Time Domain

Automatic Classification of ZTF + LSST Light Curves

Advisors: Dr. Daniela Huppenkothen + Prof. Mario Juric



As a graduate student at the University of Washington, my research involves using unsupervised classification techniques to reveal strange and potentially unforeseen objects among time series data. I collaborate with the Zwicky Transient Facility (ZTF) and the Dirac Institute.

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Galaxies

Cosmic High Noon: Declining Galactic Star Formation Rates

Advisors: Dr. Stephanie Juneau + Dr. Mark Dickinson



As a Data Reduction Specialist at NOAO, I investigated how galactic star-formation rates evolve with redshift (z < 1.5), internal galactic properties, and environmental conditions in order to understand the physical causes responsible for the decline of the cosmic star formation history. My role specifically involved performing multi-object spectroscopic data reduction using an interactive graphical interface pipeline in order to produce a catalog of redshifts for our sample. Image source: Madau & Dickinson (2014).

Incoming! Evolutionary Trends in Virgo Cluster Galaxies

Advisor: Prof. Jeff Kenney



As a Yale Dorrit Hoffleit Research Scholar, I explored systematic trends in the star formation rates of Virgo Cluster galaxies to ultimately investigate the effects of cosmological structure on galaxy evolution. I first merged ultraviolet-through-infrared archival photometry for 50 Virgo galaxies (data from SDSS, 2MASS, Spitzer, and Herschel), then modeled the observational data with theoretical SEDs (models from Magphys). We found that in the mass range 109-1010 M☉, the galaxies with the highest specific star formation rates were all HI-rich, subject to ongoing gas accretion, and located at the outskirts of the cluster. Our findings reveal HI accretion as a potentially significant stage of infalling galaxy evolution. Poster.

NGC 5523: An Isolated Product of Soft Galaxy Mergers?

Advisor: Prof. Jay Gallagher



My first undergraduate project focused on the morphology and evolution of isolated galaxies, which generally offer key insight into the formation of the first galaxy systems. The galaxy NGC 5523 demonstrates a paradoxical combination of global isolation (no massive companions) and asymmetrical features indicative of past interactions. By analyzing multi-band images from Spitzer and WIYN, we found that the asymmetrical features in NGC 5523 most likely arose from one or more non-disruptive mergers between it and former companion galaxies. Our result challenges the typical narrative that isolated galaxies evolve with few galactic interactions. (Fulmer, Gallagher, & Kotulla, 2017, A&A, 598, A119).

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Stars + Gas

Photometry of stellar populations associated with the SMC-SGS 1

Advisor: Prof. Jay Gallagher



The SMC Wing exhibits ongoing, active star formation despite a distinctive lack of dense interstellar matter, or resources from which to form stars. For my Honors Undergraduate Senior Thesis, I sought to uncover the driving forces behind such intriguing star formation through an extended photometric study of the SMC Wing. Our photometric, spectral, and spatial analyses reveal evidence for a significant star-forming event that occurred ~30-50 Myr ago, creating ~104 M☉ of new stars and initiating sequential star formation that continues into the present. The spatial and temporal distribution of young stars in the SMC Wing indicate that star formation proceeded slowly and consistently over millions of years. Continued stellar production within the volume of SGS~1 suggests a stochastic star formation mode in which molecular clouds survive shell passage, slow the expansion of the shell, and only later form stars. Poster (AAS Chambliss Award, Honorable Mention).

Star Stuff: Physical Properties of Molecular Clouds in the Magellanic Bridge

Advisor: Prof. Monica Rubio



At the University of Chile, I characterized physical properties of molecular clouds in the Magellanic Bridge to ultimately reevaluate the necessary conditions for stellar birth. Using observations from ALMA and APEX, I analyzed sub-millimeter CO emission via CASA Gaussian fit distribution modeling. Our results estimated the size, temperature, luminosity, and mass of clouds covering one-third of the Bridge, thus establishing a foundation to interrogate stellar evolution within low-density environments. From my experience in Chile, I not only learned the technical skills of radio observation and spectral data reduction, but also initiated scientific collaborations with one of the leading countries in observational astronomy.

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Telescopes + Software

Software Development for the Hubble and James Webb Space Telescopes

Advisor: Dr. Mark Giuliano



With the STScI Space Astronomy Summer Program (SASP), I developed software for the HST and JWST SPIKE observation scheduling systems. Specifically, I created a dynamic visualization tool for the analysis of temporal scheduling constraints, as primarily used by SPIKE Developers and SPIKE Users. The tool is designed to be lightweight (fast, computationally inexpensive), interactive (supporting zooming, scrolling, dynamic time information displays), and independent (producing a stand-alone web page) for optimized functionality and communication among users. Presentation (55:15 - 1:04:34).

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i = 0;

while (!deck.isInOrder()) {
    print 'Iteration ' + i;
    deck.shuffle();
    i++;
}

print 'It took ' + i + ' iterations to sort the deck.';

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  • Dolor pulvinar etiam.
  • Sagittis adipiscing.
  • Felis enim feugiat.

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  2. Etiam vel felis viverra.
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Name Description Price
Item One Ante turpis integer aliquet porttitor. 29.99
Item Two Vis ac commodo adipiscing arcu aliquet. 19.99
Item Three Morbi faucibus arcu accumsan lorem. 29.99
Item Four Vitae integer tempus condimentum. 19.99
Item Five Ante turpis integer aliquet porttitor. 29.99
100.00

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Item One Ante turpis integer aliquet porttitor. 29.99
Item Two Vis ac commodo adipiscing arcu aliquet. 19.99
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Item Four Vitae integer tempus condimentum. 19.99
Item Five Ante turpis integer aliquet porttitor. 29.99
100.00

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