A5065764349- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
- Superconducting and THz Device Technology
- Adaptive optics and wavefront sensing
- Dark Matter and Cosmic Phenomena
- Calibration and Measurement Techniques
- Photocathodes and Microchannel Plates
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Scientific Research and Discoveries
- Semiconductor Lasers and Optical Devices
- Advanced MRI Techniques and Applications
- Optical Polarization and Ellipsometry
Kavli Institute for Particle Astrophysics and Cosmology
2021-2025
Stanford University
2021-2025
University of South Carolina
2024-2025
Ames Research Center
2017-2022
Universities Space Research Association
2019-2022
The University of Texas at Austin
2015-2018
The University of Texas at San Antonio
2013-2018
University of California, Davis
2018
National Astronomical Observatory of Japan
2018
National Institutes of Natural Sciences
2018
High-resolution Airborne Wide-band Camera (HAWC[Formula: see text]) is the facility far-infrared imager and polarimeter for SOFIA, NASA’s Stratospheric Observatory Infrared Astronomy. It designed to cover portion of infrared spectrum that completely inaccessible ground-based observatories which essential studies astronomical sources with temperatures between tens hundreds degrees Kelvin. Its ability make polarimetric measurements aligned dust grains provides a unique new capability studying...
We present the first results of Galaxy Activity, Torus and Outflow Survey (GATOS), a project aimed at understanding properties dusty molecular tori their connection to host galaxy in nearby Seyfert galaxies. Our expands range AGN luminosities Eddington ratios covered by previous surveys Seyferts conducted ALMA allows us study gas feeding feedback cycle combined sample 19 Seyferts. used obtain new images emission dust using CO(3-2) HCO+(4-3) lines as well underlying continuum 870 microns with...
The ionisation cones of NGC 5728 have a deficit molecular gas based on millimetre observations CO (2-1) emission. Although photoionisation from the active nucleus may lead to suppression this transition, warm can still be present. We report detection eight mid-infrared rotational H 2 lines throughout central kiloparsec, including cones, using integral field spectroscopic with JWST/MIRI MRS. line ratios, characteristic power-law temperature distribution, indicate that is warmest where it...
Abstract Understanding the role that magnetic fields play on stage of galaxy formation requires accurate methods for inferring properties extragalactic fields. Radio synchrotron emission has been most promising avenue to infer field strengths across galaxies, with application a central assumption: galactic cosmic rays are in energy equipartition field. In this work, we leverage flexible synthetic observations high-resolution magnetohydrodynamic simulation Milky Way–like review whether true...
We present results from the fitting of infrared (IR) spectral energy distributions 21 active galactic nuclei (AGNs) with clumpy torus models. compiled high spatial resolution (∼0.3–0.7 arcsec) mid-IR (MIR) N-band spectroscopy, Q-band imaging, and nuclear near- MIR photometry literature. Combining these observations, far-IR photometry, models enables us to put constraints on properties geometry. divide sample into three types according broad line region (BLR) properties: type-1s, type-2s...
Magnetic fields are fundamental to the evolution of galaxies, playing a key role in astrophysics interstellar medium and star formation. Large-scale ordered magnetic have been mapped Milky Way nearby but it is not known how early Universe such structures form. Here we report detection linearly polarized thermal emission from dust grains strongly lensed, intrinsically luminous galaxy that forming stars at rate more than thousand times redshift 2.6, within 2.5 Gyr Big Bang. The arises...
Abstract The heart of the Large Magellanic Cloud, 30 Doradus, is a complex region with clear core-halo structure. Feedback from stellar cluster R136 has been shown to be main source energy creating multiple parsec-scale expanding-shells in outer region, and carving nebula core proximity ionization source. We present morphology strength magnetic fields ( B -fields) Doradus inferred far-infrared polarimetric observations by SOFIA/HAWC+ at 89, 154, 214 μ m. -field complex, showing bending...
