astronomy

WN B1851+5707

WN B1851+5707 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 WN B1851+5707 rather than just read about it. In short: WN B1851+5707 also known as WN B1851+5707a, is a radio galaxy located in the constellation of Draco. The redshift of the object is (z) 0.107 and it was first discovered by astronomers in November 1998 from the WENSS survey where they classified it as an elliptical galaxy without the presence of any emission lines in its optical spectrum.

Key takeaways

WN B1851+5707 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WN B1851+5707 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WN B1851+5707 from memory before moving on to harder problems.

Reference excerpt

WN B1851+5707 also known as WN B1851+5707a, is a radio galaxy located in the constellation of Draco. The redshift of the object is (z) 0.107 and it was first discovered by astronomers in November 1998 from the WENSS survey where they classified it as an elliptical galaxy without the presence of any emission lines in its optical spectrum.

Description WN B1851+5707 is categorized as a dying radio galaxy located at the center of a cool core galaxy cluster, RX J1852.1+5711. Radio imaging made with the Very Large Array (VLA) found it is actually made up of two separate radio sources called WN B1851+5707a and WN B1851+5707b, associated with this object and another dying radio galaxy. The main source (WN B1851+5707a) has an ultra steep radio spectrum with a compact and luminous appearance. The spectral index of the source is found to be 1.7α and the total flux density is 53.3 mJy at 1.4 GHz frequencies. A total radio power at 151 MHz is calculated as 1025.3 W Hz-1. There is a point-like source positioned in the center of the galaxy with radio flux originating from within an extended structure, making it a de-energized source. It has a shapeless appearance and is asymmetric. The total linear size is estimated to be 30 × 15 kiloparsecs. There are no signs of any radio jets categorized as active. A study published in 2011, has found the radio lobes ejected from the galaxy have a total radio luminosity of 1.8 × 1025 W/Hz and a spectra index of 0.7α. No evidence of X-ray cavities were associated with the lobes.

References

External links WN B1851+5707 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 WN B1851+5707

Start with the simplest possible case. Write down what WN B1851+5707 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 WN B1851+5707 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 WN B1851+5707 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 WN B1851+5707

In research: WN B1851+5707 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 WN B1851+5707 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: WN B1851+5707 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1998, Draco (constellation), Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for WN B1851+5707 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 WN B1851+5707 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WN B1851+5707 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 WN B1851+5707 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WN B1851+5707 in simple terms?

Why does WN B1851+5707 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 WN B1851+5707?

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 WN B1851+5707.