[FLASH-USERS] Question about star formation using FLASH

[Robert Fisher]

To elaborate upon what John has stated, star particles like those you have 
described have not been implemented into FLASH. However, FLASH does 
support active, gravitating particles, so the addition of such a feature 
would be relatively straightforward -- the algorithm has already 
been fully laid out, for instance in Krumholz et al (2004) --

http://adsabs.harvard.edu/abs/2004ApJ...611..399K

I am certain your colleague could obtain assistance where needed from 
both the FLASH code group and the user community.

   Best wishes,

   Bob

On Thu, 31 Jan 2008, John ZuHone wrote:

> Hello M.A.,
>
> 	Such capabilities are not currently in FLASH2 and they will not be 
> in the first release of FLASH3, though they *may* be in future releases. 
> Others have managed to get this working for their own use.
>
> 	Strictly speaking one would not be converting gas particles (since 
> we're working with Eulerian grid variables) but would be creating massive 
> star particles from scratch at a particular grid location once conditions 
> were met at that location (say, density rises to a certain value and 
> temperature falls below a certain value). Then the star particle would be 
> taking its velocity as well from the local velocity on the grid.
>
> 	In essence, this is not currently implemented but once one had a 
> prescription for this it should not be difficult to implement.
>
> Best,
>
> John Z
>
> On Jan 31, 2008, at 8:10 AM, M.A. Latife wrote:
>
>> 
>> Hi all,
>> one of my colleagues is interested in using FLASH, His question is as 
>> follows, i Hope you people can reply his question in better way.
>> "I want to simulate star formation starting with gas particles. Is Flash 
>> able to convert gas particles (when a certain condition is met) into star 
>> particles? This because I want to see the initial mass function. Do I have 
>> to write my own module for this, or is there such an option already there? 
>> "
>> 
>> Thanks,
>> M.A.Latife