[mesa-users] mesa-users Digest, Vol 28, Issue 4
Enrico Olivier
eolivier at uwc.ac.za
Tue Dec 13 02:48:57 EST 2011
Hi Bill/Josiah,
Where can one download that movie from? Is there URL somehwere? Richard, thanks for the update on libpng. I'll try it out.
R.
Enrico Olivier
Physics Department
University of the Western Cape
Email: eolivier at uwc.ac.za
Web: http://sites.google.com/site/enrolics
>>> <mesa-users-request at lists.sourceforge.net> 2011/12/12 07:34 PM >>>
Send mesa-users mailing list submissions to
mesa-users at lists.sourceforge.net
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.sourceforge.net/lists/listinfo/mesa-users
or, via email, send a message with subject or body 'help' to
mesa-users-request at lists.sourceforge.net
You can reach the person managing the list at
mesa-users-owner at lists.sourceforge.net
When replying, please edit your Subject line so it is more specific
than "Re: Contents of mesa-users digest..."
Today's Topics:
1. Re: help with installation (Enrico Olivier)
2. Re: help with installation (Enrico Olivier)
3. mesa release 3790 + a cool movie (Bill Paxton)
----------------------------------------------------------------------
Message: 1
Date: Fri, 09 Dec 2011 18:26:34 +0200
From: "Enrico Olivier" <eolivier at uwc.ac.za>
Subject: Re: [mesa-users] help with installation
To: <townsend at astro.wisc.edu>
Cc: mesa-users at lists.sourceforge.net
Message-ID: <4EE252DB020000E9000BBFC4 at uwc.ac.za>
Content-Type: text/plain; charset="us-ascii"
Hi Richard,
Thanks for the quick feedback. I'm installing MESA in my home directory on our astrogroup server. Its linux system, thats all I know at the moment. I'll have to email sysadmin about libpng.
R.
Enrico Olivier
Physics Department
University of the Western Cape
Email: eolivier at uwc.ac.za
Web: http://sites.google.com/site/enrolics
>>> Richard Townsend 12/09/11 5:44 PM >>>
This is something missing from your system -- specifically, the libpng library. Can I ask what operating system you are using?
cheers,
Rich
On Dec 9, 2011, at 9:15 AM, Enrico Olivier wrote:
> Hi,
>
> I have tried to install latest version of MESA using mesasdk, but it still failed. Most packages seem to install ok, until it hits a snag when trying to install the star package:
>
> "/user/bin/ld: cannot find -lpng"
>
> upon which its reports the installation has failed and exits. Am I missing a software package on my system, or is something missing from the mesa directory?
>
> Thanks! Ricky
>
>
>
>
> Enrico Olivier
> Physics Department
> University of the Western Cape
> Email: eolivier at uwc.ac.za
> Web: http://sites.google.com/site/enrolics
> All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/emaildisclaimer
>
> ------------------------------------------------------------------------------
> Cloud Services Checklist: Pricing and Packaging Optimization
> This white paper is intended to serve as a reference, checklist and point of
> discussion for anyone considering optimizing the pricing and packaging model
> of a cloud services business. Read Now!
> http://www.accelacomm.com/jaw/sfnl/114/51491232/_______________________________________________
> mesa-users mailing list
> mesa-users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/mesa-users
-------------- next part --------------
All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/emaildisclaimer
------------------------------
Message: 2
Date: Mon, 12 Dec 2011 13:10:11 +0200
From: "Enrico Olivier" <eolivier at uwc.ac.za>
Subject: Re: [mesa-users] help with installation
To: "Richard Townsend" <townsend at astro.wisc.edu>
Cc: mesa-users at lists.sourceforge.net
Message-ID: <4EE5FD33020000E9000BC18D at uwc.ac.za>
Content-Type: text/plain; charset="us-ascii"
Hi Richard,
The system installed is centos plus x86_64. According to sysadmin libpng is installed. Maybe its located in a non standard location?
R.
Enrico Olivier
Physics Department
University of the Western Cape
Email: eolivier at uwc.ac.za
Web: http://sites.google.com/site/enrolics
>>> Richard Townsend <townsend at astro.wisc.edu> 2011/12/09 05:43 PM >>>
This is something missing from your system -- specifically, the libpng library. Can I ask what operating system you are using?
cheers,
Rich
On Dec 9, 2011, at 9:15 AM, Enrico Olivier wrote:
> Hi,
>
> I have tried to install latest version of MESA using mesasdk, but it still failed. Most packages seem to install ok, until it hits a snag when trying to install the star package:
>
> "/user/bin/ld: cannot find -lpng"
>
> upon which its reports the installation has failed and exits. Am I missing a software package on my system, or is something missing from the mesa directory?
>
> Thanks! Ricky
>
>
>
>
> Enrico Olivier
> Physics Department
> University of the Western Cape
> Email: eolivier at uwc.ac.za
> Web: http://sites.google.com/site/enrolics
> All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/emaildisclaimer
>
> ------------------------------------------------------------------------------
> Cloud Services Checklist: Pricing and Packaging Optimization
> This white paper is intended to serve as a reference, checklist and point of
> discussion for anyone considering optimizing the pricing and packaging model
> of a cloud services business. Read Now!
> http://www.accelacomm.com/jaw/sfnl/114/51491232/_______________________________________________
> mesa-users mailing list
> mesa-users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/mesa-users
-------------- next part --------------
An HTML attachment was scrubbed...
