A5047657532- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Superconducting and THz Device Technology
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Distributed and Parallel Computing Systems
- Spectroscopy and Laser Applications
- Scientific Computing and Data Management
- Impact of Light on Environment and Health
- Scientific Research and Discoveries
- Relativity and Gravitational Theory
- Particle Detector Development and Performance
- Plant Water Relations and Carbon Dynamics
- Solar and Space Plasma Dynamics
- Environmental Monitoring and Data Management
Bloomberg (United States)
2019-2024
Johns Hopkins University
2019-2024
California Institute of Technology
2024
Infrared Processing and Analysis Center
2024
University of California, San Diego
2017-2021
University of Toronto
2016
Canadian Institute for Theoretical Astrophysics
2016
Abstract Quasar-driven galactic outflows are a major driver of the evolution massive galaxies. We report observations powerful galactic-scale outflow in z = 3 extremely red and intrinsically luminous ( L bol ≃ 5 × 10 47 erg s −1 ) quasar SDSSJ1652 + 1728 with Near-infrared Spectrograph on board JWST. analyze kinematics rest-frame optical emission lines identify quasar-driven extending out to ∼10 kpc from velocity offset v r ± 500 km high dispersion (FWHM 700–2400 ). Due JWST’s unprecedented...
Abstract Quasar feedback may regulate the growth of supermassive black holes, quench coeval star formation, and impact galaxy morphology circumgalactic medium. However, direct evidence for quasar in action at epoch peak hole accretion z ≈ 2 remains elusive. A good case point is = 1.6 WISEA J100211.29+013706.7 (XID 2028), where past analyses same ground-based data have come to different conclusions. Here, we revisit this object with integral-field unit Near Infrared Spectrograph on board JWST...
Extremely red quasars, with bolometric luminosities exceeding $10^{47}$ erg s$^{-1}$, are a fascinating high-redshift population that is absent in the local universe. They best candidates for supermassive black holes accreting at rates or above Eddington limit, and they associated most rapid powerful outflows of ionized gas known to date. also hosted by massive galaxies. Here we present first integral field unit (IFU) observations quasar obtained Near Infrared Spectrograph (NIRSpec) on board...
Abstract Massive galaxies formed most actively at redshifts z = 1–3 during the period known as “cosmic noon.” Here we present an emission-line study of extremely red quasar SDSSJ165202.64+172852.3’s host galaxy 2.94, based on observations with Near Infrared Spectrograph integral field unit board JWST. We use standard diagnostic ratios to map sources gas ionization across and a swarm companion galaxies. The dominates photoionization, but also discover shock-excited regions orthogonal cone...
We present the first results from a JWST program studying role played by powerful radio jets in evolution of most massive galaxies at onset cosmic noon. Using NIRSpec integral field spectroscopy, we detected 24 rest-frame optical emission lines z = 3.5892 galaxy 4C+19.71, which contains one energetic known, making it perfect for testing mode feedback on interstellar medium (ISM) M ⋆ ∼ 10 11 ⊙ galaxy. The rich spectrum enables line ratio diagnostics, showing that radiation active galactic...
Quasar-driven outflows must have made their most significant impact on galaxy formation during the epoch when massive galaxies were forming rapidly. To study of quasar feedback we conducted rest-frame optical integral field spectrograph (IFS) observations three extremely red quasars (ERQs) and one type-2 at $z=2-3$, obtained with NIFS OSIRIS instruments Gemini North W. M. Keck Observatory assistance laser-guided adaptive optics. We use kinematics morphologies [OIII] 5007\AA H$\alpha$ 6563\AA...
We present high angular resolution multi-wavelength data of the 3C 298 radio-loud quasar host galaxy (z=1.439) taken using W.M. Keck Observatory OSIRIS integral field spectrograph with adaptive optics, Atacama Large Millimeter/submillimeter Array (ALMA), Hubble Space Telescope (HST) WFC3, and Very (VLA). Extended emission is detected in rest-frame optical nebular lines H$\beta$, [OIII], H$\alpha$, [NII], [SII], as well molecular CO (J=3-2) (J=5-4). Along path 298's relativistic jets we...
