Shapley–Sawyer Concentration Class

In this article, we will delve into the fascinating topic of Shapley–Sawyer Concentration Class, exploring its origins, evolution and relevance in today's society. Since its inception, Shapley–Sawyer Concentration Class has played a crucial role in various aspects of everyday life, influencing everything from culture and the arts to technology and economics. Over the years, Shapley–Sawyer Concentration Class has undergone significant changes, adapting to new paradigms and challenges that have arisen over time. Through a deep and detailed analysis, we will discover the many facets of Shapley–Sawyer Concentration Class and its impact on the contemporary world, as well as the different perspectives that exist around this important topic.

The Shapley–Sawyer Concentration Class is a classification system on a scale of one to twelve using Roman numerals for globular clusters according to their concentration. The most highly concentrated clusters such as M75 are classified as Class I, with successively diminishing concentrations ranging to Class XII, such as Palomar 12. (The class is sometimes given with numbers rather than with Roman numerals.)

From 1927 to 1929, Harlow Shapley and Helen Sawyer Hogg began categorizing clusters according to the degree of concentration the system has toward the core using this scale. This became known as the Shapley–Sawyer Concentration Class.[1]

Classes

Class Description Example
I High concentration toward the center
Messier 75
II Dense central concentration
Messier 2
III Strong inner core of stars
Messier 54
IV Intermediate rich concentrations
Messier 15
V Intermediate concentrations
Messier 30
VI Intermediate mild concentration
Messier 3
VII Intermediate loose concentration
Messier 22
VIII Rather loosely concentrated towards the center
Messier 14
IX Loose towards the center
Messier 12
X Loose
Messier 68
XI Very loose towards the center
Messier 55
XII Almost no concentration towards the center
Palomar 12

[2]

References

  1. ^ Hogg, Helen Battles Sawyer (October 1965). "Harlow Shapley and Globular Clusters". Publications of the Astronomical Society of the Pacific. 77 (458): 336–46. Bibcode:1965PASP...77..336S. doi:10.1086/128229. JSTOR 40674226.
  2. ^ Burton, Jeff (July 26, 2011). "Shapley–Sawyer Globular Cluster Concentration Class". Archived from the original on March 22, 2012.


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