astronomy

IC 711

IC 711 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 IC 711 rather than just read about it. In short: IC 711 is an elliptical galaxy located in the constellation of Ursa Major. The redshift of the galaxy is (z) 0.031 and it was first discovered by an American astronomer named Lewis Swift on May 11, 1890, who described it as ordinary elliptical when viewed in visible light.

Key takeaways

IC 711 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IC 711 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IC 711 from memory before moving on to harder problems.

Reference excerpt

IC 711 is an elliptical galaxy located in the constellation of Ursa Major. The redshift of the galaxy is (z) 0.031 and it was first discovered by an American astronomer named Lewis Swift on May 11, 1890, who described it as ordinary elliptical when viewed in visible light. It is also a member of the galaxy cluster, Abell 1314, which also includes the galaxies; IC 708, IC 709 and IC 712.

Description IC 711 is categorized as a narrow angle tail (NAT) radio galaxy that hosts a head-tail radio source that is found to be associated with it along with IC 708. When observed in 1987, it is found to display a radio tail structure that extents outwards from its nucleus with a wide distance of around 930 kiloparsecs, thus making this the longest known of this type. There is also a radio head feature that has signs of a major polarization peak; this suggests depolarization. From the head along the tail, the spectra index between 0.6 and 1.4 GHz frequencies, is found to increase although the spectra does remain constant in some areas of the source. Further observations made in 2020, have shown the spectral index for the head feature is mainly flat between the frequencies of 240 and 1300 MHz, with Very Large Array showing the approximate flux density is 25.92 ± 0.03 when observed at 1.5 GHz, 24.30 ± 0.02 at 4.5 GHz and even 23.23 ± 0.01 at around 7.5 GHz. There are also twin-sided jets present in the galaxy, depicted having an asymmetric appearance in the innermost regions. Evidence also found the tail feature is mainly straight, showing at least two bends. The tail spectrum increasing becomes more steep as the distance from the head feature increases until it reaches the end points of the tail.

References

External links IC 711 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 IC 711

Start with the simplest possible case. Write down what IC 711 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 IC 711 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 IC 711 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 IC 711

In research: IC 711 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 IC 711 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: IC 711 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1890, Discoveries by Lewis Swift, so understanding it makes those chapters shorter.
In everyday life: Look for IC 711 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 IC 711 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IC 711 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 IC 711 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IC 711 in simple terms?

Why does IC 711 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 IC 711?

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 IC 711.