astronomy

PKS 1932−46

PKS 1932−46 is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand PKS 1932−46 rather than just read about it. In short: PKS 1932−46 is a broad-line radio galaxy located in the constellation of Telescopium. The redshift of the galaxy is (z) 0.230 and it was first identified as an astronomical radio source in the Parkes Catalogue survey in 1970.

Key takeaways

PKS 1932−46 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PKS 1932−46 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PKS 1932−46 from memory before moving on to harder problems.

Reference excerpt

PKS 1932−46 is a broad-line radio galaxy located in the constellation of Telescopium. The redshift of the galaxy is (z) 0.230 and it was first identified as an astronomical radio source in the Parkes Catalogue survey in 1970.

Description PKS 1932−46 has strong detections of emission lines towards the eastern direction from its nucleus. The host galaxy is a large elliptical galaxy with a Fanaroff-Riley Class Type 2 radio morphology and has a total radio power of 5.5 × 1026 W Hz−1. It has a mainly old stellar population around 12 billion years old, although a very young stellar population is suggested. A disturbed companion with a double nucleus is found north-east from the host galaxy, confirming they are gravitationally interacting. Further evidence of the interaction is two tidal tails extending in both directions from the galaxies. The nucleus of PKS 1932−46 has irregular structures surrounding it, based on r-band imaging. The radio source of the galaxy has been classified as a double, containing two asymmetrical radio lobes with bright hot spot features. Both lobes are located 54 and 35 kiloparsecs away from the nucleus. The lobe of the western side has strong polarization signs compared to the lobe on the eastern side. A small rotation measure is found on the western lobe with a range between -14 and 35 rad m−2. The galaxy has an extended emission line region (EELR). When observed, the region is found to be mainly complex. The center of the region close to the active galactic nucleus displays several velocity structures with detections of broad line widths reaching up to 1000 kilometer per seconds. However, the outer regions of the EELR lacks disturbed kinematics. Further evidence also showed the EELR is also reaching the outer boundaries of the western lobe. This EELR has also been suggested to be classified as star-forming halo feature likely triggered by tidal debris from the companion, with the gas showing an irregular morphology that is described as knotty and with a total extent of 160 kiloparsecs.

References

External links PKS 1932−46 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images PKS 1932–46

Illustrations

Worked examples

Example 1 — a first encounter with PKS 1932−46

Start with the simplest possible case. Write down what PKS 1932−46 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to PKS 1932−46 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about PKS 1932−46 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of PKS 1932−46

In research: PKS 1932−46 appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses PKS 1932−46 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: PKS 1932−46 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1970, Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for PKS 1932−46 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study PKS 1932−46 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PKS 1932−46 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain PKS 1932−46 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PKS 1932−46 in simple terms?

Why does PKS 1932−46 matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study PKS 1932−46?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on PKS 1932−46.