We present high-resolution mid-infrared (MIR) imaging, nuclear spectral energy distributions (SEDs), and archival Spitzer spectra for 22 low-luminosity active galactic nuclei (LLAGNs; Lbol ≲ 1042 erg s−1). Infrared (IR) observations may advance our understanding of the accretion flows in LLAGNs, fate obscuring torus at low rates, and, perhaps, star formation histories these objects. However, while comprehensively studied higher-luminosity Seyferts quasars, IR properties LLAGNs have not yet...
We present an atlas of mid-infrared (mid-IR) ~7.5-13micron spectra 45 local active galactic nuclei (AGN) obtained with CanariCam on the 10.4m Gran Telescopio CANARIAS (GTC) as part ESO/GTC large program. The sample includes Seyferts and other low luminosity AGN (LLAGN) at a median distance 35Mpc luminous AGN, namely PG quasars, (U)LIRGs, radio galaxies (RG) 254Mpc. To date, this is largest mid-IR spectroscopic catalog sub-arcsecond resolution (median 0.3arcsec). goal work to give overview...
We compare mid-IR and ALMA far-IR images of 12 nearby Seyferts selected from GATOS. The unresolved emission contributes more than 60% the nuclear in most galaxies. By contrast, 870micron continuum is mostly resolved typically along torus equatorial direction (Paper I, Garcia-Burillo et al. 2021). Eddington ratios hydrogen column densities NH half sample are favorable to launching polar and/or dusty winds, according simulations. Six show extended as traced by NLR perpendicular emission. In a...
Optical and infrared polarization mapping recent Planck observations of the filamentary cloud L1495 in Taurus show that large-scale magnetic field is approximately perpendicular to long axis cloud. We use HAWC+ polarimeter on SOFIA probe complex B211 part Our results reveal a dispersion angles $36^\circ$, about five times measured larger scale by Planck. Applying Davis-Chandrasekhar-Fermi (DCF) method with velocity information obtained from IRAM 30m C$^{18}$O(1-0) observations, we find two...
We present the analysis of magnetic field ($B$-field) structure galaxies measured with far-infrared (FIR) and radio (3 6 cm) polarimetric observations. use first data release Survey on extragALactic magnetiSm SOFIA (SALSA) 14 nearby ($<20$ Mpc) resolved (5 arcsec-18 arcsec; $90$ pc--$1$ kpc) imaging observations using HAWC+/SOFIA from $53$ to $214$ \um. compute pitch angle ($\Psi_{B}$) profiles as a function galactrocentric radius. introduce new alignment parameter ($\zeta$) estimate...
Understanding the physical processes that regulate star formation and galaxy evolution are major areas of activity in modern astrophysics. Nearby galaxies offer unique opportunities to inspect interstellar medium (ISM), (SF), radiative, dynamic magnetic physics great detail from sub-galactic (kpc) scales sub-cloud (sub-pc) scales, quiescent starbursts, field overdensities. In this case study, we discuss breakthroughs area research will be enabled by Atacama Large Aperture Submillimeter...
We study the distribution of cold molecular gas in circumunuclear disks (CND; r ≤ 200 pc) a sample 64 nearby ( D L = 7 − 45 Mpc) disk galaxies – including active galactic nuclei (AGN) and 19 nonAGN for which high-spatial-resolution (median value ≃36 multiline CO interferometer observations have been obtained at millimeter wavelengths with Atacama Large Millimeter Array (ALMA) and/or Plateau de Bure Interferometer (PdBI). decipher whether or not concentration normalized radial change as...
Abstract We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using HAWC+ instrument on Stratospheric Observatory for Infrared Astronomy. present continuum measurements this at 53, 89, 154, 214 μ m angular resolutions 5″, 8″, 14″, 19″ four bands, respectively. The enable computation improved spectral energy distributions region. find that longer wavelengths, inferred magnetic field configuration matches “hourglass” seen in previous studies, indicating...
