Sponsoring Teacher: Tabatha Woy
Research Mentor: Sue Ann Heatherly, National Radio Astronomy
and Blue Shifts
The objective of this project is to determine the amount, velocity (also
the direction. If it is approaching earth it is a blue shift and the
opposite is a red shift), and the number of the HI molecules in the
galactic plane that has the right ascension of 00:23:00-1:00:00 and
declination of 31.
My hypothesis is that since 00:23:00-1:00:00
is only a little more than a half hour, the velocity should have either
a positive or a negative correlation. Also, I believe that the amount of
HI through the given right ascension should be dealing with red shifts
becoming blue shifts by looking at the data. I also surmise the amount
of HI will have no say in anything.
Procedures: These apply to every peak on each set of
data: First I found the frequency of the all the peaks in MHz. Then, I
applied the frequency in the following equation-
c x (1420.41- observed frequency)/1420.41
velocity and c= 300,000 km/s (speed of light). If the answer is
negative, a red shift is happening and if there is a positive answer, a
Then, I found the area of
the peak by using this equation –
Velocity (km/s) x Antenna T. (K)
Then, I applied the last
equation to find the amount of HI atoms in cm squared-
The area (in units of (km/sec)(K) x a constant =
number of H atoms/cm2
The results were that the velocity increased
drastically between 23 and 34 but then only increases a little, but the
amount of HI has no correlation with any variable.
My hypothesis was correct! The velocity increased an
incredible 10 km/s between 26 and 34 right ascension. But after that,
the velocity only increased a fraction of an amount every 7 minutes.
However, the amounts of HI atoms have no correlation with the right
ascension or velocity whatsoever. Using this data we can surmise that
the HI atoms have no say in the velocity.