Grey Murphree
A5014744486- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- History and Developments in Astronomy
- Astronomical Observations and Instrumentation
- Historical and Architectural Studies
- Historical Astronomy and Related Studies
- Receptor Mechanisms and Signaling
- Hippo pathway signaling and YAP/TAZ
- Non-Invasive Vital Sign Monitoring
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Cardiac Imaging and Diagnostics
- Cancer, Hypoxia, and Metabolism
- Pulsars and Gravitational Waves Research
- Biblical Studies and Interpretation
University of Hawaii System
2023-2024
University of Wyoming
2021-2024
Rhodes College
2021-2024
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...
In this third paper of the series reporting on reverberation mapping (RM) campaign active galactic nuclei with asymmetric H$\beta$ emission-line profiles, we present results for 15 Palomar-Green (PG) quasars using spectra obtained between end 2016 to May 2021. This combines long time spans relatively high cadence. For 8 objects, both lags from entire light curves and measurements individual observing seasons are provided. Reverberation 9 our targets has been attempted first time, while 6...
We report the results of long-term reverberation mapping (RM) campaigns nearby active galactic nuclei (AGN) NGC 4151, spanning from 1994 to 2022, based on archived observations FAST Spectrograph Publicly Archived Programs and our new with 2.3m telescope at Wyoming Infrared Observatory. reduce calibrate all spectra in a consistent way, derive light curves broad H$\beta$ line 5100\,{\AA} continuum. Continuum are also constructed using public archival photometric data increase sampling...
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...
Abstract We report first-time reverberation-mapping results for 14 active galactic nuclei (AGNs) from the ongoing Monitoring AGNs with H β Asymmetry campaign (MAHA). These utilize optical spectra obtained Long Slit Spectrograph on Wyoming Infrared 2.3 m Telescope between 2017 November and 2023 May. MAHA combines long-duration monitoring high cadence. multiple observing seasons nine of objects. include time lags, supermassive black hole masses, velocity-resolved lags. The lags allow us to...
We present the results of photometric and spectroscopic monitoring campaigns changing look AGN NGC 3516 carried out in 2018 to 2020 covering wavelength range from X-ray optical. The facilities included telescopes CMO SAI MSU, 2.3-m WIRO telescope, XRT UVOT Swift. found that brightened a high state could be classified as Sy1.5 during late spring 2020. have measured time delays responses Balmer He II 4686 lines continuum variations. In case best-characterized broad H-beta line, delay...
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...
The Cosmic Dawn Survey (DAWN survey) provides multiwavelength (UV/optical to mid-IR) data across the combined 59 deg 2 of Euclid Deep and Auxiliary fields (EDFs EAFs). In this work, first public release from DAWN survey is presented. catalogues made available herein consist a subset full that includes two EDFs: EDF North (EDF-N) Fornax (EDF-F). Each field has been covered by ongoing Hawaii Twenty Square Degree (H20), which imaging CFHT MegaCam in u filter Subaru Hyper Suprime-Cam (HSC) griz...
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...
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...
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 (NIRSpec) on board James...
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 quasar through bipolar outflows. Our new observation with integral field unit mode Near-infrared Spectrograph onboard JWST opens window to examine this spectacular outflow Pa$\alpha$ emission line $\sim$3$\times$ better spatial resolution than previous work. morphology and kinematics nebula confirm...
We observe neither life beyond Earth, nor moons around exoplanets, despite the prevalence of Earth-like planets across galaxy. suggest Moonfall as a possible mechanism to explain both simultaneously.
The [OIII] 5007 A 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-infrared 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 [SIV] 10.51 micron maps powerful, kiloparsec-scale outflow Type 1 red quasar SDSS J110648.32+480712.3. data are from Mid-InfraRed Instrument (MIRI). There...
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, intrinsically luminous ($L_{\rm bol}\simeq 5\times 10^{47}$erg s$^{-1}$) quasar SDSSJ1652+1728 with Near Infrared Spectrograph (NIRSpec) on board JWST. analyze kinematics rest-frame optical emission lines and identify quasar-driven extending out to $\sim 10$ kpc from velocity offset ($v_{r}=\pm 500$ km high dispersion...