CMD Data Project
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University of Toronto *
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221
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Astronomy
Date
Jan 9, 2024
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docx
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Uploaded by EarlPheasant3869
CMD Data Project
Hipparcos CMD of the local stellar neighbourhood
Figure 1 Description: V magnitude vs. B-V colour CMD Scatter Plot
Figure 2 Description: Parallax Histogram
Figure 3 Description: Corrected Color Magnitude Plot with Sun Parker
Figure 4: ZAMS Plot
What do you notice about the alignment of the data in your CMD and the ZAMS?
As I examine the Color-Magnitude Diagram (CMD) or Hertzsprung-Russell diagram
of the stellar population, I notice a notable alignment of data points along the Zero-Age
Main Sequence (ZAMS). The ZAMS represents stars that are actively burning hydrogen
in their cores and are in the prime of their main sequence lives. The majority of stars in
the population seem to follow the well-defined main sequence, indicating that they are
currently engaged in hydrogen fusion. This alignment is expected, as most stars spend
the majority of their lifespan on the main sequence. I think my plot is a bit distorted
when I placed in the ZAMs line, so most of my points lie quite a bit above the line,
however it still follows all the trends we would expect to see.
Do you see evidence of stars evolving off the main sequence? Why or why not?
Yes, in the Color-Magnitude Diagram (CMD) or Hertzsprung-Russell diagram that I'm
examining, there is clear evidence of stars evolving off the main sequence. The main sequence
on the diagram represents stars that are actively burning hydrogen in their cores, and this is
reflected in a distinct, diagonal band.
Section 2: Gaia data for the Hyades cluster
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Figure 1: Parallax Value Histogram
Figure 2: Proper Motion Diagram
Name
limits
mean
parallax
and
standard
deviation
mean
distance
and
distance
uncertainty