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  <section id="module-kerrgeodesic_gw.astro_data">
<span id="astronomical-data"></span><h1>Astronomical data<a class="headerlink" href="#module-kerrgeodesic_gw.astro_data" title="Permalink to this headline">¶</a></h1>
<p>Astronomical data.</p>
<p>Having imported the <code class="docutils literal notranslate"><span class="pre">astro_data</span></code> module, type</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">astro_data.&lt;TAB&gt;</span></code>, where <code class="docutils literal notranslate"><span class="pre">&lt;TAB&gt;</span></code> stands for the tabulation key,
to get the list of available data</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">astro_data.??</span></code> to see the sources of the numerical values</p></li>
</ul>
<p>EXAMPLES:</p>
<p>Fundamental constants (in SI units):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="kn">from</span> <span class="nn">kerrgeodesic_gw</span> <span class="kn">import</span> <span class="n">astro_data</span>
<span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">G</span>
<span class="mf">6.6743e-11</span>
<span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">c</span>
<span class="mf">299792458.0</span>
</pre></div>
</div>
<p>Solar mass in kg:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">solar_mass_kg</span>
<span class="mf">1.98848e+30</span>
</pre></div>
</div>
<p>Solar mass in meters (geometrized units):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">solar_mass_m</span>  <span class="c1"># tol 1.0e-13</span>
<span class="mf">1476.6771171937082</span>
</pre></div>
</div>
<p>Solar mass in seconds (geometrized units):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">solar_mass_s</span>  <span class="c1"># tol 1.0e-13</span>
<span class="mf">4.925664664965348e-06</span>
</pre></div>
</div>
<p>Mass of Sgr A* in solar masses:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">SgrA_mass_sol</span>
<span class="mf">4100000.0</span>
</pre></div>
</div>
<p>Mass of Sgr A* in kg:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">SgrA_mass_kg</span>  <span class="c1"># tol 1.0e-13</span>
<span class="mf">8.152768e+36</span>
</pre></div>
</div>
<p>Mass of Sgr A* in meters (geometrized units):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">SgrA_mass_m</span>  <span class="c1"># tol 1.0e-13</span>
<span class="mf">6054376180.4942045</span>
</pre></div>
</div>
<p>Mass of Sgr A* in seconds (geometrized units):</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">SgrA_mass_s</span>  <span class="c1"># tol 1.0e-13</span>
<span class="mf">20.19522512635793</span>
</pre></div>
</div>
<p>Distance to Sgr A* in parsecs and meters, respectively:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">SgrA_distance_pc</span>
<span class="mf">8120.0</span>
<span class="n">sage</span><span class="p">:</span> <span class="n">astro_data</span><span class="o">.</span><span class="n">SgrA_distance_m</span>  <span class="c1"># tol 1.0e-13</span>
<span class="mf">2.5055701961709902e+20</span>
</pre></div>
</div>
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