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8. Assume the Milky Way has a flat rotation curve, and that our local circular velocity is 220 km/sec, and that our galactocentric distance is 8.0 Kpc. Suppose you use a radio telescope at 21cm to observe HI gas in the plane of the Milky Way in the direction of galactic longitude 30 degrees. What is the most extreme radial velocity you could see along this line of sight? State whether it is a blueshift or redshift, and whether a maximum or a minimum. Interstellar gas having that particular radial velocity would be how far from us?

8. Assume the Milky Way has a flat rotation curve, and that our local circular velocity is 220 km/sec, and that our galactocentric distance is 8.0 Kpc. Suppose you use a radio telescope at 21cm to observe HI gas in the plane of the Milky Way in the direction of galactic longitude 30 degrees. What is the most extreme radial velocity you could see along this line of sight? State whether it is a blueshift or redshift, and whether a maximum or a minimum. Interstellar gas having that particular radial velocity would be how far from us?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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8. Assume the Milky Way has a flat rotation curve, and that our local circular velocity is 220 km/sec, and that our galactocentric distance is 8.0 Kpc. Suppose you use a radio telescope at 21cm to observe HI gas in the plane of the Milky Way in the direction of galactic longitude 30 degrees. What is the most extreme radial velocity you could see along this line of sight? State whether it is a blueshift or redshift, and whether a maximum or a minimum. Interstellar gas having that particular radial velocity would be how far from us?
Transcribed Image Text:8. Assume the Milky Way has a flat rotation curve, and that our local circular velocity is 220 km/sec, and that our galactocentric distance is 8.0 Kpc. Suppose you use a radio telescope at 21cm to observe HI gas in the plane of the Milky Way in the direction of galactic longitude 30 degrees. What is the most extreme radial velocity you could see along this line of sight? State whether it is a blueshift or redshift, and whether a maximum or a minimum. Interstellar gas having that particular radial velocity would be how far from us?
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