A5027673544- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Particle Accelerators and Free-Electron Lasers
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
University of California, Irvine
2021-2024
San Diego State University
2021
Abstract We present new JWST NIRSpec integral field spectroscopy (IFS) data for the luminous infrared galaxy NGC 7469, a nearby (70.6 Mpc) active with Seyfert 1.5 nucleus that drives highly ionized gas outflow and prominent nuclear star-forming ring. Using superb sensitivity high spatial resolution of instrument IFS, we investigate role in excitation dynamics circumnuclear gas. Our analysis focuses on [Fe ii ], H 2 , hydrogen recombination lines trace radiation/shocked-excited molecular...
Abstract The nearby, luminous infrared galaxy NGC 7469 hosts a Seyfert nucleus with circumnuclear star-forming ring and is thus the ideal local laboratory for investigating starburst–AGN (active galactic nucleus) connection in detail. We present integral-field observations of central 1.3 kpc region obtained JWST Mid-InfraRed Instrument. Molecular ionized gas distributions kinematics at resolution ∼100 pc over 4.9–7.6 μ m are examined to study dynamics influenced by AGN. low-ionization [Fe ii...
The nearby dwarf spiral galaxy NGC 4395 contains a broad-lined active galactic nucleus (AGN) of exceptionally low luminosity powered by accretion onto central black hole very mass ($\sim10^4-10^5$ M$_\odot$). In order to constrain the size optical continuum emission region through reverberation mapping, we carried out high-cadence photometric monitoring in $griz$ filter bands on two consecutive nights 2022 April using four-channel MuSCAT3 camera Faulkes Telescope North at Haleakal\={a}...
Abstract We present the results of a high-cadence spectroscopic and imaging monitoring campaign active galactic nucleus (AGN) NGC 4395. High signal-to-noise-ratio spectra were obtained at Gemini-N 8 m telescope using GMOS integral field spectrograph (IFS) on 2019 March 7 Keck I 10 Low-Resolution Imaging Spectrometer with slit masks 3 April 2. Photometric data number 1 m-class telescopes during same nights. The narrow-line region (NLR) is spatially resolved; therefore, its variable...
Abstract Photoionization modeling of active galactic nuclei (AGN) predicts that diffuse continuum (DC) emission from the broad-line region makes a substantial contribution to total ultraviolet through near-infrared wavelengths. Evidence for this DC component is present in strong Balmer jump feature AGN spectra, and possibly reverberation measurements find longer lags than expected disk alone. However, contains numerous blended features, making it difficult isolate strength. In contrast,...
Abstract The origin of the tight scaling relation between mass supermassive black holes (SMBHs; M BH ) and their host-galaxy properties remains unclear. Active galactic nuclei (AGNs) probe phases ongoing SMBH growth offer only opportunity to measure beyond local Universe. However, determining an AGN's host galaxy's stellar velocity dispersion, σ ⋆ , its galaxy dynamical mass, dyn is complicated by AGN contamination, aperture effects, different morphologies. We select a sample AGNs for which...
The origin of the tight scaling relation between mass supermassive black holes (SMBHs; $M_{\rm BH}$) and their host-galaxy properties remains unclear. Active galactic nuclei (AGNs) probe phases ongoing SMBH growth offer only opportunity to measure BH}$ beyond local Universe. However, determining AGN host galaxy stellar velocity dispersion $\sigma_\star$, dynamical masses dyn}$, is complicated by contamination, aperture effects different morphologies. We select a sample AGNs for which has...
We present new JWST-NIRSpec IFS data for the luminous infrared galaxy NGC7469: a nearby (70.6Mpc) active with Sy 1.5 nucleus that drives highly ionized gas outflow and prominent nuclear star-forming ring. Using superb sensitivity high spatial resolution of JWST instrument NIRSpec-IFS, we investigate role Seyfert in excitation dynamics circumnuclear gas. Our analysis focuses on [Fe ii], H2, hydrogen recombination lines trace radiation/shocked-excited molecular ISM around AGN. through...
The nearby, luminous infrared galaxy (LIRG) NGC 7469 hosts a Seyfert nucleus with circumnuclear star-forming ring and is thus the ideal local laboratory for investigating starburst--AGN connection in detail. We present integral-field observations of central 1.3 kpc region obtained JWST Mid-InfraRed Instrument. Molecular ionized gas distributions kinematics at resolution {\sim}100 pc over 4.9 - 7.6μm are examined to study dynamics influenced by AGN. low-ionization [Fe II] λ5.34μm [Ar λ6.99μm...