The recent availability of high-resolution far-infrared (FIR) polarization observations galaxies using HAWC+/SOFIA has facilitated studies extragalactic magnetic fields in the cold and dense molecular disks.We investigate if any significant structural differences are detectable kpc-scale field grand design face-on spiral galaxy M51 when traced within diffuse (radio) interstellar medium (ISM). Our analysis reveals a complex scenario where radio FIR do not necessarily trace same structure. We...
We present the first data release of Survey on extragALactic magnetiSm with SOFIA (SALSA Legacy Program) a set 14 nearby ($<20$ Mpc) galaxies resolved imaging polarimetric observations using HAWC+ from $53$ to $214$ $\mu$m at resolution $5-18$" ($90$ pc $-$ $1$ kpc). introduce definitions and background extragalactic magnetism, scientific motivation sample selection program. Here, we focus general trends in emissive polarization fraction. Far-infrared trace thermal polarized emission...
We describe the data processing of Survey on extragALactic magnetiSm with SOFIA (SALSA Legacy Program). This first release presents 33% (51.34h out 155.7h, including overheads) total awarded time taken from January 2020 to December 2021. Our observations were performed using newly implemented on-the-fly mapping (OTFMAP) technique in polarimetric mode. present pipeline steps obtain homogeneously reduced high-level products maps galaxies for use scientific analysis. approach has a general...
We present a statistical analysis of the properties obscuring material around active galactic nuclei (AGN). This study represents first its kind for an ultra-hard X-ray (14-195keV; Swift/BAT) volume-limited (DL<40 Mpc) sample 24 Seyfert (Sy) galaxies (BCS40 sample) using high angular resolution infrared data and various torus models: smooth, clumpy two-phase models disc+wind models. find that (i.e. without including polar dusty wind component) provide best fits comparable number galaxies,...
Recent high-resolution 53-$\mu$m polarimetric observations from SOFIA/HAWC+ have revealed the inferred plane-of-the-sky magnetic field (B-field) orientation in Galactic center's Circum-Nuclear Disk (CND). The B-field is mostly aligned with steamers of ionized material falling onto Sgr A* at large, differential velocities (shear). In such conditions, estimating strength ``classical" Davis-Chandrasekhar-Fermi (DCF) method does not provide accurate results. We derive a ``modified'' DCF by...
Abstract High-energy neutrinos are detected by the IceCube Observatory in direction of NGC 1068, archetypical type II Seyfert galaxy. The neutrino flux, surprisingly, is more than an order magnitude higher γ -ray upper limits at measured TeV energy, posing tight constraints on physical conditions a production site. We report analysis submillimeter, mid-infrared, and ultraviolet observations central 50 pc 1068 suggest that inner dusty torus region where jet interacts with surrounding...
Abstract The structure of magnetic fields in galaxies remains poorly constrained, despite the importance magnetism evolution galaxies. Radio synchrotron and far-infrared (FIR) polarization polarimetric observations are best methods to measure galactic scale properties beyond Milky Way. We use synthetic a simulated galaxy identify quantify regions, scales, interstellar medium (ISM) phases probed at FIR radio wavelengths. Our studied suite magnetohydrodynamical cosmological zoom-in simulations...
<ns3:p>Understanding the physical processes that regulate star formation and galaxy evolution are major areas of activity in modern astrophysics. Nearby galaxies offer unique opportunities to inspect interstellar medium (ISM), (SF), radiative, dynamic magnetic ( B → ) physics great detail from sub-galactic (kpc) scales sub-cloud (sub-pc) scales, quiescent starbursts, field overdensities. In this case study, we discuss breakthroughs area research will be enabled by Atacama Large Aperture...
We present observations of the type-2 Seyfert NGC7172 obtained with medium-resolution spectrometer (MRS) Mid-Infrared Instrument (MIRI) on board JWST. This galaxy hosts one lowest ionised gas mass outflow rates (Mout~0.005 M/yr) in a sample six AGN similar bolometric luminosities (log Lbol~44erg/s) within Galactic Activity, Torus and Outflow Survey (GATOS). aim to understand properties outflow, mainly using emission lines from neon transitions, that cover broad range ionisation potentials...