science

J1144−4308

J1144−4308 is a science 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 J1144−4308 rather than just read about it. In short: SMSS J114447.77−430859.3 or J1144 or J1144−4308 is a very bright (unbeamed) quasar (g = 14.5 ABmag, K = 11.9 Vegamag) and a supermassive black hole, that appears from Earth to be in the constellation Centaurus at RA 11h44m and Declination –43, near the Southern Cross (Crux). The SkyMapper Southern Survey (SMSS) was used to ascertain its spectral properties.

Key takeaways

J1144−4308 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect J1144−4308 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of J1144−4308 from memory before moving on to harder problems.

Reference excerpt

SMSS J114447.77−430859.3 or J1144 or J1144−4308 is a very bright (unbeamed) quasar (g = 14.5 ABmag, K = 11.9 Vegamag) and a supermassive black hole, that appears from Earth to be in the constellation Centaurus at RA 11h44m and Declination –43, near the Southern Cross (Crux). The SkyMapper Southern Survey (SMSS) was used to ascertain its spectral properties. J1144 was identified during a search for binary stars. Despite being relatively bright, it had escaped classification as a quasar in earlier searches, which avoided the crowded fields near the galactic equator. After examining various data sets, the study group determined that J1144 is the most intrinsically luminous quasar known over the last ~9 Gyr of cosmic history, having a luminosity 8 times greater than 3C 273 in Virgo. According to the lead researcher Dr Christofer Onken, of the Australian National University: While black holes are themselves not visible; their gravity is so great that not even light can escape them, they are observable because of the matter that swirls around them.

References

Illustrations

Worked examples

Example 1 — a first encounter with J1144−4308

Start with the simplest possible case. Write down what J1144−4308 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 J1144−4308 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 J1144−4308 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 J1144−4308

In research: J1144−4308 appears in science 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 J1144−4308 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: J1144−4308 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Centaurus, Quasars, so understanding it makes those chapters shorter.
In everyday life: Look for J1144−4308 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 J1144−4308 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what J1144−4308 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 J1144−4308 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is J1144−4308 in simple terms?

Why does J1144−4308 matter?

Because it connects several science 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 J1144−4308?

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 J1144−4308.