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---
layout: page
title: Lingfeng Wei
permalink: /
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          <h1 class="animated fadeInUp">LINGFENG WEI</h1>
          <p class="animated fadeInUp">GRADUATE STUDENT AT UCSD</p>
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            <h2>About Me</h2>
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          <p>I am currently a graduate student at the <a href="https://cass.ucsd.edu/index.php/Main_Page" target="_blank">Center of Astrophysics and Space Sciences</a>, University of California, San Diego. My research interests extends broadly in both theoretical and observational topics in astronomy. Currently, I am working on stellar kinematics at The Orion Nebula with <a href="http://konopackygroup.ucsd.edu/" target="_blank">Prof. Konopacky</a>, using the observational data acquired from the <a href="http://www.keckobservatory.org/" target="_blank">W. M. Keck Observatory</a>. Previously, I also worked on simulations and theories of long-time evolution of exoplanets with <a href="http://www.astro.ucla.edu/~snaoz/" target="_blank">Prof. Naoz</a> at University of California, Los Angeles.</p>
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        <h2>Research</h2>
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        <a href="#">Stability of Hierarchical Planet Systems</a>
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      <p>
        Planet’s long-time (secular) orbital evolution are affected by various dynamical processes. In a system with two close inner earth-sized planets and a massive outer companion, we try to predict the stability of such a hierarchical system from its initial conditions. By considering the star-planet, planet-planet and distant companion-planet interaction, we present an analytical criterion of whether a system is stable in a long period of time. These three interactions are described by general relativity, Laplace-Lagrange secular theory and eccentric Kozai-Lidov effect, respectively. This result spares us from the redundancy to run computation-consuming simulations, and serve as a potential method to predict the existence of undiscovered distant companions from the behavior of observed planets.
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        <a href="#">Kinematic Map of Orion Nebula Cluster</a>
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        We seek to build a three-dimensional kinematic map of the stars near the center of Orion Nebula Cluster using the observational data from the W. M. Keck Observatory. As Orion Nebula Cluster is the nearest site of ongoing massive star formation, this would help us better understand the formation of stars.
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        <h2>Contact</h2>
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      <p>University of California, San Diego<br>Center for Astrophysics and Space Sciences<br>9500 Gilman Drive<br>La Jolla, CA 92039-0424<br></p>
      <p>Email: <a href="mailto:l3wei@ucsd.edu" style="font-weight: bold;";>l3wei@ucsd.edu</a></p>
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