astronomy

OH 471

OH 471 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 OH 471 rather than just read about it. In short: OH 471 (OHIO H 471) is a distant powerful quasar located in the northern constellation of Auriga. First discovered in 1974 from a photoelectric spectrophotometry, the object has a redshift of (z) 3.40.

Key takeaways

OH 471 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect OH 471 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of OH 471 from memory before moving on to harder problems.

Reference excerpt

OH 471 (OHIO H 471) is a distant powerful quasar located in the northern constellation of Auriga. First discovered in 1974 from a photoelectric spectrophotometry, the object has a redshift of (z) 3.40. This high redshift makes it one of the most distant objects observed, giving it a nickname of "the blaze marking the edge of the universe." It is found to be significantly variable thus classifying it as a blazar.

Description OH 471 is a low polarized quasar but also a high frequency peaker (HFP). It is a radio-loud gamma ray blazar with a central supermassive black hole mass of 9.1 M☉ and a luminosity of 6.8 × 1028 W Hz−1. In its spectrum, it shows an inverted and steep spectra, reaching a peak at 18.6 GHz. In additional, OH 471 also displayed two major flares, visible at higher frequencies of 15 and 8 GHz, in March 2003 and October 2008. Reduced activity was observed in the object with its flux density decreasing following 2009. During 1985 to 1996, the object exhibited an increase in its radio flux with its factor showing a slight increase by 1.6. Observations by Very Long Baseline Interferometry found the object has a core-jet morphology. Based on radio images, the source is compact. Its non-linear structure described as a jet, is found to be extended by 8 milliarcseconds to the east direction. The jet also appears as twisted with a bending angle of 50°. Superluminal motion was also implied as the inner jet component displayed an estimated core separation of 0.76 ± 0.11c. A nuclear region was detected, containing most of the flux density. There is a resolved radio core extending along a position angle of 81°, which is further broken up into two individual circular nuclear components with a separation of 0.76 mas. A fainter component can be seen west from the core. Digicon and image-tube spectroscopy of the spectrum of OH 471, found there are 89 absorption lines. Four absorption-line redshift systems are identified. Based on results, they are located at redshifts (z) 3.122, 3.191, 3.246 and 3.343.

References

External links OH 471 on SIMBAD OH 471 on NASA/IPAC Database

Illustrations

Worked examples

Example 1 — a first encounter with OH 471

Start with the simplest possible case. Write down what OH 471 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 OH 471 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 OH 471 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 OH 471

In research: OH 471 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 OH 471 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: OH 471 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1974, Auriga, so understanding it makes those chapters shorter.
In everyday life: Look for OH 471 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 OH 471 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what OH 471 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 OH 471 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is OH 471 in simple terms?

Why does OH 471 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 OH 471?

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 OH 471.