A5069397797- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Particle Accelerators and Free-Electron Lasers
University of California, Irvine
2019-2024
Ames Research Center
2024
National Aeronautics and Space Administration
2024
Bay Area Environmental Research Institute
2024
Abstract We present the main results from a long-term reverberation mapping campaign carried out for Seoul National University AGN Monitoring Project (SAMP). High-quality data were obtained during 2015–2021 32 luminous active galactic nuclei (AGNs; i.e., continuum luminosity in range of 10 44–46 erg s −1 ) at regular cadence, 20–30 days spectroscopy and 3–5 photometry. obtain time lag measurements between variability H β emission AGNs; 25 those have best based on our quality assessment,...
Drought conditions affect ozone air quality, potentially altering multiple terms in the O3 mass balance equation. Here, we present a multiyear observational analysis using data collected before, during, and after record-breaking California drought (2011–2015) at O3-polluted locations of Fresno Bakersfield near Sierra Nevada foothills. We separately assess influences on chemical production (PO3) from concentration. show that isoprene concentrations, which are source O3-forming organic...
Abstract We present velocity-resolved reverberation lags of H β for 20 active galactic nuclei (AGNs) from the Seoul National University AGN Monitoring Project. detect unambiguous structures in 12 AGNs, among which eight objects exhibit symmetric structures, two show inflow-like characteristics, and display outflow-like signatures. For we successfully measure different years, revealing evidence evolving broad-line region (BLR) kinematics. By combining our sample with literature lags, find...
Abstract We present molecular gas-dynamical mass measurements of the central black holes in giant elliptical galaxies NGC 4786 and 5193, based on CO (2−1) observations from Atacama Large Millimeter/submillimeter Array (ALMA) Hubble Space Telescope near-infrared imaging. The region each galaxy contains a circumnuclear disk that exhibits orderly rotation with projected line-of-sight velocities ∼270 km s −1 . build models for rotating fit them directly to ALMA data cubes. At 0.″31 resolution,...
Abstract The broad-line region (BLR) size–luminosity relation has paramount importance for estimating the mass of black holes in active galactic nuclei (AGNs). Traditionally, size H β BLR is often estimated from optical continuum luminosity at 5100 Å, while α and its correlation with much less constrained. As a part Seoul National University AGN Monitoring Project, which provides 6 yr photometric spectroscopic monitoring data, we present our measurements lags high-luminosity AGNs. Combined...
Abstract We present 0.″22-resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations of CO(2−1) emission from the circumnuclear gas disk in red nugget relic galaxy PGC 11179. The shows regular rotation, with projected velocities near center 400 km s −1 . assume CO originates a dynamically cold, thin and fit gas-dynamical models directly to ALMA data. In addition, we explore systematic uncertainties by testing impacts various model assumptions on our results. supermassive...
We present 0\farcs{14}-resolution Atacama Large Millimeter/submillimeter Array (ALMA) CO(2$-$1) observations of the circumnuclear gas disk in UGC 2698, a local compact galaxy. The exhibits regular rotation with projected velocities rising to 450 km s$^{-1}$ near galaxy center. fit gas-dynamical models ALMA data cube, assuming CO emission originates from dynamically cold, thin disk, and measured mass supermassive black hole (BH) 2698 be $M_{\mathrm{BH}} = (2.46 \pm{0.07}$ [$1\sigma$ stat]...
We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 2 observations of CO(2-1) emission from the circumnuclear disks in two early-type galaxies, NGC 1380 and 6861. The disk each galaxy is highly inclined ($i\,{\sim}\,75^{\circ}$), projected velocities molecular gas near centers are ${\sim}300\,\mathrm{km \, s^{-1}}$ ${\sim}500\,\mathrm{km fit thin dynamical models to ALMA data cubes constrain masses central black holes (BHs). created host using Hubble Space Telescope images...
Abstract We present 0.″22 resolution CO(2–1) observations of the circumnuclear gas disk in local compact galaxy NGC 384 with Atacama Large Millimeter/submillimeter Array (ALMA). While majority displays regular rotation projected velocities rising to 370 km s −1 , inner ∼0.″5 exhibits a kinematic twist. develop warped gas-dynamical models account for this twist, fit those ALMA data cube, and find stellar mass-to-light ratio H band M / L = 1.34 ± 0.01 [1 σ statistical] ±0.02 [systematic] ⊙...