-------------- next part --------------
All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/emaildisclaimer
------------------------------
Message: 3
Date: Mon, 12 Dec 2011 09:34:17 -0800
From: Bill Paxton <paxton at kitp.ucsb.edu>
Subject: [mesa-users] mesa release 3790 + a cool movie
To: "mesa-users at lists.sourceforge.net users"
<mesa-users at lists.sourceforge.net>, mesa-news at lists.sourceforge.net
Message-ID: <E7023BF1-2D26-487A-BBC0-927C80B88BE2 at kitp.ucsb.edu>
Content-Type: text/plain; charset="us-ascii"
Hi,
Release notes will be found below, but I believe in eating dessert first,
so, here's something neat from Josiah Schwab <jwschwab at berkeley.edu>
He used mesa/star plus tioga to make a movie from pdf's giving very high quality text and graphics.
Thank you, Josiah, for creating this and sharing it with us. ;-)
I wish I'd had something like it when I was first learning about stellar evolution!!!!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lifetime_720p.mp4
Type: video/mp4
Size: 2574228 bytes
Desc: not available
-------------- next part --------------
Now onto the information about mesa version 3790.
There have been the usual small changes and bug fixes.
For example, we now add a point at the true center, r=0,
for FGONG and OSC files. However, most of my time has
been spent working on producing a more realistic abundance profile
in newly nonconvective regions left behind by retreating convective boundaries.
For example, in a massive star with convective center burning, there will be periods when
the top of the central convection zone is moving out and other times when it is moving inward.
And at the same time that the boundary is moving, the composition of the zone is
changing because of the strong nuclear burning. Both the position of the boundary and
the composition in the zone are changing smoothly in time. But in the code, we take
finite jumps in time and leave small irregularities in abundances behind a retreating
convection boundary. For most applications, these composition "wiggles" are unimportant,
but for asteroseismology, they are an issue since the brunt frequency is sensitive
to the slope of the abundances, and little wiggles in abundances will produce
BIG wiggles in the derivatives of the abundances.
One way to deal with this, perhaps the best way, is to turn on overshooting
and let it clean up the trailing mess. (Ledoux + semiconvection can also help
in some cases.) But if you'd like to study the effect of overshooting by varying
its strength, you'd like to be able to include the case where the strength is set
all the way down to zero -- which means you'd like to have reasonable results
for the case of plain-vanilla-Schwarzschild without overshooting. And to do that,
you need to account for the sub-step changes in position and composition at
the retreating edge of a convection zone.
The current release of mesa includes my current best attempt to deal with this.
At the start of each step, before rezoning, it notices regions that were convective
previously but will be nonconvective now. It flags these so that they will be given
higher than normal resolution during the rezoning. Then, after the normal step
has generated a new structure and composition in the old way, complete with
wiggles, the code revisits the newly nonconvective regions and smooths the
abundances to reflect that fact that intermediate positions ceased to be convective
at intermediate times when the abundance was at intermediate values.
If all this sounds complicated and difficult to implement, you are right!
Thanks goes to Anne Thoul and Pieter Degroote for encouraging me to keep
trying on this problem in spite of repeated failures. Thanks also to
Aldo Serenelli and Andrea Miglio who, along with Anne and Pieter, had
to put up with my irrational tantrums as I struggled with this frustrating task.
Here's an example that shows the change in the Brunt we get by doing
the new scheme.
9M, Z=0.02, stop when center H reaches 0.4
"pure" Schwarzschild, no overshooting.
relevant inlist controls:
r_div_R_smooth_brunt_dlnY_dlnP = 0.001
! width in fraction of stellar radius of top-hat smoothing function
nsmooth_brunt_dlnY_dlnP = 1
! the number of times to do r_div_R_smooth_brunt_dlnY_dlnP
OLD (version 3709) --- small wiggles in he4 profile produce ragged brunt frequencies.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: brunt_frequency.pdf
Type: application/pdf
Size: 27926 bytes
Desc: not available
-------------- next part --------------
A non-text attachment was scrubbed...
Name: he4.pdf
Type: application/pdf
Size: 26777 bytes
Desc: not available
-------------- next part --------------
NEW (version 3790)
relevant inlist controls:
same as above, plus
smooth_convective_bdy = .true.
convective_bdy_weight = 1
-------------- next part --------------
A non-text attachment was scrubbed...
Name: brunt_frequency.pdf
Type: application/pdf
Size: 28223 bytes
Desc: not available
-------------- next part --------------
A non-text attachment was scrubbed...
Name: he4.pdf
Type: application/pdf
Size: 27225 bytes
Desc: not available
-------------- next part --------------
Finally, I continue to use Rich Townsend's mesasdk and encourage you to do the same unless you have
a special need to do things the hard way. To reduce the size of an already too huge mesa download, the mesasdk is
not included -- get it directly from http://www.astro.wisc.edu/~townsend/static.php?ref=mesasdk#toc-Downloads
The latest version is dated Nov 11, 2011.
Good luck!
-Bill
------------------------------
------------------------------------------------------------------------------
Learn Windows Azure Live! Tuesday, Dec 13, 2011
Microsoft is holding a special Learn Windows Azure training event for
developers. It will provide a great way to learn Windows Azure and what it
provides. You can attend the event by watching it streamed LIVE online.
Learn more at http://p.sf.net/sfu/ms-windowsazure
------------------------------
_______________________________________________
mesa-users mailing list
mesa-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/mesa-users
End of mesa-users Digest, Vol 28, Issue 4
*****************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20111213/c9a02cb5/attachment.html>
-------------- next part --------------
All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/emaildisclaimer
More information about the Mesa-users
mailing list