Gaia EDR3 Parallax Zero Point
This repository contains data from the Gaia Early Data Release 3 Data Set. This data set includes observations of stellar clusters made by the Gaia Telescope. This data is then analysed and then displayed in the form of figures, which are located in the plots folder.
The aim of the study is to analyse stellar clusters and determine if there is any systematic error in the GAIA EDR3 stellar cluster parallaxes. If so, how much is this error and what is causing the error.
To clone the project, just copy and paste this (make sure you have git installed on your computer) -
git clone https://github.com/rudrathegreat/Gaia-EDR3-Stellar-Clusters.git .
To make sure that you have the relevant python libraries for the source code to run, download requirements.txt and then run the following command in the terminal -
pip3 install -r requirements.txtIf that does not work, then maybe try the following -
pip install -r requirements.txtThis repository will be using Python 3. There is currently no Python 2 equivalent.
Please refer to the documentation here to learn how the programs work.
Data was used from the .csv files located here. To learn more about the .csv files, click here. Stars were selected based on propermotion among other factors and their data was stored in the .zeropoint.txt files located here. To learn more about what is inside the .zeropoint.txt files and how to analyse them, visit the link here
To see what the results look like, refer to figures 1 and 2 below. These figures are explained in more detail here. Figures similar to figure 1 have been created for each of the stellar clusters analysed.
What we find is that there is a small, systematic error in Gaia's parallax data which is dependent on the colour of the stars.
IC4665, M10, M10, M11, M12, M13, M16, M2, M21, M22, M23, M25, M26, M36, M37, M38, M4, M41, M45, M46, M47, M48, M50, M52, M55, M67, M71, M92, M93, NGC104, NGC129, NGC1502, NGC188, NGC1980, NGC2204, NGC2232, NGC2301, NGC2360, NGC2362, NGC2423, NGC2477, NGC2509, NGC2516, NGC288, NGC3114, NGC3201, NGC3293, NGC3532, NGC362, NGC3766, NGC4372, NGC457, NGC4590, NGC4755, NGC5139, NGC5460, NGC5662, NGC5822, NGC5904, NGC6067, NGC6087, NGC6093, NGC6200, NGC6204, NGC6231, NGC6242, NGC6281, NGC6352, NGC6362, NGC6397, NGC6541, NGC6544, NGC663, NGC6649, NGC6723, NGC6752, NGC6791, NGC6834, NGC6939, NGC6940, NGC7099, NGC7142, NGC7419, NGC752, NGC7789, NGC869, NGC884
If you do notice a bug, make sure to post it in the issues section of the repository and use the bug report template provided. That way, we can quickly and effectively remove the bug from our programs.