Search Results - "Pogge, Richard W."
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CHAOS. III. GAS-PHASE ABUNDANCES IN NGC 5457
Published in The Astrophysical journal (10-10-2016)“…ABSTRACT We present Large Binocular Telescope observations of 109 H ii regions in NGC 5457 (M101) obtained with the Multi-Object Double Spectrograph. We have…”
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CHAOS IV: Gas-phase Abundance Trends from the First Four CHAOS Galaxies
Published in The Astrophysical journal (01-04-2020)“…The chemical abundances of spiral galaxies, as probed by H ii regions across their disks, are key to understanding the evolution of galaxies over a wide range…”
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Characterizing Extreme Emission-line Galaxies. I. A Four-zone Ionization Model for Very High-ionization Emission
Published in The Astrophysical journal (01-12-2021)“…Abstract Stellar population models produce radiation fields that ionize oxygen up to O +2 , defining the limit of standard H ii region models (<54.9 eV). Yet,…”
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CHAOS. II. GAS-PHASE ABUNDANCES IN NGC 5194
Published in The Astrophysical journal (20-07-2015)“…ABSTRACT We have observed NGC 5194 (M51a) as part of the CHemical Abundances of Spirals project. Using the Multi Object Double Spectrographs on the Large…”
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ALFALFA DISCOVERY OF THE MOST METAL-POOR GAS-RICH GALAXY KNOWN: AGC 198691
Published in The Astrophysical journal (10-05-2016)“…ABSTRACT We present spectroscopic observations of the nearby dwarf galaxy AGC 198691. This object is part of the Survey of H i in Extremely Low-Mass Dwarfs…”
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K2 Optical Emission from OJ 287 and Other γ-Ray Blazars on Hours-to-weeks Timescales from 2014 to 2018
Published in The Astrophysical journal (01-07-2023)“…Abstract We present second observations by K2 of OJ 287 and seven other γ -ray active galactic nuclei (AGNs) obtained in 2017–2018, second and third…”
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The LBT satellites of Nearby Galaxies Survey (LBT-SONG): the satellite population of NGC 628
Published in Monthly notices of the Royal Astronomical Society (01-01-2021)“…ABSTRACT We present the first satellite system of the Large Binocular Telescope Satellites Of Nearby Galaxies Survey (LBT-SONG), a survey to characterize the…”
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The Kilodegree Extremely Little Telescope (KELT): A Small Robotic Telescope for Large‐Area Synoptic Surveys
Published in Publications of the Astronomical Society of the Pacific (01-08-2007)“…The Kilodegree Extremely Little Telescope (KELT) project is a survey for planetary transits of bright stars. It consists of a small‐aperture, wide‐field…”
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THE BLACK HOLE MASS OF NGC 4151. II. STELLAR DYNAMICAL MEASUREMENT FROM NEAR-INFRARED INTEGRAL FIELD SPECTROSCOPY
Published in The Astrophysical journal (10-08-2014)“…We present a revised measurement of the mass of the central black hole (M sub(BH)) in the Seyfert 1 galaxy NGC 4151. When our models attempt to fit both the…”
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CHAOS. VIII. Far-ultraviolet Spectra of M101 and the Impact of Wolf–Rayet Stars
Published in The Astrophysical journal (01-08-2024)“…Abstract We investigate the stellar and nebular properties of nine H ii regions in the spiral galaxy M101 with far-ultraviolet (FUV; ∼900–2000 Å) and optical…”
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Mass Production of 2021 KMTNet Microlensing Planets. I
Published in The Astronomical journal (01-11-2022)“…Abstract We inaugurate a program of “mass production” of microlensing planets discovered in 2021 KMTNet data, with the aim of laying the basis for future…”
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The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
Published in The Astrophysical journal (10-06-2006)“…We have obtained high-resolution images of the central regions of 14 reverberation-mapped active galactic nuclei (AGNs) using the Hubble Space Telescope…”
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Supermassive Black Holes in Active Galactic Nuclei. II. Calibration of the Black Hole Mass-Velocity Dispersion Relationship for Active Galactic Nuclei
Published in The Astrophysical journal (10-11-2004)“…We calibrate reverberation-based black hole (BH) masses in active galactic nuclei (AGNs) by using the correlation between BH mass, M sub(BH), and…”
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KMT-2022-BLG-2397: Brown Dwarf at the Upper Shore of the Einstein Desert
Published in The Astronomical journal (01-09-2023)“…Abstract We measure the Einstein radius of the single-lens microlensing event KMT-2022-BLG-2397 to be θ E = 24.8 ± 3.6 μ as, placing it at the upper shore of…”
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Mass Production of 2021 KMTNet Microlensing Planets II
Published in The Astronomical journal (01-03-2023)“…Abstract We continue our program of publishing all planets (and possible planets) found by eye in 2021 Korea Microlensing Telescope Network (KMTNet) online…”
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OGLE-2019-BLG-1180Lb: Discovery of a Wide-orbit Jupiter-mass Planet around a Late-type Star
Published in The Astronomical journal (01-12-2023)“…Abstract We report on the discovery and analysis of the planetary microlensing event OGLE-2019-BLG-1180 with a planet-to-star mass ratio q ∼ 0.003. The event…”
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Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. I. A Reverberation-based Measurement of the Black Hole Mass
Published in The Astrophysical journal (20-10-2005)“…A reverberation-mapping program on NGC 4395, the least luminous known Seyfert 1 galaxy, undertaken with the Space Telescope Imaging Spectrograph on the Hubble…”
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A Reverberation-based Mass for the Central Black Hole in NGC 4151
Published in The Astrophysical journal (10-11-2006)“…We have undertaken a new ground-based monitoring campaign to improve the estimates of the mass of the central black hole in NGC 4151. We measure the lag time…”
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Outliers from the Mass-Metallicity Relation. I. A Sample of Metal-Rich Dwarf Galaxies from SDSS
Published in The Astrophysical journal (01-10-2008)“…We have identified a sample of 41 low-mass high-oxygen abundance outliers from the mass-metallicity relation of star-forming galaxies measured by Tremonti et…”
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