A5008199158- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Scientific Research and Discoveries
- CCD and CMOS Imaging Sensors
- Gamma-ray bursts and supernovae
- Advanced Mathematical Modeling in Engineering
- Impact of Light on Environment and Health
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Radiative Heat Transfer Studies
- Neural Networks and Applications
University of Florida
2020-2024
University of Illinois Urbana-Champaign
2017
Abstract We demonstrate that the inference of galaxy stellar masses via spectral energy distribution (SED) fitting techniques for galaxies formed in first billion years after Big Bang carries fundamental uncertainties owing to loss star formation history (SFH) information from very episodes integrated spectra galaxies. While this early can contribute substantially total mass high-redshift systems, ongoing at time detection outshines residual light earlier bursts, hampering determination...
Abstract The primary method for inferring the stellar mass ( M * ) of a galaxy is through spectral energy distribution (SED) modeling. However, technique rests on assumptions such as star formation history (SFH) and dust attenuation law that can severely impact accuracy derived physical properties from SED Here we examine effect assumed SFH has inferred fitting by ground-truthing them against mock observations high-resolution cosmological hydrodynamic simulations. Classically, SFHs are...
Abstract Accurate models of the star formation histories (SFHs) recently quenched galaxies can provide constraints on when and how shut down their formation. The recent development nonparametric SFH promises flexibility required to make these measurements. However, model prior choices significantly affect derived SFHs, particularly for post-starburst (PSBs), which have sharp changes in SFH. In this paper, we create mock PSBs, then use Prospector SED fitting software test well four different...
Over the past decade, rest-frame color-color diagrams have become popular tools for selecting quiescent galaxies at high redshift, breaking color degeneracy between and dust-reddened star-forming galaxies. In this work, we study one such selection tool -- $U-V$ vs. $V-J$ diagram by employing mock observations of cosmological galaxy formation simulations. particular, conduct numerical experiments assessing both trends in properties UVJ space evolution massive as they quench redshifts $z\sim...
Abstract We describe the Studying Quenching in Intermediate- z Galaxies: Gas, <?CDATA ${\rm{angu}}\overrightarrow{L}{\rm{ar}}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi mathvariant="normal">angu</mml:mi> </mml:mrow> <mml:mover accent="true"> <mml:mi>L</mml:mi> <mml:mo stretchy="true">→</mml:mo> </mml:mover> <mml:mspace width="-0.25em" /> mathvariant="normal">ar</mml:mi> </mml:math> momentum, and Evolution (...
Abstract One of the most common methods for inferring galaxy attenuation curves is via spectral energy distribution (SED) modeling, where dust properties are modeled simultaneously with other physical properties. In this paper, we assess ability SED modeling to infer these from broadband photometry, and suggest a new flexible model that greatly improves accuracy curve derivations. To do this, fit mock SEDs generated simba cosmological simulation prospector fitting code. We consider impact...
Abstract In the current era of high- z galaxy discovery with JWST and Atacama Large Millimeter/submillimeter Array, our ability to study stellar populations interstellar medium conditions in a diverse range galaxies at Cosmic Dawn has rapidly improved. At same time, need understand limitations modeling formation processes physical properties order interpret these observations is critical. Here, we challenges dust temperatures, both context forward spectral from hydrodynamical simulation via...
Traditional spectral energy distribution (SED) fitting codes used to derive galaxy physical properties are often uncertain at the factor of a few level owing uncertainties in star formation histories and dust attenuation curves. Beyond this, Bayesian (which is typically SED software) an intrinsically compute-intensive task, requiring access expensive hardware for long periods time. To overcome these shortcomings, we have developed {\sc mirkwood}: user-friendly tool comprising ensemble...
Abstract Observations and simulations have demonstrated that star formation in galaxies must be actively suppressed to prevent the of overly massive galaxies. Galactic outflows driven by stellar feedback or supermassive black hole accretion are often invoked regulate amount cold molecular gas available for future but may not only relevant quenching processes all We present discovery vast tidal features extending up 64 kpc outside a z = 0.646 post-starburst galaxy recently concluded its...
Abstract We present the Cosmic Sands suite of cosmological zoom-in simulations based on simba galaxy formation model in order to study buildup first massive and dusty galaxies early universe. Residing most halos, we find that compact proto-massive undergo nearly continuous mergers with smaller subhalos, boosting star rates (SFRs) stellar mass. The are already appreciably chemically evolved by z = 7, modeled dust masses comparable those inferred from observations same epoch, except for...
Abstract We present JWST and Atacama Large Millimeter/submillimeter Array (ALMA) imaging for the lensing system SPT0418−47, which includes a strongly lensed, dusty, star-forming galaxy at redshift z = 4.225 an associated multiply imaged companion. The NIRCam MIRI observations presented in this paper were acquired as part of Early Release Science program Targeting Extremely Magnified Panchromatic Lensed Arcs Their Extended Star formation (TEMPLATES). This data set provides robust...
In this paper, we demonstrate that the inference of galaxy stellar masses via spectral energy distribution (SED) fitting techniques for galaxies formed in first billion years after Big Bang carries fundamental uncertainties owing to loss star formation history (SFH) information from very episodes integrated spectra galaxies. While early can contribute substantially total mass high-redshift systems, ongoing at time detection outshines residual light earlier bursts, hampering determination...
We present Powderday, a flexible, fast, open-source dust radiative transfer package designed to interface with galaxy formation simulations. Powderday builds on FSPS population synthesis models, Hyperion transfer, and employs yt between different software packages. include our stellar modeling the fly, which allows for significant run-time flexibility in assumed physics. model nebular line emission that can employ either precomputed Cloudy lookup tables (for efficiency), or direct...
In the current era of high-z galaxy discovery with JWST and ALMA, our ability to study stellar populations ISM conditions in a diverse range galaxies at Cosmic Dawn has rapidly improved. At same time, need understand limitations modeling formation processes physical properties order interpret these observations is critical. Here, we challenges dust temperatures, both context forward spectral from hydrodynamical simulation via backwards mock far-infrared emission. Using Simba model for...
We present the Cosmic Sands suite of cosmological zoom-in simulations based on Simba galaxy formation model in order to study build up first massive and dusty galaxies early Universe. Residing most halos, we find that compact proto-massive undergo nearly continuous mergers with smaller subhalos, boosting star rates (SFRs) stellar mass. The are already appreciably chemically evolved by z=10, modeled dust masses comparable those inferred from observations same epoch. track gas accretion onto...
We present JWST and ALMA results for the lensing system SPT0418-47, which includes a strongly-lensed, dusty star-forming galaxy at redshift z=4.225 an associated multiply-imaged companion. NIRCam MIRI imaging observations presented in this paper were acquired as part of Early Release Science program Targeting Extremely Magnified Panchromatic Lensed Arcs Their Extended Star Formation (TEMPLATES). This data set provides robust, mutiwavelength detection stellar light both main (SPT0418A)...