astronomy

PKS 2134+004

PKS 2134+004 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 2134+004 rather than just read about it. In short: PKS 2134+004 is a distant radio-loud quasar located in the constellation of Aquarius with an approximate magnitude of 18. Its redshift is (z) 1.944 and it is classified as a compact source.

Key takeaways

PKS 2134+004 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 2134+004 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PKS 2134+004 from memory before moving on to harder problems.

Reference excerpt

PKS 2134+004 is a distant radio-loud quasar located in the constellation of Aquarius with an approximate magnitude of 18. Its redshift is (z) 1.944 and it is classified as a compact source. It was discovered in a survey by A.J. Shimmins in 1968. This object contains a radio spectrum appearing as flat, making it a flat-spectrum radio quasar. The spectrum of the source shows an absorption feature.

Description PKS 2134+004 is described as a high frequency peaker (HFP) with a core-jet morphology. It consists of a radio core located in the easternmost region and a jet that is pointing north with a bending angle towards the west, when imaged by the Very Long Baseline Array (VLBA). Based on polarimetric observations by VLBA, the core is found brighter and stronger at 15 GHz with a flat spectral index approximately measured as 0.0 ± 0.1. The core also has a polarization level of 0.5% and a Faraday rotation of 1100 rad m−2. Very Long Baseline Interferometry (VLBI) showed PKS 2134+004 has three components; mainly a compact strong core and two other components having an approximate separation of both 4.0 milliarcseconds at position angle of -152° and 2.5 milliarcseconds at position angle of -122°. Radio emission can be seen surrounding the core on arcsecond scales with a faint bridge reaching the western component. PKS 2134+004 displays small variations, usually occurring on time-scales of several years. The radio spectrum of the source is peaked, with its flux density reaching around 8 Jy at 5 GHz frequencies. Light curves of the object showed it be to extremely variable at optical wavelengths and on a millimetre radio light curve, exhibiting two bright radio outbursts that were detected in 1937 and 1949, with its B magnitude reaching a maximum of 14.8. Increased gamma ray activity was detected by the Large Area Telescope (LAT) in December 2018. The host of PKS 2134+004 is a massive, luminous elliptical galaxy. Based on studies, it has a color index that is found redder by 0.5 magnitude compared to its nucleus.

References

External links PKS 2134+004 on NASA/IPAC Database PKS 2134+004 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with PKS 2134+004

Start with the simplest possible case. Write down what PKS 2134+004 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 2134+004 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 2134+004 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 2134+004

In research: PKS 2134+004 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 2134+004 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 2134+004 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Aquarius (constellation), Astronomical objects discovered in 1968, so understanding it makes those chapters shorter.
In everyday life: Look for PKS 2134+004 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 2134+004 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PKS 2134+004 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 2134+004 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PKS 2134+004 in simple terms?

PKS 2134+004 is a distant radio-loud quasar located in the constellation of Aquarius with an approximate magnitude of 18. Its redshift is (z) 1.944 and it is classified as a compact source.

Why does PKS 2134+004 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 2134+004?

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 2134+004.