107 citations · 398 across the 18 of their papers we have counts for
18 papers
SOFIA Polarization Spectrum of Three Star-Forming Clouds
Erin G. Cox, Giles Novak, David T. Chuss +6
The dust emission polarization spectrum -- how the polarization percentage changes with wavelength -- serves as a probe of dust grain properties in star-forming regions. In this pa…
First mid-infrared detection and modeling of a flare from Sgr A*
Sebastiano D. von Fellenberg, Tamojeet Roychowdhury, Joseph M. Michail +24
The time-variable emission from the accretion flow of Sgr A*, the supermassive black hole at the Galactic Center, has long been examined in the radio-to-mm, near-infrared (NIR), an…
Modeling the Far-Infrared Polarization Spectrum of a High-Mass Star Forming Cloud
Dennis Lee, Che-Yu Chen, Giles Novak +7
The polarization spectrum, or wavelength dependence of the polarization fraction, of interstellar dust emission provides important insights into the grain alignment mechanism of in…
Multiwavelength Observations of Sgr A*. II. 2019 July 21 and 26
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle +6
We report on the final two days of a multiwavelength campaign of Sgr A* observing in the radio, submillimeter, infrared, and X-ray bands in July 2019. Sgr A* was remarkably active,…
Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode
J. C. Algaba, M. Balokovic, S. Chandra +738
The nearby elliptical galaxy M87 contains one of the only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (…
The origin of dust polarization in the Orion Bar
Valentin J. M. Le Gouellec, B-G Andersson, Archana Soam +8
The linear polarization of thermal dust emission provides a powerful tool to probe interstellar and circumstellar magnetic fields, because aspherical grains tend to align themselve…
Polarized signatures of adiabatically expanding hotspots in Sgr A*'s accretion flow
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle +1
We report 235 GHz linear and circular polarization (LP and CP) detections of Sgr A* at levels of and , respectively, using ALMA. We describe the first full-Sto…
Multi-wavelength Observations of Sgr A*. I. 2019 July 18
Joseph M. Michail, Mark Wardle, Farhad Yusef-Zadeh +1
We present and analyze ALMA submillimeter observations from a multi-wavelength campaign of Sgr A* during 18 July 2019. In addition to the submillimeter, we utilize concurrent mid-I…
Detection of a 20 minute time lag observed from Sgr A* between 8 and 10 GHz with the VLA
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle
We report the detection and analysis of a radio flare observed on 17 April 2014 from Sgr A* at GHz using the VLA in its A-array configuration. This is the first reported simult…
HAWC+ Far-Infrared Observations of the Magnetic Field Geometry in M51 and NGC 891
Terry Jay Jones, Jin-Ah Kim, C. Darren Dowell +29
SOFIA HAWC+ polarimetry at $154~\micron$ is reported for the face-on galaxy M51 and the edge-on galaxy NGC 891. For M51, the polarization vectors generally follow the spiral patter…
Evidence for a jet and outflow from Sgr A*: a continuum and spectral line study
F. Yusef-Zadeh, M. Royster, M. Wardle +4
We study the environment of Sgr A* using spectral and continuum observations with the ALMA and VLA. Our analysis of sub-arcsecond H30alpha, H39alpha, H52alpha and H56alpha line emi…
Observational evidence for rotational desorption of Complex Molecules by radiative torques from Orion BN/KL
Le Ngoc Tram, Hyeseung Lee, Thiem Hoang +5
Complex Organic Molecules (COMs) are believed to form in the ice mantle of dust grains and are released to the gas by thermal sublimation when grain mantles are heated to temperatu…
Far-Infrared Polarization Spectrum of the OMC-1 Star-Forming Region
Joseph M. Michail, Peter C. Ashton, Marc G. Berthoud +12
We analyze the wavelength dependence of the far-infrared polarization fraction toward the OMC-1 star forming region using observations from HAWC+/SOFIA at 53, 89, 154, and 214 m…
Maps of Magnetic Field Strength in the OMC-1 using HAWC+ FIR Polarimetric data
Jordan A. Guerra, David T. Chuss, C. Darren Dowell +4
Far-infrared (FIR) dust polarimetry enables the study of interstellar magnetic fields via tracing of the polarized emission from dust grains that are partially aligned with the dir…
SOFIA/HAWC+ traces the magnetic fields in NGC 1068
E. Lopez-Rodriguez, C. D. Dowell, T. J. Jones +21
We report the first detection of galactic spiral structure by means of thermal emission from magnetically aligned dust grains. Our 89 m polarimetric imaging of NGC 1068 with the…
The far-infrared polarization spectrum of Rho Ophiuchi A from HAWC+/SOFIA observations
Fabio P. Santos, David T. Chuss, C. Darren Dowell +23
We report on polarimetric maps made with HAWC+/SOFIA toward Rho Oph A, the densest portion of the Rho Ophiuchi molecular complex. We employed HAWC+ bands C (89 m) and D (154 …
SOFIA Far Infrared Imaging Polarimetry of M82 and NGC 253: Exploring the Super-Galactic Wind
Terry Jay Jones, C. Darren Dowell, Enrique Lopez Rodriguez +22
We present Far-Infrared polarimetry observations of M82 at 53 and and NGC 253 at , which were taken with HAWC+ in polarimetry mode on the Stratospheric Ob…
HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1
David T. Chuss, B-G Andersson, John Bally +35
We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy (SOFIA).…