astronomy

PKS 0054+018

PKS 0054+018 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 0054+018 rather than just read about it. In short: PKS 0054+018 also known as RGZ J005727.8+020934, is a radio galaxy located in the constellation of Cetus. The redshift of the galaxy has been estimated as (z) 0.292 and it was first discovered as an astronomical radio source by astronomers in October 1975.

Key takeaways

PKS 0054+018 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 0054+018 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PKS 0054+018 from memory before moving on to harder problems.

Reference excerpt

PKS 0054+018 also known as RGZ J005727.8+020934, is a radio galaxy located in the constellation of Cetus. The redshift of the galaxy has been estimated as (z) 0.292 and it was first discovered as an astronomical radio source by astronomers in October 1975. Subsequently, it was identified with a galaxy counterpart in November 1976.

Description PKS 0054+018 is a Fanaroff-Riley Class Type I radio galaxy residing as the brightest cluster galaxy (BCG) of the galaxy cluster, WHL J005727.9+020935 with 39 confirmed galaxy member candidates. The total r-band magnitude of the galaxy is 17.32 magnitude and its absolute magnitude is -23.67. There is no evidence of an extended emission-line region (EELR). The galaxy contains an extended radio source depicted as a double based on radio imaging made by the Very Large Array (VLA), with the total flux density of 0.550 mJy at 1.5 GHz frequencies and 0.160 at 4.9 GHz frequencies. A total spectral index is calculated to be 0.95α. The total radio luminosity of the source at 1.4 GHz is estimated to be 25.9 W Hz-1 and the largest projected size is 182 kiloparsecs. The radio power is calculated to be 119.18 × 1024 WHz-1 and the flux density is 433.0 mJy at 1.4 GHz, obtained by the NRAO VLA Sky Survey (NVSS). The radio source is bent, with an angle of 14.3°, with an excess bending angle of 8.7°. The source tail is also radically bent in respect to the cluster. The optical spectrum of the galaxy displays strong signatures of emission lines, including hydrogen-beta, magnesium b triplet and calcium monohydride.

References

External links PKS 0054+018 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Illustrations

Worked examples

Example 1 — a first encounter with PKS 0054+018

Start with the simplest possible case. Write down what PKS 0054+018 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 0054+018 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 0054+018 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 0054+018

In research: PKS 0054+018 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 0054+018 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 0054+018 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1975, Cetus (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for PKS 0054+018 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 0054+018 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PKS 0054+018 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 0054+018 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PKS 0054+018 in simple terms?

Why does PKS 0054+018 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 0054+018?

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 0054+018.