Publication
Clean Optical Spectrum of the Radio Jet of 3C 120
We present integral field spectroscopy (IFS) of the central region of 3C 120. We have modeled the nuclear and host galaxy three-dimensional spectra using...
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PublicationClose Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude DiagramMany problems in contemporary astrophysics—from understanding the formation of black holes to untangling the chemical evolution of galaxies—rely on knowledge...
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PublicationClose Galaxy Counts as a Probe of Hierarchical Structure FormationThe standard ΛCDM model predicts that the major merger rate of galaxy-size dark matter halos rises rapidly with redshift. The average number of close companions...
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PublicationCNO Abundances of Hydrogen-Deficient Carbon and R Coronae Borealis Stars: A View of the Nucleosynthesis in a White Dwarf MergerWe present high-resolution (R ~ 50, 000) observations of near-IR transitions of CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R...
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PublicationCO (3-2) Observations of Early-Type Galaxies with the Heinrich Hertz TelescopeWe present Heinrich Hertz Telescope CO (3-2) observations of a sample of 10 early-type galaxies detected both in far-infrared (IRAS) and in CO (1-0). Six of the...
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PublicationCO Excitation, Molecular Gas Density, and Interstellar Radiation Field in Local and High-redshift GalaxiesWe study the carbon monoxide (CO) excitation, mean molecular gas density, and interstellar radiation field (ISRF) intensity in a comprehensive sample of 76...
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PublicationCo-spatial Long-slit UV/Optical AL Spectra of 10 Galactic Planetary Nebulae with HST/STIS. I. Description of the Observations, Global Emission-line Measurements, and CNO AbundancesWe present observations and initial analysis from a Hubble Space Telescope (HST) Cycle 19 program using STIS to obtain the first co-spatial, UV–optical spectra...
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PublicationCo-spatial Long-slit UV/Optical Spectra of Ten Galactic Planetary Nebulae with HST/STIS. II. Nebular Models, Central Star Properties, and He+CNO SynthesisThe goal of the present study is twofold. First, we employ new HST/STIS spectra and photoionization modeling techniques to determine the progenitor masses of...
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PublicationCOBIPULSE: A Systematic Search for Compact Binary Millisecond PulsarsWe report here the results obtained from a systematic optical photometric survey aimed at finding new compact binary millisecond pulsars (also known as "spiders...