astronomy

Markarian 382

Markarian 382 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 382 rather than just read about it. In short: Markarian 382 is a Type 1 Seyfert galaxy with an active galactic nucleus, located in the constellation of Lynx. The redshift of the galaxy is (z) 0.0331 and it was first discovered in the 1415 GHz survey by A.G. de Bruyn and A.S.

Key takeaways

Markarian 382 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 382 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Markarian 382 from memory before moving on to harder problems.

Reference excerpt

Markarian 382 is a Type 1 Seyfert galaxy with an active galactic nucleus, located in the constellation of Lynx. The redshift of the galaxy is (z) 0.0331 and it was first discovered in the 1415 GHz survey by A.G. de Bruyn and A.S. Wilson in November 1976. This galaxy has been classified as radio-quiet.

Description Markarian 382 has been specifically categorized as a narrow-line Seyfert galaxy. It is known to be X-ray variable with two flux states shown on high and low levels. When it underwent a high flux state, its optical spectrum has a soft appearance, which is mainly characterized by a low fractional variability state displayed in X-ray bands. When reaching a low flux state, the spectrum is the opposite. The host galaxy of Markarian 382 is a barred spiral galaxy of type SBa based on imaging made with Hubble Space Telescope (HST), modeled by a single bulge and disk showing presence of spiral arms. When imaged, it is found to display a bar surrounded by a ring feature, with its spiral structure forming a pseudo-ring on its outer side. There is also a presence of a dust lane found to be curved and located northwest from the central bright nucleus, and also along the edge of a stellar bar. The central supermassive black hole of Markarian 382 is estimated to be 0.90 ± 0.12 × 107 M☉. A study published in December 2022, has estimated the black hole as 6.50+0.19-0.29 M☉ instead with an Eddington luminosity of 0.81 LEdd. When observed in energy band, the X-ray spectrum contains two warm absorbing components with turbulent velocities of 100 and 100 kilometers per seconds. An absorption system is found around Markarian 382. When observed, it is found to be made up of at least four velocity components. Upon further observations, there are two H I components classified as weak with measured column densities of around 1012.8 and 1013.3 cm−2 and blueshifted velocities of -62 and -228 kilometer per seconds. Doubly ionized silicon absorption has also been detected in additional.

References

External links Markarian 382 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images Markarian 382 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with Markarian 382

Start with the simplest possible case. Write down what Markarian 382 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 382 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 382 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 382

In research: Markarian 382 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 382 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 382 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1976, Barred spiral galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for Markarian 382 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 382 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Markarian 382 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 382 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Markarian 382 in simple terms?

Why does Markarian 382 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 382?

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 382.