Radio‐Optical Alignment and Recent Star Formation Associated with Ionized Filaments in the Halo of NGC 5128 (Centaurus A)

2002 ◽  
Vol 564 (2) ◽  
pp. 688-695 ◽  
Author(s):  
M. Rejkuba ◽  
D. Minniti ◽  
F. Courbin ◽  
D. R. Silva
Keyword(s):  
Star Formation ◽  
Optical Alignment ◽  
Centaurus A

scholarly journals Star formation efficiency along the radio jet in Centaurus A

2016 ◽  
Vol 586 ◽  
pp. A45 ◽  
Author(s):  
Q. Salomé ◽  
P. Salomé ◽  
F. Combes ◽  
S. Hamer ◽  
I. Heywood
Keyword(s):  
Star Formation ◽  
Formation Efficiency ◽  
Centaurus A

scholarly journals Embedded star formation in the extended narrow line region of Centaurus A: Extreme mixing observed by MUSE

2016 ◽  
Vol 590 ◽  
pp. A37 ◽  
Author(s):  
F. Santoro ◽  
J. B. R. Oonk ◽  
R. Morganti ◽  
T. A. Oosterloo ◽  
C. Tadhunter
Keyword(s):  
Star Formation ◽  
Narrow Line ◽  
Line Region ◽  
Narrow Line Region ◽  
Centaurus A

scholarly journals STAR FORMATION IN DWARF GALAXIES OF THE NEARBY CENTAURUS A GROUP

2009 ◽  
Vol 138 (4) ◽  
pp. 1037-1061 ◽  
Author(s):  
Stéphanie Côté ◽  
Adam Draginda ◽  
Evan D. Skillman ◽  
Bryan W. Miller
Keyword(s):  
Star Formation ◽  
Dwarf Galaxies ◽  
Centaurus A

scholarly journals Numerical Simulation of Star Formation by the Bow Shock of the Centaurus A Jet

2017 ◽  
Vol 835 (2) ◽  
pp. 232 ◽  
Author(s):  
Carl L. Gardner ◽  
Jeremiah R. Jones ◽  
Evan Scannapieco ◽  
Rogier A. Windhorst
Keyword(s):  
Numerical Simulation ◽  
Star Formation ◽  
Bow Shock ◽  
Centaurus A

scholarly journals Hydrogen recombination near-infrared line mapping of Centaurus A with IRSF/SIRIUS

2020 ◽  
Vol 72 (5) ◽  
Author(s):  
Risako Katayama ◽  
Hidehiro Kaneda ◽  
Takuma Kokusho ◽  
Kumiko Morihana ◽  
Toyoaki Suzuki ◽  
...  
Keyword(s):  
Star Formation ◽  
Near Infrared ◽  
Galactic Halo ◽  
Dust Size Distribution ◽  
Upper Limit ◽  
Narrow Band Filter ◽  
Hα Emission ◽  
Southwest Region ◽  
H Ii Region ◽  
Centaurus A

Abstract 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 reported detections of Hα emission from clouds in the galactic halo toward the northeast and southwest of the nucleus of Cen A, suggesting that AGN jets may have triggered star formation there. We performed near-infrared line mapping of Cen A with the IRSF 1.4 m telescope, using the narrow-band filter tuned for Paβ, from which we find that Paβ emission is not detected significantly from either of the northeast or southwest regions. The upper limit of the Paβ/Hα ratio in the northeast region is compatible with that expected for a typical H ii region, in line with the scenario that AGNs have triggered star formation there. On the other hand, the upper limit of Paβ/Hα in the southwest region is significantly lower than that expected for a typical H ii region. A possible explanation of the low Paβ/Hα ratio in the southwest region is the scattering of Hα and Paβ photons from the center of Cen A by dust grains in the halo clouds. From the upper limit of Paβ/Hα in the southwest region, we obtain constraints on the dust size distribution, which is found to be compatible with those seen in the interstellar medium of our Galaxy.

