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The speed of the material ejected in a supernova can be measured by using the Doppler shift of the X-ray emission lines in its spectrum. The images above show real X ray data of the Cassiopeia A supernova remnant and a spectrum extracted from that data--you can see several emission lines ncluding the silicon line near 6.6 angstroms (0.66 nm). f the emission line created by silicon normally has a wavelength of 0.6648 nm (nanometers), but is measured in the spectrum to have a wavelength of 0.6605 nm, how fast is the gas moving? km/s (be sure to convert your answer to kilometers!) Enter a positive value-if you get a negative answer ignore the minus sign.)

The speed of the material ejected in a supernova can be measured by using the Doppler shift of the X-ray emission lines in its spectrum. The images above show real X ray data of the Cassiopeia A supernova remnant and a spectrum extracted from that data--you can see several emission lines ncluding the silicon line near 6.6 angstroms (0.66 nm). f the emission line created by silicon normally has a wavelength of 0.6648 nm (nanometers), but is measured in the spectrum to have a wavelength of 0.6605 nm, how fast is the gas moving? km/s (be sure to convert your answer to kilometers!) Enter a positive value-if you get a negative answer ignore the minus sign.)

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
Section: Chapter Questions
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**Cas A SNR North Lobe - Chandra ACIS Image (M. Stage)** --- **Image Analysis:** On the left, we have an X-ray image of the Cassiopeia A supernova remnant, captured using the Chandra Advanced CCD Imaging Spectrometer (ACIS). The image highlights the northern lobe of the remnant, with a designated region of the spectrum marked. **Graph Analysis:** On the right, the graph represents the X-ray spectrum extracted from the Cassiopeia A supernova remnant data. The X-axis is labeled "Wavelength (Angstroms)" and ranges from 0 to 25 Angstroms, while the Y-axis is labeled "Counts (log scale)" and extends from 10 to 1000. The graph prominently marks a section labeled as the "Silicon line." **Scientific Context:** The speed of material ejected in a supernova can be determined by analyzing the Doppler shift of X-ray emission lines present in its spectrum. The graph displays real X-ray data, showcasing several emission lines, including the notable silicon line near 6.6 Angstroms (0.66 nm). **Problem Statement:** If the emission line created by silicon originally has a wavelength of 0.6648 nm, but it is observed in the spectrum at 0.6605 nm, calculate how fast the gas is moving. Provide your answer in kilometers per second (km/s). If your calculation yields a negative value, ignore the minus sign for this purpose. --- *Note: This transcription aims to enhance understanding for educational purposes, particularly focusing on the application of Doppler shift in studying supernova remnants.*
Transcribed Image Text:**Cas A SNR North Lobe - Chandra ACIS Image (M. Stage)** --- **Image Analysis:** On the left, we have an X-ray image of the Cassiopeia A supernova remnant, captured using the Chandra Advanced CCD Imaging Spectrometer (ACIS). The image highlights the northern lobe of the remnant, with a designated region of the spectrum marked. **Graph Analysis:** On the right, the graph represents the X-ray spectrum extracted from the Cassiopeia A supernova remnant data. The X-axis is labeled "Wavelength (Angstroms)" and ranges from 0 to 25 Angstroms, while the Y-axis is labeled "Counts (log scale)" and extends from 10 to 1000. The graph prominently marks a section labeled as the "Silicon line." **Scientific Context:** The speed of material ejected in a supernova can be determined by analyzing the Doppler shift of X-ray emission lines present in its spectrum. The graph displays real X-ray data, showcasing several emission lines, including the notable silicon line near 6.6 Angstroms (0.66 nm). **Problem Statement:** If the emission line created by silicon originally has a wavelength of 0.6648 nm, but it is observed in the spectrum at 0.6605 nm, calculate how fast the gas is moving. Provide your answer in kilometers per second (km/s). If your calculation yields a negative value, ignore the minus sign for this purpose. --- *Note: This transcription aims to enhance understanding for educational purposes, particularly focusing on the application of Doppler shift in studying supernova remnants.*
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