Abstract We present observations of ionized gas outflows in 11 z = 1.39–2.59 radio-loud quasar host galaxies. Data were taken with the integral field spectrograph OSIRIS and adaptive optics system at W.M. Keck Observatory targeting nebular emission lines (H β , [O III ], H α [N II [S ]) redshifted into near-infrared (1–2.4 μ m). Outflows velocities 500–1700 km s −1 are detected 10 systems on scales ranging from <1 kpc to outflow rates 8–2400 M ⊙ yr . For five sources, momentum 4–80 times...
Abstract In this Letter, we investigate the turbulence and energy injection in extended nebulae surrounding two luminous obscured quasars, WISEA J100211.29+013706.7 ( z = 1.5933) SDSS J165202.64+172852.3 2.9489). Utilizing high-resolution data from NIRSpec integral field unit onboard James Webb Space Telescope, analyze velocity fields of line-emitting gas around these quasars construct second-order structure functions (VSFs) to quantify turbulent motions across different spatial scales. Our...
In galaxy mergers, dual quasars - two actively accreting supermassive black holes (SMBHs) provide a unique opportunity to study the interplay between dynamics and quasar activity. However, very little is known about their molecular gas, which fuels star formation this study, we map kinematics of cold gas in J0749+2255, 3.8 kpc separation at z=2.17 using Atacama Large Millimeter Array (ALMA) Band 4. We detect CO(4-3)650um, shows remarkably complex morphological kinematic structures. While...
We present spatially resolved dust-continuum ALMA observations from rest-frame $\sim$60 to $\sim$600 $\mu$m (bands 3-10) of the hyperluminous hot dust-obscured galaxy (hot DOG) WISE J224607.6-052634.9 (W2246-0526), at redshift $z=4.6$. W2246-0526 is interacting with least three companion galaxies, forming a system connected by tidal streams. model multiwavelength dust continuum using modified blackbody, which we derive properties (mass, emissivity index, area emitting region, and...
Mergers play important roles in galaxy evolution at and beyond cosmic noon (z∼3). They have been found to be a trigger of active galactic nuclei (AGN) activity process for growing stellar mass black hole mass. High-z radio galaxies (HzRGs=type-2 radio-loud AGN) are among the most massive known, they reside dense environments on scales tens kiloparsecs Megaparsecs. We present first search kiloparsec-scale companions using matched 0.2 resolution ALMA JWST/NIRSpec integral field unit data...
Abstract The search for dual supermassive black holes (SMBHs) is of immense interest in modern astrophysics. Galaxy mergers may fuel and produce SMBH pairs. Actively accreting pairs are observed as quasars, which vital probes growth. Dual quasars at cosmic noon not well characterized. Gaia observations have enabled a novel technique to identify kiloparsec scales based on the small jitters light centroid two vary stochastically. We present first detailed study z = 2.17, 0 <mml:math...
Abstract We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of six radio-loud quasar host galaxies at z = 1.4–2.3. combine the kiloparsec-scale resolution ALMA with high spatial adaptive optics integral field spectrograph data ionized gas. detect molecular gas emission in five and resolve interstellar medium using CO (3–2) or (4–3) rotational transitions. Clumpy outflows are detected four a merger system 21 kpc away from one quasar. Between cold phases, majority...
Abstract Fast accreting, extremely luminous quasars contribute heavily to the feedback process within galaxies. While these systems are most common at cosmic noon ( z ∼ 2), here we choose study PDS 456, an L bol 10 47 erg s −1 ) but nearby 0.185) quasar where physics of can be studied in greater detail. We present results from our analysis JWST MIRI/Medium Resolution Spectroscopy (MRS) integral field spectroscopic (IFS) data this object. The extreme brightness 456 makes it challenging...
Abstract Quasar feedback may play a key role in the evolution of massive galaxies. The dust-reddened quasar F2M110648.35+480712 at z = 0.4352 is one few cases its redshift that exhibits powerful through bipolar outflows. Our new observation with integral field unit mode Near-infrared Spectrograph on board JWST opens window to examine this spectacular outflow Pa α emission line ~3× better spatial resolution than previous work. morphology and kinematics nebula confirm existence extending scale...
