Publications (26)
The Mid-Infrared Emission of M87
E. S. Perlman, R. E. Mason, Christopher Packham +6
We discuss Subaru and Spitzer Space Telescope imaging and spectroscopy of M87 in the mid-infrared from 5-35 um. These observations allow us to investigate mid-IR emission mechanism…
BAT AGN Spectroscopic Survey - XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei
Kohei Ichikawa, Claudio Ricci, Yoshihiro Ueda +10
We quantify the luminosity contribution of active galactic nuclei (AGN) to the 12 m, mid-infrared (MIR; 5-38 m), and the total IR (5-1000 m) emission in the local AGN d…
GATOS. VIII. On the physical origin of the extended MIR emission in AGN
Enrique Lopez-Rodriguez, Cristina Ramos Almeida, Miguel Pereira-Santaella +31
The polar mid-infrared (MIR) emission detected within 10-100s pcs in some active galactic nuclei (AGN) has been associated with dusty winds driven away by radiation pressure. The p…
GTC/CanariCam Mid-IR Polarimetry of Magnetic Fields in Star-Forming Region W51 IRS2
Charles M. Telesco, Han Zhang, Frank Varosi +4
We present 0.4 arcsec-resolution imaging polarimetry at 8.7, 10.3, and 12.5 microns, obtained with CanariCam at the Gran Telescopio Canarias, of the central region of W51 IRS2. The…
Mid-Infrared Drift Scanning Up The SNR Slope
Christopher Packham, AmÃlcar R. Torres-Quijano, Sergio Fernandez Acosta
Mid-infrared (MIR) observations are typically accomplished from the ground through oscillating the secondary mirror a few times a second. This chopping serves to remove the fast ti…
High-spatial-resolution imaging of thermal emission from debris disks
Margaret Moerchen, Charles Telesco, Christopher Packham
We have obtained sub-arcsec mid-IR images of a sample of debris disks within 100 pc. For our sample of nineteen A-type debris disk candidates chosen for their IR excess, we have re…
Gemini Imaging of Mid-IR Emission from the Nuclear Region of Centaurus A
James T. Radomski, Christopher Packham, N. A. Levenson +7
We present high spatial resolution mid-IR images of the nuclear region of NGC 5128 (Centaurus A). Images were obtained at 8.8 micron, N-band (10.4 micron), and 18.3 micron using th…
On the difference of torus geometry between hidden and non-hidden broad line active galactic nuclei
Kohei Ichikawa, Christopher Packham, Cristina Ramos Almeida +13
We present results from the fitting of infrared (IR) spectral energy distributions of 21 active galactic nuclei (AGN) with clumpy torus models. We compiled high spatial resolution…
Mid-IR Spectra of Type Ia SN 2014J in M82 Spanning the First Four Months
Charles M. Telesco, Peter Höflich, Dan Li +12
We present a time series of 8 - 13 m spectra and photometry for SN 2014J obtained 57, 81, 108, and 137 d after the explosion using CanariCam on the Gran Telescopio Canarias. Th…
Impact of AGN and nuclear star formation on the ISM turbulence of galaxies: Insights from JWST/MIRI spectroscopy
Rogemar A. Riffel, Luis Colina, José Henrique Costa-Souza +31
Active galactic nuclei (AGN), star formation (SF), and galaxy interactions can drive turbulence in the gas of the ISM, which in turn plays a role in the SF within galaxies. The imp…
Spitzer Space Telescope Measurements of Dust Reverberation Lags in the Seyfert 1 Galaxy NGC 6418
Billy Vazquez, Pasquale Galianni, Michael Richmond +22
We present results from a fifteen-month campaign of high-cadence (~ 3 days) mid-infrared Spitzer and optical (B and V ) monitoring of the Seyfert 1 galaxy NGC 6418, with the object…
The Vector-APP: a Broadband Apodizing Phase Plate that yields Complementary PSFs
Frans Snik, Gilles Otten, Matthew Kenworthy +4
The apodizing phase plate (APP) is a solid-state pupil optic that clears out a D-shaped area next to the core of the ensuing PSF. To make the APP more efficient for high-contrast i…
Mid-Infrared Imaging of Nearby Radio-Loud AGN
Eric S. Perlman, Matthew Merlo, Christopher Packham +2
We present high spatial resolution MIR observations for several nearby radio loud active galactic nuclei (RLAGN), which were obtained using the Gemini North and South telescopes. O…
