Date of Thesis Acceptance
Major Department or Program
This work presents new BV photometric observations of the Ga lactic globular cluster NGC 6712. The observations include an 18 ′ square centered on the cluster with a limiting V magnitude of 21. Heavy field star c ontamination makes NGC 6712 a difficult cluster to study, but simply restrict ing image analysis to a narrow field of view centered on the cluster prov ides enough definition of the cluster color magnitude diagram (CMD) to id entify the red giant and sub-giant branches. This CMD is fit with the Dartmou th Stellar Evolution Program (DSEP) models which determine that NGC 671 2 has an age of 12 ± 1 Gyr, distance modulus of (m − M) V =15.85 ± 0.20, metallicity of [Fe/H]= − 1.10 ± 0.05, and a reddening of E(B − V)=0.41 ± 0.05. These values agree well with previous studies and provide a confirmation o f the accuracy of the DSEP models.
Astronomical photometry -- Observation, Galactic clusters, Stars -- New General Catalogue of Nebulae and Clusters of Stars -- NGC 6712, Horizontal branch stars -- Red giant branch, HR diagrams, Hertzsprung-Russell diagram, Subgiant stars, Stars -- Clusters, Red giants, Color-magnitude diagram, Stellar evolution, Whitman College 2012 -- Dissertation collection -- Astronomy Department
Public Accessible Thesis
If you have questions about permitted uses of this content, please contact the ARMINDA administrator
Schonfeld, Samuel Joseph, "Photometry and isochrone fitting of NSG 6712" (2012). Honors Theses. 152.
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).