Study of Age, Metallicity, and Extra-Tidal Region of a Globular Cluster NGC 4147

This project was carried out as part of the course PH-EL64: Observational Astronomy Lab in the MSc Physics curriculum at the Department of Physics and Astrophysics, University of Delhi.

Authors

• Anisha Khatri
• Khushi Gupta
• Simran Kumari

Objective

• To study the age, metallicity, and extra-tidal region of the globular cluster NGC 4147 using data from Gaia DR3.
• To identify extra-tidal candidates based on cluster and stellar proper motions, and their positions on the color–magnitude diagram.
• Analyze the spatial distribution of these stars to understand the cluster’s dynamical history within the Milky Way.

Prerequisites

To run this project locally, ensure you have the following Python libraries installed:

pip install numpy pandas matplotlib scipy astropy

Usage

Clone this repository and open the Jupyter notebook named ObsAstroLab (1).ipynb. Run the notebook cells in sequence to follow the full data analysis and visualization pipeline.

Project Workflow

1. Introducing Globular Clusters
   
2. Problem Statement
   
3. Data Acquisition
   
4. Data Analysis and Methodology
    ‣ 4.1 Data Reduction
    ‣ 4.2 Proper Motion Selection
    ‣ 4.3 Membership Probability
    ‣ 4.4 Color-Magnitude Diagram
    ‣ 4.5 Isochrone Fitting
    ‣ 4.6 Density Map
    ‣ 4.7 Orbit of the Cluster
   
5. Conclusions

Contact

For any queries, feel free to reach out:

Email: khatri.anisha20@gmail.com
LinkedIn: https://linkedin.com/AnishaKhatri