We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 5 and 6 observations of CO(2$-$1) CO(3$-$2) emission at 0.2''$-$0.3'' resolution in two radio-bright, brightest group/cluster early-type galaxies, NGC 315 4261. The data resolve CO that extends within their black hole (BH) spheres influence ($r_\mathrm{g}$), tracing regular Keplerian rotation down to just tens parsecs from the BHs. projected molecular gas speeds highly inclined ($i>60^\circ$) disks rises least 500 km...
We present molecular gas-dynamical mass measurements of the central black holes in giant elliptical galaxies NGC 4786 and 5193, based on CO(2$-$1) observations from Atacama Large Millimeter/submillimeter Array (ALMA) Hubble Space Telescope near-infrared imaging. The region each galaxy contains a circumnuclear disk that exhibits orderly rotation with projected line-of-sight velocities ${\sim} 270\, \mathrm{km}\,\mathrm{s^{-1}}$. build models for rotating fit them directly to ALMA data cubes....
Dusty circumnuclear disks (CNDs) in luminous early-type galaxies (ETGs) show regular, dynamically cold molecular gas kinematics. For a growing number of ETGs, Atacama Large Millimeter/sub-millimeter Array (ALMA) CO imaging and detailed gas-dynamical modeling facilitate moderate-to-high precision black hole (BH) mass ($M_{BH}$) determinations. From the ALMA archive, we identified subset 26 ETGs with estimated $M_{BH}/M_{\odot} \gtrsim 10^8$ to few $\times$10$^9$ clean kinematics but that...
Abstract Dusty circumnuclear disks (CNDs) in luminous early-type galaxies (ETGs) show regular, dynamically cold molecular gas kinematics. For a growing number of ETGs, Atacama Large Millimeter/sub-millimeter Array (ALMA) CO imaging and detailed gas-dynamical modeling facilitate moderate-to-high precision black hole (BH) mass ( M BH ) determinations. From the ALMA archive, we identified subset 26 ETGs with estimated / ⊙ ≳ 10 8 to few × 9 clean kinematics but that previously did not have...
We present 0$.\!\!^{\prime\prime}{22}$-resolution CO(2$-$1) observations of the circumnuclear gas disk in local compact galaxy NGC 384 with Atacama Large Millimeter/submillimeter Array (ALMA). While majority displays regular rotation projected velocities rising to $370$ km s$^{-1}$, inner $\sim$0\farcs{5} exhibits a kinematic twist. develop warped gas-dynamical models account for this twist, fit those ALMA data cube, and find stellar mass-to-light ratio $H$-band \mlabstract\ supermassive...
We present 0$.\!\!^{\prime\prime}22$-resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations of CO(2$-$1) emission from the circumnuclear gas disk in red nugget relic galaxy PGC 11179. The shows regular rotation, with projected velocities near center 400 km s$^{-1}$. assume CO originates a dynamically cold, thin and fit gas-dynamical models directly to ALMA data. In addition, we explore systematic uncertainties by testing impacts various model assumptions on our results....
The broad line region (BLR) size-luminosity relation has paramount importance for estimating the mass of black holes in active galactic nuclei (AGNs). Traditionally, size H$\beta$ BLR is often estimated from optical continuum luminosity at 5100\angstrom{} , while H$\alpha$ and its correlation with much less constrained. As a part Seoul National University AGN Monitoring Project (SAMP) which provides six-year photometric spectroscopic monitoring data, we present our measurements lags 6...
We present the main results from a long-term reverberation mapping campaign carried out for Seoul National University Active Galactic Nuclei (AGN) Monitoring Project. High-quality data were obtained during 2015-2021 32 luminous AGNs (i.e., continuum luminosity in range of $10^{44-46}$ erg s$^{-1}$) at regular cadence, 20-30 days spectroscopy and 3-5 photometry. obtain time lag measurements between variability H$β$ emission AGNs; twenty-five those have best based on our quality assessment,...