VLA H I observations of the radio galaxy Centaurus A

1990 ◽  
Vol 99 ◽  
pp. 1781 ◽  
Author(s):  
J. H. van Gorkom ◽  
J. M. van der Hulst ◽  
A. D. Haschick ◽  
A. D. Tubbs
Keyword(s):  
Radio Galaxy ◽  
Centaurus A

scholarly journals A Counterjet in the Nucleus of Centaurus A

1996 ◽  
Vol 175 ◽  
pp. 23-24
Author(s):  
D.L. Jones ◽  
S.J. Tingay ◽  
R.A. Preston ◽  
D.L. Jauncey ◽  
J.E. Reynolds ◽  
...  
Keyword(s):  
Radio Source ◽  
Radio Galaxy ◽  
Dense Plasma ◽  
Jet Formation ◽  
Radio Jets ◽  
Compact Radio Source ◽  
Centaurus A

Centaurus A (NGC 5128) is the nearest giant radio galaxy. It is a Fanaroff-Riley type 1 (low luminosity) radio source, but the compact radio source in the nucleus is strong enough that VLBI imaging has been possible with both the SHEVE array and the VLBA at several frequencies. These observations have detected a sub-parsec scale counterjet. This shows that jet formation in at least some FR I sources is intrinsically two-sided over very small distances and the radio jets in Centaurus A are probably only moderately relativistic. We also find evidence that the center of activity in Centaurus A is partially obscured by a disk or torus of dense plasma.

scholarly journals GIANT LOBES OF CENTAURUS A RADIO GALAXY OBSERVED WITH THESUZAKUX-RAY SATELLITE

2013 ◽  
Vol 766 (1) ◽  
pp. 48 ◽  
Author(s):  
Ł. Stawarz ◽  
Y. T. Tanaka ◽  
G. Madejski ◽  
S. P. O’Sullivan ◽  
C. C. Cheung ◽  
...  
Keyword(s):  
Radio Galaxy ◽  
Centaurus A

scholarly journals SUZAKUVIEW OF X-RAY SPECTRAL VARIABILITY OF THE RADIO GALAXY CENTAURUS A: PARTIAL COVERING ABSORBER, REFLECTOR, AND POSSIBLE JET COMPONENT

2011 ◽  
Vol 743 (2) ◽  
pp. 124 ◽  
Author(s):  
Yasushi Fukazawa ◽  
Kazuyoshi Hiragi ◽  
Syoko Yamazaki ◽  
Motohiro Mizuno ◽  
Kazuma Hayashi ◽  
...  
Keyword(s):  
Radio Galaxy ◽  
Spectral Variability ◽  
X Ray ◽  
Partial Covering ◽  
Centaurus A

Detection of C3H2 emission in the radio galaxy centaurus A (= NGC 5128)

1988 ◽  
Vol 329 ◽  
pp. L17 ◽  
Author(s):  
M. B. Bell ◽  
E. R. Seaquist
Keyword(s):  
Radio Galaxy ◽  
Centaurus A

scholarly journals An ALMA and ATCA Molecular Line Survey Toward Centaurus A

2012 ◽  
Vol 8 (S292) ◽  
pp. 251-251
Author(s):  
Jürgen Ott ◽  
Mark McCoy ◽  
David Meier
Keyword(s):  
Radio Galaxy ◽  
Molecular Absorption ◽  
Physical Processes ◽  
Molecular Line ◽  
Physical Conditions ◽  
Line Survey ◽  
Molecular Abundances ◽  
Excitation Conditions ◽  
Compact Array ◽  
Centaurus A

AbstractWe present Atacama Large Millimeter/submillimeter Array (ALMA) and Australia Telescope Compact Array (ATCA) data of molecular absorption lines toward the bright central core of the prominent, nearby (d ∼ 3.8 Mpc) radio galaxy Centaurus A, at 13, 7, 3, and 1mm wavelengths. The line of sight crosses the prominent dust lane and continues through the disk and eventually through gas that may be very close to the central supermassive black hole. The goal of our survey is to determine the physical conditions of the gas via analyses of molecular line tracers including molecular abundances and excitation conditions that are sensitive to changes in temperature, density, ionization, and shocks. This study allows us to derive the physical processes that are shaping each molecular environment.

scholarly journals FERMI LAT OBSERVATION OF CENTAURUS A RADIO GALAXY

2013 ◽  
Vol 23 ◽  
pp. 27-33
Author(s):  
N. V. SAHAKYAN
Keyword(s):  
Gamma Ray ◽  
Radio Galaxy ◽  
Spectral Energy Distribution ◽  
Spectral Energy ◽  
Large Area ◽  
Radio Image ◽  
Likelihood Analysis ◽  
Low Energies ◽  
Photon Index ◽  
Centaurus A

The results of analysis of approximately 3 year gamma-ray observations (August 2008–July 2011) of the core of radio galaxy Centaurus A with the Fermi Large Area Telescope (Fermi LAT) are presented. Binned likelihood analysis method applying to the data shows that below several GeV the spectrum can be described by a single power-law with photon index Γ = 2.73 ± 0.06. However, at higher energies the new data show significant excess above the extrapolation of the energy spectrum from low energies. The comparison of the corresponding Spectral Energy Distribution (SED) at GeV energies with the SED in the TeV energy band reported by the H.E.S.S. collaboration shows that we deal with two or perhaps even three components of gamma-radiation originating from different regions located within the central 10 kpc of Centaurus A. The analysis of gamma-ray data of Centaurus A lobe accumulated from the beginning of the operation until November 14, 2011 show extension of the HE gamma-ray emission beyond the WMAP radio image in the case of the Northern lobe [9]. The possible origins of gamma-rays from giant radio lobes of Centaurus A are discussed in the context of hadronic and leptonic scenarios.

scholarly journals Emission Regions in Centaurus A

1982 ◽  
Vol 97 ◽  
pp. 115-116
Author(s):  
R. M. Price ◽  
J. A. Graham
Keyword(s):  
Radio Source ◽  
Faraday Rotation ◽  
Linear Polarization ◽  
Radio Galaxy ◽  
Radio Galaxies ◽  
Extragalactic Radio Source ◽  
Physical Mechanisms ◽  
Centaurus A

Centaurus A, at an estimated distance of five megaparsecs, is the closest radio galaxy. It presents the best opportunity to examine in detail the physical mechanisms and resulting structures that are to be found in radio galaxies. Centaurus was first studied in detail at radio wavelengths by Cooper, Price and Cole (1965), hence CPC. Many of the comments, interpretations, and conclusions recorded in that paper remain valid today and provide the broader framework in which the more detailed studies using today's more powerful instrumentation can be understood. Historically, it is also interesting to note that Centaurus A was the first extragalactic radio source in which linear polarization and Faraday rotation were discovered and extensively studied.

The Subparsec-Scale Structure and Evolution of Centaurus A: The Nearest Active Radio Galaxy

1998 ◽  
Vol 115 (3) ◽  
pp. 960-974 ◽  
Author(s):  
S. J. Tingay ◽  
D. L. Jauncey ◽  
J. E. Reynolds ◽  
A. K. Tzioumis ◽  
E. A. King ◽  
...  
Keyword(s):  
Radio Galaxy ◽  
Scale Structure ◽  
Centaurus A
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