Mapping the Galaxy with Radio Astronomy
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- Опубликовано: 27 авг 2024
- Produced by Danny Ben-David; created May 4, 2015
This video is designed to explore the surprising utility of radio astronomy as a tool for learning more about the universe. The video's vocabulary and content are tuned for high school students and up. Radio astronomy is a fascinating chunk of physics, because it manages to obtain impressive amounts of data with little more than a telescope which looks like a satellite dish and some math. It also ties serendipitously with discoveries such as dark matter, for reasons which will hopefully be clear within the video.
This video is part of a group of videos produced by ES.333 (Production of Educational Videos). For more information on radio astronomy, see the National Radio Astronomy Observatory's website (public.nrao.ed.... If radio astronomy interests you, consider taking Physics Junior Lab, MIT’s 8.13. It’s a tough class but all the data presented in this video was collected there, so it’s well worth it.
Thanks to Graham Ramsay and Dave Custer for their endless patience and aid in bringing this project to fruition, and thanks to Sean Robinson, who advised the script on this project to make sure I kept it grounded in reality. Thank you to Manual Perez de Lema Lopez, for giving me permission to use animations from their simulator program, MTL3D (www.mpl3d.com/). And finally thank you to Austin Duffield and the W1MX MIT Radio Society for granting me access to film atop the Green Building.
Music: "Groove Grove" Kevin MacLeod (incompetech.com), Licensed under Creative Commons: By Attribution 3.0 creativecommons...
Milky Way (artist's conception): NASA - www.jpl.nasa.go...
Milky Way (animations): MPL3D - • MPL3D Solar System - L...
Milky Way (in night sky): Serge Brunier - apod.nasa.gov/a...
Hydrogen Gas in Milky Way: Douglas Finkbeiner - astrometry.fas....
Oort, Kerr, Westerhout’s 1958 paper: adsabs.harvard....
Keywords: astronomy, radio astronomy, Milky Way, galaxy, galaxy map, Doppler Effect, rotation curve, galactic rotation curve, dark matter
love how there is KSP building music in the background
What software are you using to create your color map?
This is really cool. Did you guys set up an interferometer to improve the resolution of your telescope? If so, what was the baseline? Could an amateur do something like this, or is there just too much kit involved?
As an amatuer who has done this before, yes but i didnt try an interferometer.
Hi,
This is a nice work and explanation of the Neutral Hydrogen line observation. Just a remark : this line is named H1 and not H2.
Regards.
JJ F1EHN
Is H2 the Lamp Shift ?
@@onderozenc4470 ionic Hydrogen line
It would require a good leap of faith to connect the observed v vs r curve to "dark matter". Something like what Hubble did to draw a straight line along the observation points he got for his distance vs redshift.
By the way...wonderful job !
Neutral Hydrogen hyperfine structure emission at 21 cm, 2p-2s perturbation.
It's the 1s hyperfine.
Fantastic