The horizontal branch morphology in globular clusters: consequences for the self-pollution model

Details The horizontal branch morphology in globular clusters: consequences for the self-pollution model The horizontal branch morphology in globular clusters: consequences for the self-pollution model

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13r.156d&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

Globular Clusters, Horizontal Branch

Scientific paper

There is now a growing agreement about the primordial nature of many -if not all- of the inhomogeneities in the chemical composition of globular cluster stars. The best candidates to produce ""self- pollution"" are identified with the matter lost in winds of low velocity from Asymptotic Giant Branch (AGB) stars especially of high mass evolving during the first phases of life of the Clusters. Nevertheless the modalities of selfpollution till now explored (1)mass exchange in wide binaries 2)accretion on already formed stars 3)ongoing star formation lasting for long enough that the remnant gas could be contaminated by the AGB ejecta) are not satisfactory. I will discuss the (new) hypothesis that one or several new generations of stars are formed directly from the AGB ejecta. This hypothesis (originally based on the correlation between some horizontal branch morphologies - especially the existence of blue tails - and chemical spreads) provides a useful and conceptually simple key to interpret the horizontal branch peculiarities (e.g. some of its gaps) and the distribution of abundance anomalies. If the model is correct in the end we can use the abundance anomalies to falsify (or calibrate) our AGB models.

Affiliated with

Also associated with

No associations

Rating

The horizontal branch morphology in globular clusters: consequences for the self-pollution model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The horizontal branch morphology in globular clusters: consequences for the self-pollution model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The horizontal branch morphology in globular clusters: consequences for the self-pollution model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-807099