Dynamical Substructures of Galactic Globular Clusters III. NGC 7006

• Main Authors: Jonghwan Rhee, Young-Jong Sohn
• Format: Article
• Language: English
• Published: Korean Space Science Society (KSSS) 2005-12-01
• Series: Journal of Astronomy and Space Sciences
• Subjects: globular cluster; NGC 7006; dynamical substructure
• Online Access: http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2005/v22n4/OJOOBS_2005_v22n4_363.pdf

To study the effects of giant population on dynamical substructures of the central region of NGC 7006, we examine the radial variations of ellipticity and position angle on BV stellar photometry using ellipse fitting technique. Total variations of ellipticity and position angle lie in the range 0.02˜0.06 and -10° ˜ +90°, respectively, from the center out to three times the half light radius. Our ellipse fitting results, after removing giant populations, show that the apparent central dynamical substructures of NGC 7006 are mainly affected by red giant, horizontal branch stars. On the contrary, the contribution of light from subgiant stars to the inner dynamical substructure seems to be insignificant.