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<!DOCTYPE HTML>
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<li><a href="#intro">Welcome</a></li>
<li><a href="#one">Research</a></li>
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<li><a href="#three">About Me & Contacts</a></li>
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<h1><font color="#b74e91">Kaew</font> Samaporn Tinyanont</h1>
<p>
I am a Staff Researcher as the <a href=https://narit.or.th/>National Astronomical Research Institute of Thailand</a>.
Prior to this position, I was a postdoctoral scholar at <font color = "#fdc700">University of California, Santa Cruz</font>, working with <a href="https://www.astro.ucsc.edu/faculty/index.php?uid=foley">Ryan Foley</a> as part of the <a href="https://transients.ucsc.edu/">UCSC Transients Team</a> and the <a href="https://yse.ucsc.edu/">Young Supernova Experiment (YSE)</a>.
I am interested in the life and death of massive stars, how they lose mass and die in the spectacular core-collapse supernovae.
I was previously a graduate student in astronomy at <font color = "#FF6C0C">California Institute of Technology</font>.
I studied supernovae and other stellar eruptions and explosions using various tools in the infrared with <a href="http://astro.caltech.edu/~mansi">Mansi Kasliwal</a>.
I built one of those tools, a low-resolution spectropolarimeter called WIRC+Pol, with <a href="http://astro.caltech.edu/~dmawet">Dimitri Mawet</a> to probe the shape of supernovae, dust producing massive stars, clouds and haze in atmospheres of brown dwarfs, and more. See my research summary on this website or click below for my ADS publication list and my CV.
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<a href="https://ui.adsabs.harvard.edu/search/fq=%7B!type%3Daqp%20v%3D%24fq_database%7D&fq_database=database%3A%20astronomy&p_=0&q=author%3A(%22%5ETinyanont%2C%20S%22)&sort=date%20desc%2C%20bibcode%20desc" class="button">My publications on ADS</a>
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<a href="docs/cv.pdf" class="button">My CV</a>
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<h2>Education</h2>
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<li>PhD in Astrophysics May 2020, California Institute of Technology</li>
<li>MS in Astrophysics 2017, California Institute of Technology</li>
<li>BS in Physics 2015, Harvey Mudd College</li>
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<h2>Supernova Polarization in the Infrared</h2>
<p>Spectropolarimetry has revealed asymmetry in the supernova ejecta, but where is this asymmetry? Theoretical simulations show that the explosion mechanism of core-collapse supernovae is highly asymmetric, affecting the center part of the ejecta. While optical polarization likely arises from electron scattering in the center of the ejecta, it could also be from dust scattering in the circumstellar medium. Infrared observations can break this degeneracy since dust scattering is less effective at these wavelengths. I conducted a survey of brightest supernovae with WIRC+Pol to produce the first catalog of supernova polarization in the near-infrared and detected polarization from a peculiar Type II SN 2018hna. Read the paper <a href="https://ui.adsabs.harvard.edu/abs/2021NatAs...5..544T/abstract">here</a>.</p>
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<h2>Infrared Spectropolarimetry with WIRC+Pol</h2>
<p>Spectropolarimetry is a powerful but underutilized tool in observational astronomy. It provides information on the geometry of astrophysical sources even though they are unresolved by comparing intensity of light along different electric field orientations.
WIRC+Pol is a new low-resolution near-infrared spectropolarimeter at the prime focus of the mighty 200-inch Hale Telescope at Palomar Observatory. I lead the development of the Data Reduction Pipeline for WIRC+Pol. I also designed the slit mask of the instrument and helped with commissioning and designing best observational practices for the instrument. Read the paper <a href="https://ui.adsabs.harvard.edu/abs/2019PASP..131b5001T/abstract">here</a>.</p>
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<h2>Dust and Molecules Around Core-Collapse Supernovae</h2>
<p>Massive stars end their lives in energetic core-collapse supernovae. After the initial firework has settled, the ejecta expand and cool, allowing dust and molecules to form. I use infrared observations from 1-10 μm to monitor these massive stellar deaths from before the explosion until several years after. The rarity of these observations mean that everytime we look, there is something new and surprising. For SN 2017eaw, I found evidence for close in CSM from a high-velocity helium absoprtion feature, albeit no signs of variability from a mass ejection event in the progenitor star in the last year pre-explosion. I also found the carbon monoxide emission profile and evolution that are similar to that in SN 1987A. For SN 2014C, I found sign of silicate dust emission at 10 micron; first time for an interacting supernova. Observations point to a binary progenitor system with detached CSM ring or shell, much like that around RY Scuti. Read the paper <a href="https://ui.adsabs.harvard.edu/abs/2019ApJ...887...75T/abstract">here</a>.
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<h2>Outreach Activities</h2>
<p>Diffusing knowledge to the public is as important as gaining them. After all, they paid for our research!
I am getting involved with the outreach efforts at UC Santa Cruz.
I was an active member of the Caltech Astronomy outreach team and have served as event organizer, speaker, Q&A panel member, photographer, and telescope operator.
Our event schedule could be found <a href="http://www.astro.caltech.edu/outreach/">here</a>. You can watch my public talk on brown dwarfs below.
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<h2>About Me</h2>
<p>
I am originally from Thailand, where a nickname unrelated to the first name is common. <i>Samaporn</i> is my legal first name and the name used in my publications. However, I go by my nickname <i>Kaew</i>, which was given by my parents and have nothing to do with my first name. The last name is <i>Tinyanont</i>, and in Thailand we almost never use last name to address anyone ever.
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<h2>Get in touch</h2>
<p>Please contact me via email if you have any questions about my work!</p>
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<h3>Email</h3>
samaporn [at] narit.or.th
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<h3>Mailing Address</h3>
<span>National Astronomical Research Institute of Thailand<br />
260 Moo 4, T. Donkaew, A. Maerim <br />
Chiangmai, 50180<br />
Thaland</span>
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