scholarly journals Star Formation Efficiencies at Giant Molecular Cloud Scales in the Molecular Disk of the Elliptical Galaxy NGC 5128 (Centaurus A)

2019 ◽  
Vol 887 (1) ◽  
pp. 88 ◽  
Author(s):  
D. Espada ◽  
S. Verley ◽  
R. E. Miura ◽  
F. P. Israel ◽  
C. Henkel ◽  
...  
Keyword(s):  
Star Formation ◽  
Molecular Cloud ◽  
Elliptical Galaxy ◽  
Giant Molecular Cloud ◽  
Centaurus A

scholarly journals Inefficient jet-induced star formation in Centaurus A

2017 ◽  
Vol 608 ◽  
pp. A98 ◽  
Author(s):  
Q. Salomé ◽  
P. Salomé ◽  
M.-A. Miville-Deschênes ◽  
F. Combes ◽  
S. Hamer
Keyword(s):  
Star Formation ◽  
Positive Feedback ◽  
Molecular Clouds ◽  
Milky Way ◽  
Data Cube ◽  
Molecular Gas ◽  
Star Forming ◽  
Star Forming Regions ◽  
Co Emission ◽  
Centaurus A

NGC 5128 (Centaurus A) is one of the best targets to study AGN feedback in the local Universe. At 13.5 kpc from the galaxy, optical filaments with recent star formation lie along the radio jet direction. This region is a testbed for positive feedback, here through jet-induced star formation. Atacama Pathfinder EXperiment (APEX) observations have revealed strong CO emission in star-forming regions and in regions with no detected tracers of star formation activity. In cases where star formation is observed, this activity appears to be inefficient compared to the Kennicutt-Schmidt relation. We used the Atacama Large Millimeter/submillimeter Array (ALMA) to map the 12CO(1–0) emission all along the filaments of NGC 5128 at a resolution of 1.3′′ ~ 23.8pc. We find that the CO emission is clumpy and is distributed in two main structures: (i) the Horseshoe complex, located outside the HI cloud, where gas is mostly excited by shocks and where no star formation is observed, and (ii) the Vertical filament, located at the edge of the HI shell, which is a region of moderate star formation. We identified 140 molecular clouds using a clustering method applied to the CO data cube. A statistical study reveals that these clouds have very similar physical properties, such as size, velocity dispersion, and mass, as in the inner Milky Way. However, the range of radius available with the present ALMA observations does not enable us to investigate whether or not the clouds follow the Larson relation. The large virial parameter αvir of the clouds suggests that gravity is not dominant and clouds are not gravitationally unstable. Finally, the total energy injection in the northern filaments of Centaurus A is of the same order as in the inner part of the Milky Way. The strong CO emission detected in the northern filaments is an indication that the energy injected by the jet acts positively in the formation of dense molecular gas. The relatively high virial parameter of the molecular clouds suggests that the injected kinetic energy is too strong for star formation to be efficient. This is particularly the case in the horseshoe complex, where the virial parameter is the largest and where strong CO is detected with no associated star formation. This is the first evidence of AGN positive feedback in the sense of forming molecular gas through shocks, associated with low star formation efficiency due to turbulence injection by the interaction with the radio jet.

scholarly journals Star formation history and evolution of gas-rich dwarf galaxies in the Centaurus A group

2007 ◽  
Vol 374 (1) ◽  
pp. 107-130 ◽  
Author(s):  
M. Grossi ◽  
M. J. Disney ◽  
B. J. Pritzl ◽  
P. M. Knezek ◽  
J. S. Gallagher ◽  
...  
Keyword(s):  
Star Formation ◽  
Dwarf Galaxies ◽  
Star Formation History ◽  
Formation History ◽  
Centaurus A

scholarly journals Inefficient jet-induced star formation in Centaurus A

2018 ◽  
Vol 617 ◽  
pp. C3
Author(s):  
Q. Salomé ◽  
P. Salomé ◽  
M.-A. Miville-Deschênes ◽  
F. Combes ◽  
S. Hamer
Keyword(s):  
Star Formation ◽  
Centaurus A
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