Object that we can observe where all 3 types of redshifts

  • Thread starter Sanjay87
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In summary, the conversation discusses the different types of redshifts and the difficulty in identifying each one individually. It is mentioned that cosmological redshift is usually the dominant component and that even super massive black holes have insignificant gravitational redshifts. Proper motions and Doppler redshifts are also mentioned as weak factors. The main point is that despite the different types of redshifts, they cannot be separately measured for an individual object and are ultimately all considered as one redshift.
  • #1
Sanjay87
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Hi,

Is there any kind of object that we can observe where all 3 types of redshifts can be clearly identified - Doppler, gravitational and cosmological?

Thank you.

San
 
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  • #2
All of them. Redshift components are not easily separated. Cosmological redshift is usually the dominant component. Even super massive black holes have insignificant gravitational redshifts because most luminosity occurs too distant from the event horizon to be measurably affected. Doppler redshift is also a weak player. Proper motions - with the exception of supernova ejecta - are rarely more than a tiny fraction of the speed of light.
 
  • #3
There is only one redshift. We can determine different physical processes that may have lead to an object having a given redshift, but observationally redshift is redshift so you can't measure anything that will tell you what caused the redshift to occur for an individual object.
 

1. What is an object that exhibits all 3 types of redshifts?

An object that exhibits all 3 types of redshifts is known as a quasar. These are extremely bright and distant objects that emit large amounts of energy. They are considered to be some of the oldest and most distant objects in the universe.

2. What are the 3 types of redshifts that an object can exhibit?

The 3 types of redshifts that an object can exhibit are Doppler redshift, cosmological redshift, and gravitational redshift. Doppler redshift is caused by the relative motion between the source and the observer, cosmological redshift is caused by the expansion of the universe, and gravitational redshift is caused by the distortion of space-time due to the object's strong gravitational field.

3. How do scientists use redshifts to study objects in the universe?

Scientists use redshifts to study objects in the universe by analyzing the wavelengths of light emitted by these objects. By measuring the amount of redshift, they can determine the relative velocity, distance, and even the composition of the object. This information helps us understand the evolution and structure of the universe.

4. Can all types of objects exhibit redshifts?

Yes, all types of objects in the universe can exhibit redshifts. However, the amount of redshift observed may vary depending on the object's distance, velocity, and gravitational pull. Some objects, like quasars, exhibit all 3 types of redshifts, while others may only exhibit one or two types.

5. What are some other objects besides quasars that exhibit all 3 types of redshifts?

Besides quasars, other objects that exhibit all 3 types of redshifts include galaxies, supernovae, and gamma-ray bursts. These objects are typically very distant and emit large amounts of energy, making them ideal for studying the effects of redshift on light.

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