astronomy

Markarian 463

Markarian 463 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 Markarian 463 rather than just read about it. In short: Markarian 463 (Mrk 463) known as UGC 8850, is a galaxy merger located in the constellation Boötes. It is located 706 million light years from Earth.

Key takeaways

Markarian 463 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Markarian 463 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Markarian 463 from memory before moving on to harder problems.

Reference excerpt

Markarian 463 (Mrk 463) known as UGC 8850, is a galaxy merger located in the constellation Boötes. It is located 706 million light years from Earth. It is classified a double nucleus Seyfert galaxy.

Characteristics Markarian 463 is a late stage galaxy merger, a product of two gas-rich spiral galaxies colliding with one another. According to optical and near-infrared observations, the galaxy is shown to have a complex morphology with star forming clumps and curved tidal tails. It has a luminosity of LIR (8–1000μm) = 1011.8 LΘ making it a luminous infrared galaxy. It contains a compact radio flux in either linear or elongated structure. Using spectra captured by the Infrared Spectrograph installed on Spitzer Space Telescope, emission lines are detected in Markarian 463 hinting a warm supply of molecular gas. A broadband X-ray spectral analysis revealed two obscured nuclei designated as Markarian 463W and Markarian 463E, with an estimated projected separation of ~ 3.8 kiloparsec. This finding makes the galaxy a dual active galactic nucleus and is the third closest physical pair known after NGC 6240 and NGC 3758. The two nuclei has a luminosity of L2–10keV = 1.5×1043 and 3.8×1042 erg cm−2 s−1. Both are active and are expected to drawn close to each other over timescales of 108 years. The western nucleus has a moderate radio luminosity equivalent of an extremely luminous starburst galaxy or a Seyfert galaxy through imaging detections at 6 and 20 centimeters. The eastern nucleus however, is much brighter compared to the western nucleus, and is classified a type II Seyfert galaxy. It is found offset from its peak flux and shows polarized conical wind. With a half-opening angle of ~ 15 degrees, its wind displays three mass ejection periods. Using infrared spectroscopy, the eastern nucleus hosts a hidden Seyfert 1 nucleus located southwards but not co-spatial. According to Chandra X-ray data, the supermassive black hole in the nucleus of Markarian 463E has a much higher accretion rate of ~ 5x. It is also associated with emission and continuum lines. It is also shown it is older compared to the nucleus of Markarian 463W, given the northern outflowing cloud and southern emission region appears generally aligned with the biconical gradient. An ALMA 12CO (2–1) observation also finds the two nuclei have molecular gas reservoirs estimated of ~ 109 MΘ and ~ 5 × 108 MΘ respectively. Given enough molecular gas provided, it is enough to feed both black holes in the galaxy. Markarian 463 has an optical jet originating from the Seyfert nucleus according to Hubble Space Telescope imaging. The jet is found to reach the end at the radio source found 1.2 arcsecs away, and is measured 0.84 arcsecs with a position angle of 182 degrees. Part of the galaxy shows emission due to oxygen, first identified with Hubble. This was interpreted as a possible extended emission-line region (EELR).

Gallery

References

Illustrations

Worked examples

Example 1 — a first encounter with Markarian 463

Start with the simplest possible case. Write down what Markarian 463 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 Markarian 463 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 Markarian 463 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 Markarian 463

In research: Markarian 463 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 Markarian 463 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: Markarian 463 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Boötes, IRAS catalogue objects, Interacting galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for Markarian 463 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 Markarian 463 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Markarian 463 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 Markarian 463 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Markarian 463 in simple terms?

Markarian 463 (Mrk 463) known as UGC 8850, is a galaxy merger located in the constellation Boötes. It is located 706 million light years from Earth.

Why does Markarian 463 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 Markarian 463?

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 Markarian 463.