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Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes
Published on: December 20, 2014
Subparsec-scale structure and evolution of Centaurus A (NGC5128).
Summary
We monitored Centaurus A's radio jet using very-long-baseline interferometry over 3.3 years. Structural changes and subluminal motion were observed in the jet's 1 parsec length, revealing its complex morphology.
Area of Science:
- Astronomy
- Astrophysics
- Radio Astronomy
Background:
- Centaurus A (NGC5128) is a nearby active galaxy with a prominent radio jet.
- Understanding the dynamics and structure of extragalactic radio jets is crucial for galaxy evolution studies.
Purpose of the Study:
- To monitor the nuclear radio jet of Centaurus A over a 3.3-year period.
- To investigate the jet's morphology, motion, and structural changes at high resolution.
Main Methods:
- Utilized 8.4-GHz very-long-baseline radio interferometry (VLBI) with a Southern Hemisphere array.
- Conducted high-resolution observations at 4.8 and 8.4 GHz in November 1992.
Main Results:
- The nuclear radio jet of Centaurus A spans approximately 1 parsec at its distance.
- Observed subluminal motion and structural changes on timescales shorter than 4 months.
- Identified a complex jet morphology and unambiguously located the self-absorbed core.
Conclusions:
- The study provides detailed insights into the dynamic behavior of Centaurus A's radio jet.
- VLBI observations are effective in resolving fine structures and temporal changes in active galactic nuclei jets.
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