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Centaurus A (Cen A) is one of the most famous galaxies hosting an active galactic nucleus (AGN), where the interaction between AGN activities and surrounding interstellar and intergalactic media has been investigated. Recent studies…

Astrophysics of Galaxies · Physics 2020-09-17 R. Katayama , H. Kaneda , T. Kokusho , K. Morihana , T. Suzuki , S. Oyabu , M. Yamagishi , T. Tsuchikawa

Centaurus A (Cen A) is a bright radio source associated with the nearby galaxy NGC 5128 where high-resolution radio observations can probe the jet at scales of less than a light-day. The South Pole Telescope (SPT) and the Atacama Pathfinder…

CONTEXT: Simple geometrical ring models account well for near-infrared interferometric observations of dusty disks surrounding pre-main sequence stars of intermediate mass. Such models demonstrate that the dust distribution in these disks…

Astrophysics · Physics 2009-11-11 Andrea Isella , Leonardo Testi , Antonella Natta

We present the results of a VLBI Space Observatory Programme (VSOP) observation of the subparsec structure in Centaurus A at 4.9 GHz. Owing to its proximity, our Centaurus A space-VLBI image is one of the highest spatial resolution images…

Astrophysics · Physics 2015-06-24 Shinji Horiuchi , David L. Meier , Robert A. Preston , Steven J. Tingay

In a multi-wavelength study of thermal emission and scattered light images we analyse the dust properties and structure of the debris disc around the A1-type main sequence star 49~Cet. As a basis for this study, we present new scattered…

Resolved submillimeter imaging of transitional disks is increasingly revealing the complexity of disk structure. Here we present the first high-resolution submillimeter image of a recently identified transitional disk around IRAS 04125+2902…

Earth and Planetary Astrophysics · Physics 2015-07-15 C. Espaillat , S. Andrews , D. Powell , D. Feldman , C. Qi , D. Wilner , P. D'Alessio

Centaurus A is the most nearby powerful AGN, widely studied at all wavelengths. Molecular gas has been found in the halo at a distance of ~20 kpc from the galaxy centre, associated with HI shells. The molecular gas lies inside some IR and…

Astrophysics of Galaxies · Physics 2016-01-27 Quentin Salomé , Philippe Salomé , Françoise Combes , Stephen Hamer , Ian Heywood

We present the widest-field resolved stellar map to date of the closest ($D\sim3.8$ Mpc) massive elliptical galaxy NGC 5128 (Centaurus A; Cen A), extending out to a projected galactocentric radius of $\sim150$ kpc. The dataset is part of…

Astrophysics of Galaxies · Physics 2016-05-25 D. Crnojević , D. J. Sand , K. Spekkens , N. Caldwell , P. Guhathakurta , B. McLeod , A. Seth , J. Simon , J. Strader , E. Toloba

We present an analysis of the morphology and profiles of the dust continuum emission in 153 bright sub-millimetre galaxies (SMGs) detected with ALMA at S/N ratios of $>8$ in high-resolution $0.18''$ ($\sim1$kpc) 870$\mu$m maps. We measure…

The young star AB Aurigae is surrounded by a complex combination of gas-rich and dust dominated structures. The inner disk which has not been studied previously at sufficient resolution and imaging dynamic range seems to contain very little…

We present new Spitzer IRS spectroscopy of Cygnus A, one of the most luminous radio sources in the local universe. Data on the inner 20" are combined with new reductions of MIPS and IRAC photometry as well as data from the literature to…

Cosmology and Nongalactic Astrophysics · Physics 2012-02-17 G. C. Privon , S. A. Baum , C. P. O'Dea , J. Gallimore , J. Noel-Storr , D. J. Axon , A. Robinson

We present results from a joint ALMA-HST study of the nearby spiral galaxy NGC 628. We combine the HST LEGUS database of over 1000 stellar clusters in NGC 628 with ALMA Cycle 4 millimeter/submillimeter observations of the cold dust…

Astrophysics of Galaxies · Physics 2019-11-06 J. A. Turner , D. A. Dale , A. Adamo , D. Calzetti , K. Grasha , E. K. Grebel , K. E. Johnson , J. C. Lee , L. J. Smith , I. Yoon

The Submillimeter Array has opened a new window to study the innermost warm and dense regions of the envelopes and disks around deeply embedded protostars. This paper presents high-angular resolution (< 2'') submillimeter observations of…

We use the radiation transfer simulation of Xilouris et al. (1999) to constrain the quantity of dust in three nearby spiral galaxies (NGC 4013, NGC 5907 and NGC 891). The predicted visual optical depth from the model is compared with the…

Astrophysics · Physics 2009-11-10 E. M. Xilouris

We present subarcsecond observations at 2.7 and 1.4 mm of a sample of massive young stellar objects made with the BIMA millimetre array. For most sources the continuum emission on the smallest scales at 2.7 mm is dominated by free-free…

Astrophysics · Physics 2007-05-23 Andy Gibb , Melvin Hoare , Lee Mundy , Friedrich Wyrowski

We report HST NICMOS observations of the central region of NGC 5128 at 2.2mic and in Paschen Alpha (PA). The continuum images show extended emission typical of an elliptical galaxy and a strong unresolved central source we identify as the…

Spitzer Space Telescope mid-infrared images of the radio galaxy Centaurus A reveal a shell-like, bipolar, structure 500 pc to the north and south of the nucleus. This shell is seen in 5.8, 8.0 and 24 micron broad-band images. Such a…

We present resolved images of the dust continuum emission from the debris disk around the young (80-200 Myr) solar-type star HD 107146 with CARMA at $\lambda$1.3 mm and the CSO at $\lambda$350 $\mu$m. Both images show that the dust emission…

We present observations of the spiral galaxy NGC 7331 using the Sub-millimetre Common User Bolometer Array (SCUBA) on the James Clark Maxwell Telescope. We have detected a dust ring of 45 arcsec radius (3.3 kpc) at wavelengths of 450 and…

Astrophysics · Physics 2009-10-30 S. Bianchi , P. B. Alton , J. I. Davies , M. Trewhella

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 Gemini South reveal a nearly edge-on resolved disk at both 11.7…