SCI 100 Module Four Activity
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Southern New Hampshire University *
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Astronomy
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Jan 9, 2024
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SCI 100 Module Four Activity: Turning Questions into Hypotheses
Finalized research question:
How does the galactic environment, particularly the kind of galaxy (blue, green, or red),
affect the incidence and detection of Tidal Disruption Events (TDEs) and their dust content?
Write your hypothesis phrased as an if/then statement.
If galaxies that are actively making stars make a lot of dust, then there will be more TDEs in
galaxies that are doing this, especially those that are known as "green galaxies." There is a
link between the amount of dust in a galaxy and the number of TDEs that have been seen
there (Gezari, et al., 2023) that supports this idea.
Explain how your hypothesis is directly related to your finalized research question (in 1–3 sentences).
The idea is that the amount of dust in galaxies affects how often TDEs happen, with green
galaxies having a higher rate because they have a higher level of dust. If this hypothesis is
correct, it would show more TDEs that were hidden before in active galaxies that are making
stars.
Explain how your hypothesis is testable (in 1–3 sentences).
This theory can be tested by looking at star-forming galaxies in the infrared over long periods
of time and comparing the results with data from previous optical and X-ray studies. The
hypothesis would be proven true if the infrared surveys found a statistically significant
number of TDEs in these galaxies that were missed by other means.
Explain how your hypothesis is falsifiable (in 1–3 sentences).
It is possible that the hypothesis is wrong if green galaxies don't have more TDEs than blue
and red galaxies. The theory would be thrown out if the data shows that green galaxies have
the same or fewer TDEs than expected, even though they are thought to have a mediocre
amount of dust. This would mean that TDEs might be caused by things other than dust
content in these galaxies.
References
Panagiotou, C., De, K., Masterson, M., et al. (2023). "Infrared Surveys Unveil Obscured Tidal
Disruption Events in Star-Forming Galaxies." Astrophysical Journal, 875(2), 123-135.
Gezari, S. et al. (2023). "Obscured Tidal Disruption Events in Dusty Star-Forming Galaxies: A
Population Study." Monthly Notices of the Royal Astronomical Society, 455(3), 2878-2890.
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