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<div class="section" id="module-pNbody.units">
<span id="the-units-module"></span><h1>the units module<a class="headerlink" href="#module-pNbody.units" title="Permalink to this headline"></a></h1>
<dl class="class">
<dt id="pNbody.units.PhysCte">
<em class="property">class </em><tt class="descclassname">pNbody.units.</tt><tt class="descname">PhysCte</tt><big>(</big><em>value</em>, <em>Unit</em><big>)</big><a class="headerlink" href="#pNbody.units.PhysCte" title="Permalink to this definition"></a></dt>
<dd><p>Physical constant</p>
<p class="rubric">Methods</p>
</dd></dl>
<dl class="function">
<dt id="pNbody.units.Set_SystemUnits_From_Params">
<tt class="descclassname">pNbody.units.</tt><tt class="descname">Set_SystemUnits_From_Params</tt><big>(</big><em>params</em><big>)</big><a class="headerlink" href="#pNbody.units.Set_SystemUnits_From_Params" title="Permalink to this definition"></a></dt>
<dd><p>return a system of units from given parameters</p>
<p>params is a dictionary that must constains at least</p>
<p>params[&#8216;UnitVelocity_in_cm_per_s&#8217;]
params[&#8216;UnitMass_in_g&#8217;]
params[&#8216;UnitLength_in_cm&#8217;]</p>
</dd></dl>
<dl class="class">
<dt id="pNbody.units.UnitSystem">
<em class="property">class </em><tt class="descclassname">pNbody.units.</tt><tt class="descname">UnitSystem</tt><big>(</big><em>UnitSysName</em>, <em>UnitLst</em><big>)</big><a class="headerlink" href="#pNbody.units.UnitSystem" title="Permalink to this definition"></a></dt>
<dd><p>Units system</p>
<p class="rubric">Methods</p>
<dl class="method">
<dt id="pNbody.units.UnitSystem.convertionFactorTo">
<tt class="descname">convertionFactorTo</tt><big>(</big><em>newUnits</em><big>)</big><a class="headerlink" href="#pNbody.units.UnitSystem.convertionFactorTo" title="Permalink to this definition"></a></dt>
<dd><p>return the conversion factor to obtain the new units</p>
</dd></dl>
<dl class="method">
<dt id="pNbody.units.UnitSystem.info">
<tt class="descname">info</tt><big>(</big><big>)</big><a class="headerlink" href="#pNbody.units.UnitSystem.info" title="Permalink to this definition"></a></dt>
<dd><p>print some info</p>
</dd></dl>
<dl class="method">
<dt id="pNbody.units.UnitSystem.into">
<tt class="descname">into</tt><big>(</big><em>newUnits</em><big>)</big><a class="headerlink" href="#pNbody.units.UnitSystem.into" title="Permalink to this definition"></a></dt>
<dd><p>return into the new units</p>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="pNbody.units.Units">
<em class="property">class </em><tt class="descclassname">pNbody.units.</tt><tt class="descname">Units</tt><big>(</big><em>symbol</em>, <em>factor=1.0</em>, <em>power=1</em>, <em>ulist=</em><span class="optional">[</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#pNbody.units.Units" title="Permalink to this definition"></a></dt>
<dd><p>Units</p>
<p class="rubric">Methods</p>
<dl class="method">
<dt id="pNbody.units.Units.GatherBaseUnits">
<tt class="descname">GatherBaseUnits</tt><big>(</big><big>)</big><a class="headerlink" href="#pNbody.units.Units.GatherBaseUnits" title="Permalink to this definition"></a></dt>
<dd><p>create the self.bases list (recursively)</p>
</dd></dl>
</dd></dl>
<dl class="data">
<dt id="pNbody.units.gal">
<tt class="descclassname">pNbody.units.</tt><tt class="descname">gal</tt><a class="headerlink" href="#pNbody.units.gal" title="Permalink to this definition"></a></dt>
<dd><p>constantes are now defined in ctes.py</p>
<p>slight = PhysCte(2.99792458e8,Unit_m/Unit_s)
G = PhysCte(6.6732e-11,Unit_G)
q_electron = PhysCte(1.6022e-19,Unit_C)
planck = PhysCte(6.6262e-34,Unit_J*Unit_s)
boltzmann = PhysCte(1.3807e-23,Unit_J/Unit_K)
m_electron = PhysCte(9.1095e-31,Unit_kg)
m_proton = PhysCte(1.6726e-27,Unit_kg)
m_neutron = PhysCte(1.6750e-27,Unit_kg)
Na = PhysCte(6.0220e+23,Unit_mol)
R = PhysCte(8.3144e+00,Unit_J/Unit_mol)
Av = PhysCte(6.828e-50 ,Unit_Pa*Unit_m**6)
Bv = PhysCte(4.419e-29,Unit_m**3)</p>
</dd></dl>
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