Luminosity

[IG2007]

I thought I had already answered it in #13, no?

 

[vincenzosassone]

I thought I had already answered it in #13, no?

Well then, you gave us the equation to calculate the luminosity of an object. The equation is important, expecially in this case, but it isn't enough to understand the limit of luminosity since the maximum temperature that an object can assume (stars, quasars, blazars, something undiscovered yet) is unknown...

We can't actually know the limits of temperature, but only the highest ridge ever meansured.

 

[IG2007]

We can't actually know the limits of temperature, but only the highest ridge ever meansured.

Well, just like Einstein set the limits of speed, Planck set the limits of heat. It's called Planck temperature, it's 10-to-the-power-32 Kelvin.

Planck's law - Wikipedia

en.wikipedia.org

 

[Catastrophe]

Yes.

 

[Clovis]

A lot of people who had, or still have a Crown Victoria, named them Vicky

 

[IG2007]

Is that a British quip I don't understand?

 

[Catastrophe]

IG, Probably something to do with Queen Victoria, Cat

 

[Pogo]

Seems likely a reference to the American automobile Ford Crown Victoria, although, I fail to see the connection to this thread.

In my locale, we called it the ‘Crown Vic’.

 

[Catastrophe]

Crown Vic (film) - Wikipedia
https://en.wikipedia.org › wiki › Crown_Vic_(film)

American action film directed by Joel Souza and starring Luke Kleintank, Thomas Jane, Bridget Moynahan, David Krumholtz, ...

Apologies for my ignorance of the US connection.

Cat

 

[Pogo]

Not necessary, Cat. Betcha we have no idea the brands and models of domestic cars and other stuff you have there; or anywhere else, for that matter.

 

[Catastrophe]

OP asked: "Is there a limit to luminosity?"

Sure there is. Higher and higher luminosity requires higher and higher temperature/energy. Higher and higher levels of anything require faster and faster levels of return to lower levels. It's entropy driven.


Cat

 

[Lariliss]

Active galactic nucleus have the highest known, right?

 

[Catastrophe]

Anything 'highest' will be driven by entropy to a lower lever.

Cat

 

[Lariliss]

Anything 'highest' will be driven by entropy to a lower lever.

Cat

Yes.
AGN exploration is still hard and uncertain, it is dependent on the black hole to be fed. Though they are showing to be stable.

High luminosities imply high masses such that gravity can combat radiation pressure, which would otherwise blow the object apart. AGN therefore are of very high mass density, and it has long been assumed that they consist of a massive black hole, accreting the gas and dust at the center of a galaxy.
The matter probably has some angular momentum, which causes it to orbit the black hole and, through dissipation of energy, flatten to form a disk.

Matter of time (from observer point if vew, of course).

 

[Catastrophe]

https://imgur.com/a/FxyAA7a

View: https://imgur.com/a/FxyAA7a

https://www.roe.ac.uk/workshop/jwst/presentations/alonso-herrero-jwst-roe-july-2016.pdf

NASA

Cat

 

[Lariliss]

https://imgur.com/a/FxyAA7a

View: https://imgur.com/a/FxyAA7a

https://www.roe.ac.uk/workshop/jwst/presentations/alonso-herrero-jwst-roe-july-2016.pdf

NASA

Cat

And might be this

https://arxiv.org/pdf/0907.1608.pdf

 

[Catastrophe]

I still maintain that any "highest", or anything "most" is subject to the levelling influence of entropy.
Apply this only (as per the question) to luminous objects.

Cat

 

[vincenzosassone]

Well, just like Einstein set the limits of speed, Planck set the limits of heat. It's called Planck temperature, it's 10-to-the-power-32 Kelvin.

Planck's law - Wikipedia

en.wikipedia.org

Soooo...there is actually a maximum level!
I knew the limit of the speed, the smallest length or something else,now I don't remember, but I would have never imagined there was a limit for it.
I'm sorry

 

[Catastrophe]

Thanks to IG2007 for supplying the reference. I worked out that there had to be a maximum temperature but could not have proved it.

Cat