Question

In: Physics

is it possible to identify different types of quasars based on its color? please provide a...

is it possible to identify different types of quasars based on its color? please provide a refrence so i can read into it more

Solutions

Expert Solution

Quasars are extremely luminous and were first identified as being high redshift sources ofelectromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather than extended sources similar to galaxies. Their spectra contain very broad emission lines, unlike any known from stars, hence the name "quasi-stellar". Their luminosity can be 100 times greater than that of the Milky Way.

Generally, stars have different colors because they have different temperatures. However, stars are not perfect thermal sources. For instance, a certain type of star called a carbon star has a very red color. Carbon in the star's atmosphere absorbs much of its blue light, making the cool star appear even redder than it should for its temperature.

A star's color can usually give you a good idea of its temperature, but it is always a good idea to double-check by measuring the star's spectrum with a spectrograph. In fact, whenever the SDSS sees an extremely red star, software automatically targets the star for follow-up measurements with the spectrograph.

Astronomers use colors to classify many objects including stars, galaxies and quasars. They can use colors to estimate the spectral types of stars, the types of galaxies, to sort asteroids into different classes, and to estimate the distances to galaxies and quasars.


Related Solutions

2. Based on the enacted laws rate of 1% (169/15702), identify the possible types of misclassifications,...
2. Based on the enacted laws rate of 1% (169/15702), identify the possible types of misclassifications, and comment on the use of overall accuracy as a metric if a company claims they can predict if a bill will pass with 94% accuracy.
what are the following field procedures: Intersection & Resection? Identify the different types of each. Provide...
what are the following field procedures: Intersection & Resection? Identify the different types of each. Provide a simple sketch of each  
Please list and provide a short description and example of the different types of firms when...
Please list and provide a short description and example of the different types of firms when forecasting revenues
Please list and provide a DESCRIPTION and EXAMPLE of the different types of firms when forecasting...
Please list and provide a DESCRIPTION and EXAMPLE of the different types of firms when forecasting revenues.
Identify the four different types of wireless encryption, and indicate which ones provide the best security....
Identify the four different types of wireless encryption, and indicate which ones provide the best security. Provide a brief explanation of each.
Please list the different types of unions within the United States and provide background history of...
Please list the different types of unions within the United States and provide background history of each type?
answer use a different color, please) 1. In shorthorn cattle the gene for red coat color...
answer use a different color, please) 1. In shorthorn cattle the gene for red coat color is not dominant over that for white coat color.       The heterozygous condition produces a roan color. A breeder has a white, red, and roan         cows and bulls. What phenotypes can be expected from the following crosses? A. Red x roan                B. Red x red               C.. Roan x white D. Red x white 2. A homozygous black chicken is crossed with a homozygous splashed white...
Please respond to the following questions based upon these course objectives: Determine the different types of...
Please respond to the following questions based upon these course objectives: Determine the different types of hospital ownership. Examine the different healthcare delivery systems. Discuss how delivery systems relate to the concepts of public health. Please answer the following questions with supporting examples and full explanations. For each of the learning objectives, provide an analysis of how the course supported each objective. Explain how the material learned in this course, based upon the objectives, will be applicable to the professional...
LINUX Please conduct some research about the different types of servers there are, provide me 4...
LINUX Please conduct some research about the different types of servers there are, provide me 4 types. Provide me a summary of what you have learned for each.
Please provide a high-level professional answer (a) Identify four different users groups that will be interested...
Please provide a high-level professional answer (a) Identify four different users groups that will be interested in the information ina public company’s Annual Report. (b) Discuss the information in the Annual Report that will be of particularinterest to each of the groups that you identified in (a) (c) Discuss the Auditor’s Report and its usefulness to shareholders. (d) Discuss the information provided in a Cash Flow statement and critically assess itsusefulness to readers of the Annual Report
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT