astronomy

PKS 0137+012

PKS 0137+012 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 0137+012 rather than just read about it. In short: PKS 0137+012 also known as PHL 1093, is a radio-loud quasar located in the constellation Cetus. The quasar has a redshift of (z) 0.261, meaning it is estimated to be located 3.14 billion light-years away and was first discovered as a discrete source by astronomers in 1968.

Key takeaways

PKS 0137+012 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 0137+012 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PKS 0137+012 from memory before moving on to harder problems.

Reference excerpt

PKS 0137+012 also known as PHL 1093, is a radio-loud quasar located in the constellation Cetus. The quasar has a redshift of (z) 0.261, meaning it is estimated to be located 3.14 billion light-years away and was first discovered as a discrete source by astronomers in 1968.

Description PKS 0137+012 is hosted by a large elliptical galaxy, specifically an early-type galaxy based on a two-dimensional modelling technique. It is known to have a close companion located 1.0 arcseconds away suggestive of a close interaction. The estimated stellar population age for this galaxy suggests that it is 1.7 billion years old, and has a supermassive black hole with a mass of 2.2 × 109 M☉. A bright knot feature is seen west of its nucleus. The radio source of PKS 0137+012 is compact. Observations of it made in 1978 have shown this source to contain a flat-spectrum radio component at the quasar's position with a steep-spectrum component located at the ending point of an optical jet, making this similar to the radio source structure of 3C 273. A radio map made by the Very Large Array also showed it has a complex radio lobe featuring a curved structure on its north-eastern side caused by precession of its jet. Three other components were discovered with one of them being described as the strongest. It has a flux density of 0.801 ± 0.008 at 1125 MHz.

References

Illustrations

Worked examples

Example 1 — a first encounter with PKS 0137+012

Start with the simplest possible case. Write down what PKS 0137+012 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 0137+012 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 0137+012 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 0137+012

In research: PKS 0137+012 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 0137+012 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 0137+012 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4C objects, Active galaxies, Cetus (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for PKS 0137+012 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 0137+012 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PKS 0137+012 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 0137+012 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PKS 0137+012 in simple terms?

Why does PKS 0137+012 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 0137+012?

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 0137+012.