[yt-users] star_density slices
Britton Smith
brittonsmith at gmail.com
Mon Jun 13 11:04:20 PDT 2011
Ok, that at least tells us it's not a problem with the filter that's looking
for just the star particles. Can you run this script:
http://paste.enzotools.org/show/1704/
on your data, pipe the output to a file and send that back? Just give the
path to your dataset on the command line. This should check to see if there
are any inconsistencies in the grid dx's and positions.
Britton
On Mon, Jun 13, 2011 at 1:38 PM, Elizabeth Tasker <taskere at mcmaster.ca>wrote:
> Hi,
>
> Doesn't dm_density require the particle creation time to be less than or
> equal to zero? That is:
>
>
> field = pf.field_info["dm_density"]
> ------> print(field.get_source())
> def _dmpdensity(field, data):
> blank = na.zeros(data.ActiveDimensions, dtype='float32')
> if data.NumberOfParticles == 0: return blank
> filter = data['creation_time'] <= 0.0
> if not filter.any(): return blank
>
> amr_utils.CICDeposit_3(data["particle_position_x"][filter].astype(na.float64),
>
> data["particle_position_y"][filter].astype(na.float64),
>
> data["particle_position_z"][filter].astype(na.float64),
> data["particle_mass"][filter].astype(na.float32),
> na.int64(na.where(filter)[0].size),
> blank, na.array(data.LeftEdge).astype(na.float64),
> na.array(data.ActiveDimensions).astype(na.int32),
> na.float64(data['dx']))
> return blank
>
>
> It is zero in my simulation; I checked.
>
> The particle_density field though works ok (well.... it looks the same as
> the stars!) and I've attached a projection of it.
>
>
> Elizabeth
>
>
>
>
> Matthew Turk wrote:
>
>> Hi Elizabeth,
>>
>> We're basically trying to break down where the problem is.
>>
>> Here are the definitions of star_density:
>>
>> http://hg.enzotools.org/yt/src/tip/yt/frontends/enzo/fields.py#cl-269
>>
>> http://hg.enzotools.org/yt/src/tip/yt/data_objects/universal_fields.py#cl-384
>>
>> Alternately to plotting the dm_density would just be particle_density:
>>
>>
>> http://hg.enzotools.org/yt/src/tip/yt/data_objects/universal_fields.py#cl-906
>>
>> Additionally, trying without the grid overplot would also be helpful.
>> The specific item we're focusing on with the particle_density etc is
>> whether it's the grids that are causing a problem or the particle
>> selection.
>>
>> Thanks,
>>
>> -Matt
>>
>> On Mon, Jun 13, 2011 at 9:11 AM, Elizabeth Tasker <taskere at mcmaster.ca>
>> wrote:
>>
>>
>>> Hi Britton,
>>>
>>> I don't have any DM in my simulations, so I don't think that will produce
>>> anything?
>>>
>>> Elizabeth
>>>
>>>
>>> Britton Smith wrote:
>>>
>>>
>>>> Hi Elizabeth,
>>>>
>>>> Matt and I are still puzzling over this. It's not clear right now if
>>>> the
>>>> issue is related to projecting particles in general in your data or
>>>> projecting star particles specifically. Can you do another full box
>>>> projection for us, but this time with the field dm_density? That should
>>>> help us to narrow down the problem.
>>>>
>>>> Britton
>>>>
>>>> On Mon, Jun 13, 2011 at 10:31 AM, Elizabeth Tasker <taskere at mcmaster.ca
>>>> <mailto:taskere at mcmaster.ca>> wrote:
>>>>
>>>> Hi Matt and Britton,
>>>>
>>>> I've attached the image for the stars over the whole disk; it
>>>> shows the same issue, with the grids (and also any gas property)
>>>> showing the region correctly, but the stars only appearing in a
>>>> small patch.
>>>>
>>>> Matt, your script gives:
>>>>
>>>> Min: [('x', 5.6774955112245706), ('y', 5.7878015648296586), ('z',
>>>> 15.07668303734844)]
>>>> Max: [('x', 26.537083788811703), ('y', 25.802074691296504), ('z',
>>>> 17.201602159672426)]
>>>>
>>>>
>>>> Which are the values I expect.
>>>>
>>>> It could be, as Britton suggests, a problem with the box size not
>>>> being 0-1. Although, that is a particularly random patch it's
>>>> decided to fill in.
>>>>
>>>> Elizabeth
>>>>
>>>>
>>>>
>>>> Matthew Turk wrote:
>>>>
>>>> Hi Elizabeth,
>>>>
>>>> Weird.
>>>>
>>>> This script should help us find out where the stars live.
>>>> What's it
>>>> give you? (Replace the loaded dataset with your own.)
>>>>
>>>> http://paste.enzotools.org/show/1696/
>>>>
>>>> Also, it'd be nice to see that image Britton requested.
>>>>
>>>> -Matt
>>>>
>>>> On Fri, Jun 10, 2011 at 2:02 PM, Elizabeth Tasker
>>>> <taskere at mcmaster.ca <mailto:taskere at mcmaster.ca>> wrote:
>>>>
>>>> Oddly, neither of those make any difference.
>>>>
>>>> Elizabeth
>>>>
>>>>
>>>>
>>>> Britton Smith wrote:
>>>>
>>>> I would also suggest trying some projections instead
>>>> of slices as well.
>>>> Both of those fields are created using the
>>>> CIC_deposit interpolation method
>>>> with just the star particles. I could see a field
>>>> like that being
>>>> problematic when doing slices.
>>>>
>>>> Britton
>>>>
>>>> On Fri, Jun 10, 2011 at 4:10 PM, Cameron Hummels
>>>> <chummels at astro.columbia.edu
>>>> <mailto:chummels at astro.columbia.edu>
>>>> <mailto:chummels at astro.columbia.edu
>>>> <mailto:chummels at astro.columbia.edu>>> wrote:
>>>>
>>>> Try using the field StarMassMsun instead of
>>>> star_density and see
>>>> what it yields. I've had better luck with that field.
>>>>
>>>> Cameron
>>>>
>>>>
>>>> On 6/10/11 4:00 PM, Elizabeth Tasker wrote:
>>>>
>>>> Hi,
>>>>
>>>> Slices of the star_density field are only
>>>> showing a tiny patch of
>>>> the area in the corner, rather than the whole
>>>> region. My script
>>>> looks like:
>>>>
>>>> pc = PlotCollection(pf, center=[17.,11.5, 16])
>>>> p = pc.add_slice("star_density", 2)
>>>> pc.set_width(10, 'kpc')
>>>> p.modify["grids"]()
>>>>
>>>> Density comes out fine and the grids are drawn
>>>> in but then only a
>>>> few of them get stars.
>>>>
>>>> Elizabeth
>>>>
>>>>
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