Asymmetric Heating of the HR 4796A Dust Ring Due to Pericenter Glow
Margaret Moerchen, Laura Churcher, Charles Telesco +3
We have obtained new resolved images of the well-studied HR 4796A dust ring at 18 and 25 microns with the 8-meter Gemini telescopes. These images confirm the previously observed sp…
Gemini North Adaptive Optics (GNAO) facility overview and status updates
Gaetano Sivo, Julia Scharwächter, Manuel Lazo +54
The Gemini North Adaptive Optics (GNAO) facility is the upcoming AO facility for Gemini North providing a state-of-the-art AO system for surveys and time domain science in the era…
Mid-Infrared Polarization of the Diffuse Interstellar Medium toward CygOB2-12
Charles M. Telesco, Frank Varosi, Christopher Wright +3
We present the first mid-IR detection of the linear polarization toward the star CygOB2-12, a luminous blue hypergiant that, with Av of ~10 mag of foreground extinction, is a bench…
CanariCam Mid-Infrared Drift Scanning: Improved Sensitivity and Spatial Resolution
AmÃlcar R. Torres-Quijano, Christopher Packham, Sergio Fernandez Acosta
Ground-based mid-infrared (MIR) astronomical observations require the removal of the fast time variable components of (a) sky/background variation and (b) array background. Typical…
Jet-driven shocks and turbulence in radio-loud Active Galactic Nuclei observed with JWST MIRI/MRS
Rogemar A. Riffel, Gabriel L. Souza-Oliveira, Luis Colina +34
Jet-cloud interactions are a key manifestation of Active Galactic Nucleus (AGN) feedback on nuclear scales, distinct from the large-scale radio-mode feedback that suppresses gas co…
12 and 18 micron images of dust surrounding HD 32297
Margaret M. Moerchen, Charles M. Telesco, James M. De Buizer +2
We present the first subarcsecond-resolution images at multiple mid-IR wavelengths of the thermally-emitting dust around the A0 star HD 32297. Our observations with T-ReCS at Gemin…
Resolved Mid-IR Emission in the Narrow Line Region of NGC 4151
James T. Radomski, Robert K. Pina, Christopher Packham +4
We present subarcsecond resolution mid infrared images of NGC 4151 at 10.8 micron and 18.2 micron. These images were taken with the University of Florida mid-IR camera/spectrometer…
High-Resolution Mid-Infrared Morphology of Cygnus A
James T. Radomski, Robert K. Pina, Christopher Packham +2
We present subarcsecond resolution mid-infrared images at 10.8 and 18.2 microns of Cygnus A. These images were obtained with the University of Florida mid-IR camera/spectrometer OS…
Understanding the 8 micron vs. Pa-alpha relationship on sub-arcsecond scales in Luminous Infrared Galaxies
Tanio Diaz-Santos, Almudena Alonso-Herrero, Luis Colina +3
This work explores in detail the relation between the 8 micron and the Pa-alpha emissions for 122 HII regions identified in a sample of 10 low-z LIRGs with nearly constant metallic…
The Mid-Infrared Polarization of the Herbig Ae Star WL 16: An Interstellar Origin?
Han Zhang, Charles M. Telesco, Eric Pantin +6
We present high-resolution (0".4) mid-infrared (mid-IR) polarimetric images and spectra of WL 16, a Herbig Ae star at a distance of 125 pc. WL 16 is surrounded by a protoplanetary…
Torus and AGN properties of nearby Seyfert galaxies: Results from fitting IR spectral energy distributions and spectroscopy
Almudena Alonso-Herrero, Cristina Ramos Almeida, Rachel Mason +9
We used the CLUMPY torus models and a Bayesian approach to fit the infrared spectral energy distributions (SEDs) and ground-based high-angular resolution mid-infrared spectroscopy…
GTC/CanariCam deep mid-infrared imaging survey of northern stars within 5 pc
Bartosz Gauza, VÃctor J. S. Béjar, Rafael Rebolo +7
In this work we present the results of a direct imaging survey for brown dwarf companions around the nearest stars at the mid-infrared 10 micron range (=8.7m, =1.…
Subaru Spectroscopy and Spectral Modeling of Cygnus A
Matthew J. Merlo, Eric S. Perlman, Robert Nikutta +6
We present high angular resolution (0.5) MIR spectra of the powerful radio galaxy, Cygnus A, obtained with the Subaru telescope. The overall shape of the sp…