astronomy

MACS J1447.4+0827 BCG

MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG rather than just read about it. In short: MACS J1447.4+0827 BCG (short for MACS J1447.4+0827 Brightest Cluster Galaxy), is a massive elliptical galaxy residing as the brightest cluster galaxy of the X-ray luminous galaxy cluster, MACS J1447.4+0827 which is also known as RX J1447.4+0827. The redshift of the galaxy is estimated to be (z) 0.37 and it contains an active galactic nucleus (AGN) based on evidence of a central point-like region that is coincident w…

Key takeaways

MACS J1447.4+0827 BCG belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect MACS J1447.4+0827 BCG to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of MACS J1447.4+0827 BCG from memory before moving on to harder problems.

Reference excerpt

MACS J1447.4+0827 BCG (short for MACS J1447.4+0827 Brightest Cluster Galaxy), is a massive elliptical galaxy residing as the brightest cluster galaxy of the X-ray luminous galaxy cluster, MACS J1447.4+0827 which is also known as RX J1447.4+0827. The redshift of the galaxy is estimated to be (z) 0.37 and it contains an active galactic nucleus (AGN) based on evidence of a central point-like region that is coincident with its position.

Description MACS J1447.4+0827 BCG is classified as a central galaxy. When observed with the Hubble Space Telescope (HST), it is contains filament structures depicted as optically bright with an extent of around 25 kiloparsecs in total. Two of the filament structures are shown positioned from west to south and west to north respectively. The nucleus of the galaxy is active and it has been classified as a radio galaxy with the presence of strong emission lines in its optical spectrum. Radio imaging made by the Very Large Array (VLA), showed there is a compact radio component that coincides with an X-ray source and the presence of radio emission that is extending outwards by 160 kiloparsecs. There is also evidence of two X-ray cavities located both north and south from the BCG, with a cavity power of 6 × 1044 erg s−1.These cavities have an elliptical morphology and an extent of 32 kiloparsecs in. Two collimated radio jets emerge outwards with a measured radius of 20 kiloparsecs. A diffused component extends from the inner jet regions. This component is estimated to have a spectral index of -1.2 ± 1.0 and has a total radio power of 3.0 ± 0.3 × 1024 W Hz−1. A study also found the jets are also aligned together with the cavities. The mass of the central supermassive black hole of the BCG is estimated to be in the range of 9 to 10 × 109 M☉. The total star formation rate of the BCG is found be 60-80 M☉ per year. There is also evidence of a molecular gas reservoir region, elongated from east to west direction, with the total molecular gas mass estimated as 9 × 1010 M☉. A study showed detections of carbon oxide (CO) emitting components located in the center, and both the subregions located in the eastern and western directions. One of the components is shown to have a high velocity dispersion of 200 kilometers per seconds.

References

External links MACS J1447.4+0827 BCG on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images MACS J1447.4+0827 BCG on HyperLeda

Illustrations

Worked examples

Example 1 — a first encounter with MACS J1447.4+0827 BCG

Start with the simplest possible case. Write down what MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG

In research: MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG 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: MACS J1447.4+0827 BCG is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Boötes, Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MACS J1447.4+0827 BCG 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.
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Frequently asked questions

What is MACS J1447.4+0827 BCG in simple terms?

Why does MACS J1447.4+0827 BCG 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 MACS J1447.4+0827 BCG?

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 MACS J1447.4+0827 BCG.