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<div class="moz-cite-prefix">Le 05/10/2013 14:18, Michel Rieutord a
écrit :<br>
</div>
<blockquote cite="mid:525003A6.7040505@irap.omp.eu" type="cite">
<meta content="text/html; charset=ISO-8859-1"
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<div class="moz-cite-prefix">Hi Jeremy,<br>
<br>
I think the best answer to your question is to be found with the
ESTER <br>
code that you can freely download at<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://code.google.com/p/ester-project/">http://code.google.com/p/ester-project/</a><br>
<br>
This is a code that computes the 2D structure, including
differential<br>
rotation and meridional circulation, of rotating early-type
stars at <br>
any rotation rate (below critical of course). With this code
you'll be <br>
able to compare your data with those of the model including the
<br>
temperature dependence with latitude; by adjusting the hyrdogen
content<br>
of the core you may get an idea of the evolution status of your
star on<br>
the main sequence. This won't give you an age in years but this
can <br>
obtained with a 1D code afterwards. We are working out the time
<br>
evolution but this is not yet ready; this a tough problem all
the more<br>
that we need to also evolve the dynamics...<br>
<br>
You may find examples of the results in<br>
Espinosa Lara & Rieutord 2013, A&A, 552, A35<br>
Rieutord & Espinosa Lara 2013, LNP 865, 49, Arxive 1208.4929<br>
or 2013arXiv:1310.0908 or arXiv:1310.1017<br>
<br>
Don't hesitate if you have questions.<br>
<br>
Best wishes,<br>
<br>
Michel Rieutord<br>
<br>
</div>
</blockquote>
PS third attempt; hope this is the good one.<br>
<blockquote cite="mid:525003A6.7040505@irap.omp.eu" type="cite">
<div class="moz-cite-prefix">
<pre class="moz-signature" cols="72">**************************************************************************
Michel Rieutord
Institut de Recherche en Astrophysique et Planétologie
Observatoire Midi-Pyrénées email : <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Michel.Rieutord@irap.omp.eu">Michel.Rieutord@irap.omp.eu</a>
14 avenue Edouard Belin Tel +33 -(0)5 61 33 29 49
31400 Toulouse, France Fax +33 -(0)5 61 33 28 40
**************************************************************************</pre>
Le 04/10/2013 22:25, Jeremy Jones a écrit :<br>
</div>
<blockquote
cite="mid:CAD9nXrZ-ZGW9Jy0DD2npW=Bmr7d_D8juMsFEHgEdRsiBMoyrbw@mail.gmail.com"
type="cite">
<div dir="ltr">Hey mesa users,
<div><br>
</div>
<div>I'm working on a project concerning interferometry of
A-stars. Many of my targets are rapid rotators, and I'm
looking into using mesa to determine their ages. I've played
around with mesa a bit (I've included one of my inlists
below). I have a question about how to compare my
observables with the mesa outputs, in particular radius and
temperature.</div>
<div><br>
</div>
<div>From the modeling I do of the inerferometric data, I get
the full radius profile of the star (i.e. radius as a
function of latitude). Likewise, I get the full temperature
profile of the star.</div>
<div> <br>
</div>
<div>My question is for a rapid rotator, which
radius/temperature should I compare with the mesa outputs to
get the age of the star? Polar radius/temperature,
equatorial radius/temperature, something more involved?</div>
<div><br>
</div>
<div>Thanks for any insight!</div>
<div><br>
</div>
<div>~Jeremy</div>
<div><br>
</div>
<div>The aforementioned inlist:</div>
<div>================</div>
<div>
<div>&star_job</div>
<div><br>
</div>
<div> mesa_dir = '../..'</div>
<div><br>
</div>
<div> set_initial_age = .true.</div>
<div> initial_age = 0 ! in years</div>
<div><br>
</div>
<div> set_initial_model_number = .true.</div>
<div> initial_model_number = 0</div>
<div><br>
</div>
<div> create_pre_main_sequence_model = .true.</div>
<div> </div>
<div> new_omega_div_omega_crit = 0.5 </div>
<div> near_zams_relax_omega_div_omega_crit = .true.</div>
<div><br>
</div>
<div> pgstar_flag = .true.</div>
<div><br>
</div>
<div><br>
</div>
<div>/ ! end of star_job namelist</div>
<div><br>
</div>
<div><br>
</div>
<div>&controls</div>
<div><br>
</div>
<div> min_timestep_limit = 1d-12 ! (seconds)</div>
<div><br>
</div>
<div> ! check for retries and backups as part of
test_suite</div>
<div> ! you can delete this for use outside of
test_suite</div>
<div> max_number_backups = 400</div>
<div> max_number_retries = 900</div>
<div> max_model_number = 1500</div>
<div><br>
</div>
<div> !max_allowed_nz = 20000 ! maximum number of
grid points allowed</div>
<div><br>
</div>
<div> initial_mass = 2</div>
<div> initial_z = 0.016</div>
<div><br>
</div>
<div> photostep = 10</div>
<div> profile_interval = 10</div>
<div> history_interval = 1</div>
<div> terminal_interval = 2</div>
<div> write_header_frequency = 10</div>
<div><br>
</div>
<div>/ ! end of controls namelist</div>
<div><br>
</div>
<div><br>
</div>
<div>&pgstar</div>
<div><br>
</div>
<div><span class="" style="white-space:pre"> </span>History_Track1_win_flag
= .true.</div>
<div><span class="" style="white-space:pre"> </span>History_Track1_yname
= 'log_R'</div>
<div><span class="" style="white-space:pre"> </span>History_Track1_yaxis_label
= 'log(R/R_sun)'</div>
<div><span class="" style="white-space:pre"> </span>History_Track1_xname
= 'log_Teff'</div>
<div><span class="" style="white-space:pre"> </span>History_Track1_xaxis_label
= 'log(T/K)'</div>
<div><span class="" style="white-space:pre"> </span>History_Track1_title
= 'Radius vs. Effective Temperature'</div>
<div><br>
</div>
<div><span class="" style="white-space:pre"> </span>History_Track2_win_flag
= .true.</div>
<div><span class="" style="white-space:pre"> </span>History_Track2_yname
= 'surf_avg_v_rot'</div>
<div><span class="" style="white-space:pre"> </span>History_Track2_yaxis_label
= 'Equatorial Velocity (km/s)'</div>
<div><span class="" style="white-space:pre"> </span>History_Track2_xname
= 'star_age'</div>
<div><span class="" style="white-space:pre"> </span>History_Track2_xaxis_label
= 'Age (yr)'</div>
<div><span class="" style="white-space:pre"> </span>History_Track2_title
= 'Surface Velocity vs. Age'</div>
<div><br>
</div>
<div>/ ! end of pgstar namelist</div>
</div>
<div>================<br>
</div>
<div><br>
</div>
<div>
<div>-- </div>
<div>Jeremy Jones</div>
<div>Graduate Student Assistant</div>
<div>Georgia State University</div>
<div> Department of Physics & Astronomy</div>
<div><a moz-do-not-send="true"
href="mailto:jones@chara.gsu.edu">jones@chara.gsu.edu</a></div>
</div>
</div>
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