astronomy

SDSS J081641.02+092332.5

SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5 rather than just read about it. In short: SDSS J081641.02+092332.5 also known as [YHW2016] J124.17091+09.39236, is a radio galaxy located in the constellation of Cancer. The redshift of the galaxy is found to be (z) 0.255.

Key takeaways

SDSS J081641.02+092332.5 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SDSS J081641.02+092332.5 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J081641.02+092332.5 from memory before moving on to harder problems.

Reference excerpt

SDSS J081641.02+092332.5 also known as [YHW2016] J124.17091+09.39236, is a radio galaxy located in the constellation of Cancer. The redshift of the galaxy is found to be (z) 0.255.

Description SDSS J081641.02+092332.5 is an elliptical galaxy residing as the brightest cluster galaxy of the WHL J081641.0+092332 galaxy cluster with 47 confirmed galaxy members. The R-band magnitude of the galaxy has been calculated to be 16.06 magnitude while its absolute magnitude is -24.63. The nucleus is active and it has been categorized as a non-bent Fanaroff-Riley Class Type I radio galaxy with its total flux density of 19.80 mJy by NRAO VLA Sky Survey (NVSS). The radio morphology of the source is elongated, mainly described as a single elliptical profile component. There is a presence of a detected radio core with its total core flux density calculated to be 17.42 mJy and has a total radio emission flux density of 19.60 mJy. The total radio power of the source is found to be 3.94 × 1024 WHz−1. A study found the total stellar mass of the galaxy is 11.59 M☉. The log radio luminosity is found to be 24.58 W Hz−1 whereas the total flux density at 1.4 GHz is 19.8 mJy. The rest frame r0.1 magnitude is estimated to be -23.42. Evidence found the source is mainly powered by its own AGN (active galactic nucleus).

References

External links SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5

Start with the simplest possible case. Write down what SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5

In research: SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5 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: SDSS J081641.02+092332.5 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Cancer (constellation), Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J081641.02+092332.5 in simple terms?

SDSS J081641.02+092332.5 also known as [YHW2016] J124.17091+09.39236, is a radio galaxy located in the constellation of Cancer. The redshift of the galaxy is found to be (z) 0.255.

Why does SDSS J081641.02+092332.5 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 SDSS J081641.02+092332.5?

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 SDSS J081641.02+092332.5.