Star formation questions (split from age of sun)

[David Levy]

You need to model a nebula in order to form a star/Sun.

 

A) nebula density

B) average density

C) material type ie hydrogen, lithium deuterium etc.

D) average blackbody temperature of nebula

E) condensed anisotropy development

F) Jeans equations (hydrodynamic)

G) along with f cause of collapse

H) isothermal sphere distribution of mass to protoplanetary disk. (Hydrodynamics)

 

However right now you need to know the basic physics. We covered blackbody to redshift. We haven't gotten into shell theorem, Keplers laws in particular elliptical orbits

 

Then we need hydrodynamic approximations (which involves mass/energy to temperature/pressure relations).

 

star formation involves a lot of relations and knowledge.

 

Sorry for the interrupt.

However, I have few questions:

 

1. Why do we need a nebula in order to form a star/Sun?

2. What about star forming in a galaxy core? For example star forming activity in the Milky Way galaxy:

https://en.wikipedia.org/wiki/Milky_Way#Galactic_Center

 

"The bar may be surrounded by a ring called the "5-kpc ring" that contains a large fraction of the molecular hydrogen present in the Milky Way,

as well as most of the Milky Way's star-formation activity."

3. Does it mean that the core of the Milky way galaxy has the power to form much more new stars than all nebulas in the galaxy?

4. Is it possible that our sun had been formed at that core?

5. It is stated that the Milky way form only 10 stars per year.

https://en.wikipedia.org/wiki/Baby_Boom_Galaxy

 

"The Milky Way galaxy in which Earth resides turns out an average of just 10 stars per year.[4]"

So, how many are formed at the core and how many at the nebulas?

6. with regards to the baby boom galaxy -

https://en.wikipedia.org/wiki/Baby_Boom_Galaxy

 

it is stated:

"The Baby Boom Galaxy is a starburst galaxy located 12.2 billion light years away.^[1][4] Discovered by NASA's Spitzer Science Center at the California Institute of Technology, the galaxy is notable for being the new record holder for thebrightest starburst galaxy in the very distant universe, with brightness being a measure of its extreme star-formation rate.^[5]The Baby Boom Galaxy has been nicknamed "the extreme stellar machine" because it is seen producing stars at a surprising rate of up to 4,000 per year (one star every 2.2 hours)."

Do we have any idea where that star forming activity takes care? is it also in the core of the galaxy?

Edited February 22, 2016 by David Levy

[Mordred]

 

Sorry for the interrupt.

However, I have few questions:

 

1. Why do we need a nebula in order to form a star/Sun?

2. What about star forming in a galaxy core? For example star forming activity in the Milky Way galaxy:

https://en.wikipedia.org/wiki/Milky_Way#Galactic_Center

 

"The bar may be surrounded by a ring called the "5-kpc ring" that contains a large fraction of the molecular hydrogen present in the Milky Way,

as well as most of the Milky Way's star-formation activity."

3. Does it mean that the core of the Milky way galaxy has the power to form much more new stars than all nebulas in the galaxy?

4. Is it possible that our sun had been formed at that core?

5. It is stated that the Milky way form only 10 stars per year.

https://en.wikipedia.org/wiki/Baby_Boom_Galaxy

 

"The Milky Way galaxy in which Earth resides turns out an average of just 10 stars per year.[4]"

So, how many are formed at the core and how many at the nebulas?

6. with regards to the baby boom galaxy -

https://en.wikipedia.org/wiki/Baby_Boom_Galaxy

 

it is stated:

"The Baby Boom Galaxy is a starburst galaxy located 12.2 billion light years away.^[1][4] Discovered by NASA's Spitzer Science Center at the California Institute of Technology, the galaxy is notable for being the new record holder for thebrightest starburst galaxy in the very distant universe, with brightness being a measure of its extreme star-formation rate.^[5]The Baby Boom Galaxy has been nicknamed "the extreme stellar machine" because it is seen producing stars at a surprising rate of up to 4,000 per year (one star every 2.2 hours)."

Do we have any idea where that star forming activity takes care? is it also in the core of the galaxy?

 

 

Were talking of nebula in the sense of plasma within a galaxy, for example the Orion Nebula is only 1.35 light years from Earth. I is a star forming region.

 

"The Orion Nebula is an example of a stellar nursery where new stars are being born. Observations of the nebula have revealed approximately 700 stars in various stages of formation within the nebula."

 

https://en.wikipedia.org/wiki/Orion_Nebula

 

that should answer your questions. Stars can and do form in any nebula with sufficient density provided some mechanism causes over densities to form. A common occurance is nearby supernova shockwaves.

[David Levy]

Thanks

[swansont]

Sorry for the interrupt.[/size]

However, I have few questions:[/size]

!

Moderator Note

Otherwise known as thread hijacking. Don't do this; start a new thread instead.