Globular clusters

[Little Bang]

Anyone have information on the evolution of globular clusters?

[REASON]

Anyone have information on the evolution of globular clusters?

 

Here's something that might have some information you're looking for.

 

I found it in a Google Scholar search.

 

SUPERGIANT MOLECULAR CLOUDS AND THE FORMATION OF GLOBULAR CLUSTER SYSTEMS

[Little Bang]

Thank you REASON, that was very helpful.

[Pluto]

G'day from the land of ozzzzzzz

 

I had this link in the comp.

 

I hope it is of interest to you.

 

I have more, but! I have to run.,,,,,,,,,,

 

[astro-ph/0103256] Cosmological Evolution of Supergiant Star-Forming Clouds

Cosmological Evolution of Supergiant Star-Forming Clouds

 

Authors: Melinda L. Weil (McMaster University, City University of New York), Ralph E. Pudritz (McMaster University)

(Submitted on 16 Mar 2001)

 

Abstract: In an exploration of the birthplaces of globular clusters, we present a careful examination of the formation of self-gravitating gas clouds within assembling dark matter haloes in a hierarchical cosmological model. Our high-resolution smoothed particle hydrodynamical simulations are designed to determine whether or not hypothesized supergiant molecular clouds (SGMCs) form and, if they do, to determine their physical properties and mass spectra. It was suggested in earlier work that clouds with a median mass of several 10^8 M_sun are expected to assemble during the formation of a galaxy, and that globular clusters form within these SGMCs. Our simulations show that clouds with the predicted properties are indeed produced as smaller clouds collide and agglomerate within the merging dark matter haloes of our cosmological model. We find that the mass spectrum of these clouds obeys the same power-law form observed for globular clusters, molecular clouds, and their internal clumps in galaxies, and predicted for the supergiant clouds in which globular clusters may form. We follow the evolution and physical properties of gas clouds within small dark matter haloes up to z = 1, after which prolific star formation is expected to occur. Finally, we discuss how our results may lead to more physically motivated "rules" for star formation in cosmological simulations of galaxy formation.

[coldcreation]

Anyone have information on the evolution of globular clusters?

 

Here's a nice pic Little B:

 

http://apod.nasa.gov/apod/ap080402.html

 

 

Try this too:

 

YouTube - Hubble Source | Globular Cluster http://www.youtube.com/watch?v=2A-Y6LQDN2A

 

 

Or this one:

 

YouTube - Hubblecast 15: Black hole found in Omega Centauri http://www.youtube.com/watch?v=6v9QtncWb00&feature=related

 

 

 

CC

[Pluto]

G'day from the land of ozzzzz

 

Hello Coldcreation

 

APOD was a good idea.

 

APOD Search Results for "Globular clusters"

[Little Bang]

CC, that second video was extremely interesting because it suggests a way to explain how globulars have some stars that are older than the parent spiral galaxy. I think it answers the purpose of this thread. Thank you all for your response.

[Pluto]

G'day from the land of ozzz

 

AGE

 

What is age of a star or a galaxy?

 

How do they age something that evolves and rejuvinates, ejecting matter and collecting matter and compacting matter and so on?

[maddog]

What is age of a star or a galaxy?

How do they age something that evolves and rejuvinates, ejecting matter and collecting matter and compacting matter and so on?

Age of a Star is totally determined by how big the star is observed to be, the classification on the HR diagram to estimate how much material to burn is left.

 

Age of a Galaxy is more an estimate. Mostly estimate of what population most of the stars are. Galaxies further away are older. Older galaxies will have more Pop II and for oldest even Pop III stars.

 

Not all has been worked out in the evolution of Galaxies.

 

maddog

[Pluto]

G'day Maddog

 

So ! age basically means the age of the stage of phase, but! not the actual age.