepted for publication in refereed journals or conference proceedings, thesis abstracts, conference or job announcements, or other scientific communications.
		View the current or past issues of the AGB Newsletter.
	www.astro.keele.ac.uk /AGBnews (156 words)

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