We present spatially resolved dust-continuum ALMA observations from rest frame ∼,60 to ∼,600 upmum (bands 3--10) of the hyperluminous hot dust-obscured galaxy (hot DOG) WISE J224607.6--052634.9 (W2246--0526), at redshift z=4.6. W2246--0526 is interacting with least three companion galaxies, forming a system connected by tidal streams. model multiwavelength dust continuum using modified blackbody, which we derive properties (mass, emissivity index, area emitting region, and temperature) in...
Abstract We present results for 19 galaxies in the redshift range 1.2 ≲ z 2.6 to model star formation rate (SFR) and stellar mass using galactic spectral energy distributions. With W. M. Keck Observatory MOSFIRE we spectroscopically confirm redshifts lines of H α , which are further used SFR calculations. Our observed modeled SFRs reasonable agreement, validating parameters produced by application Code Investigating GALaxy Emission population synthesis software observations high-redshift galaxies.
OSIRIS is a near-infrared (1.0--2.4 $\mu$m) integral field spectrograph operating behind the adaptive optics system at Keck Observatory, and one of first lenslet-based spectrographs. Since its commissioning in 2005, it has been productive instrument, producing nearly half laser guide star (LGS AO) papers on Keck. The complexity raw data format necessitated custom reduction pipeline (DRP) delivered with instrument order to iteratively assign flux overlapping spectra proper spatial spectral...
Abstract The [O iii ] 5007 Å emission line is the most common tracer of warm, ionized outflows in active galactic nuclei across cosmic time. JWST newly allows us to use mid-IR spectral features at both high spatial and resolution probe these same winds. Here we present a comparison ground-based, seeing-limited space-based, diffraction-limited [S iv 10.51 μ m maps powerful, kiloparsec-scale outflow Type 1 red quasar SDSS J110648.32+480712.3. data are from Mid-InfraRed Instrument. There close...
Abstract Dual quasars—two active supermassive black holes at galactic scales—represent crucial objects for studying the impact of galaxy mergers and quasar activity on star formation rate (SFR) within their host galaxies, particularly cosmic noon when SFR peaks. We present JWST/MIRI mid-infrared integral field spectroscopy J074922.96+225511.7, a dual with projected separation 3.8 kpc redshift z = 2.17. detect spatially extended [Fe ii ] 5.34 μ m polycyclic aromatic hydrocarbon (PAH) 3.3...
We present integral field spectrograph (IFS) with laser guide star adaptive optics (LGS-AO) observations of z=2 quasi-stellar objects (QSOs) designed to resolve extended nebular line emission from the host galaxy. Our data was obtained W. M. Keck and Gemini-North Observatories using OSIRIS NIFS coupled LGS-AO systems. have conducted a pilot survey five QSOs, three observed NIFS+AO two OSIRIS+AO at an average redshift z=2.15. demonstrate that combination AO IFS provides necessary spatial...
Massive galaxies formed most actively at redshifts $z=1-3$ during the period known as `cosmic noon.' Here we present an emission-line study of extremely red quasar SDSSJ165202.64+172852.3 host galaxy $z=2.94$, based on observations with Near Infrared Spectrograph (NIRSpec) integral field unit (IFU) board JWST. We use standard diagnostic ratios to map sources gas ionization across and a swarm companion galaxies. The dominates photoionization, but also discover shock-excited regions orthogonal...
We investigate star forming scaling relations using Bayesian inference on a comprehensive data sample of low- (z<0.1) and high-redshift (1<z<5) regions. This full set spans wide range host galaxy stellar mass ($M_{*} \sim10^6-10^{11} M_{\odot}$) clump formation rates (SFR $ \sim10^{-5}-10^2 M_\odot yr^{-1}$). fit the power-law relationship between size (r$_{H\alpha}$) luminosity (L$_{H\alpha}$) clumps statistical modeling tool Stan that makes use Markov Chain Monte Carlo (MCMC) sampling...
ABSTRACT We report on deep XMM–Newton and NuSTAR observations of the high redshift, z = 2.94, extremely red quasar (ERQ), SDSS J165202.60+172852.4, with known galactic ionized outflows detected via spatially resolved [O iii] emission lines. X-ray allow us to directly probe accretion disc luminosity geometry scale circumnuclear obscuration. fit spectra from XMM–Newton/EPIC detectors a physically motivated torus model constrain source exhibit near Compton-thick column density NH...