astronomy

NGC 4332

NGC 4332 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 NGC 4332 rather than just read about it. In short: NGC 4332 is a barred spiral galaxy and a starburst galaxy located 128 million light-years away in the constellation Draco. The galaxy was discovered by astronomer William Herschel on March 20, 1790.

Key takeaways

NGC 4332 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NGC 4332 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 4332 from memory before moving on to harder problems.

Reference excerpt

NGC 4332 is a barred spiral galaxy and a starburst galaxy located 128 million light-years away in the constellation Draco. The galaxy was discovered by astronomer William Herschel on March 20, 1790. NGC 4332 is host to a supermassive black hole with an estimated mass of 9.5×107 solar masses.

NGC 4256 Group NGC 4332 is a member of the NGC 4256 Group, and is located in a subgroup surrounding the galaxy NGC 4210. The NGC 4256 Group is located within the Canes Venatici-Camelopardalis Cloud, which lies in the First Upper Plane of the Virgo Supercluster. According to A. M. Garcia, the NGC 4256 group has at least 7 members. The other galaxies in the group are NGC 4108, NGC 4210, NGC 4221, NGC 4256, NGC 4513 and NGC 4108B (PGC 38461).

SN 2009an NGC 4332 has hosted one supernova, a Type Ia supernova designated as SN 2009an that had an apparent magnitude of 15.4. The supernova was discovered by Giancarlo Cortini and Stefano Antonellini with a 35-cm telescope at the Monte Maggiore Observatory in Predappio, Italy on February 27, 2009. It was independently discovered by Petri Kehusmaa of Hyvinkaa, Finland and Mikko Paivinen of Rajamaki, Finland on February 28, 2009, using a 28-cm Schmidt-Cassegrain reflector. SN 2009an had absolute magnitude of -18.841 ± 5 in the blue part of the spectrum. This makes it dimmer than a normal Type Ia supernova. Also, SN 2009an had a light curve that declined a lot faster than a normal Type Ia supernova. Additionally, the bolometric luminosity is estimated at 42.89 erg/s, implying that about 0.41 solar masses of were synthesized in the supernova. However, to account for additional flux lost from UV and NIR light bands, the estimate for the amount of nickel-56 thought to have formed in the supernova increases to 0.50 solar masses. Lastly, spectroscopic data show that SN 2009an has high-velocity features which are observed in the calcium triplet during its pre-maximum and early post-maximum phases. However, the post-maximum spectral evolution resembles a normal Type Ia supernovae, with SN 2009an containing broad Si II 6355 Å lines and Si II 5972 Å lines that are stronger than a normal Type Ia supernova. These properties make Sn 2009an most similar to another Type Ia supernova known as SN 2004eo. It is thought that supernovae like SN 2009an and SN 2004eo form from the explosion of a white dwarf with lower amounts of kinetic energy than a normal Type Ia supernova and produce more stable elements from the Iron-Group of the periodic table such as iron, nickel and others. These types of Type Ia supernovae account for only 15% of all observed Type Ia supernovae known as non-standard or transitional Type Ia events.

See also List of NGC objects List of NGC objects (4001–5000) NGC 4513-Ring galaxy in the NGC 4256 Group

References

External links

NGC 4332 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 NGC 4332

Start with the simplest possible case. Write down what NGC 4332 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 NGC 4332 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 NGC 4332 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 NGC 4332

In research: NGC 4332 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 NGC 4332 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: NGC 4332 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1790, Barred spiral galaxies, Draco (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for NGC 4332 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 NGC 4332 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 4332 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 NGC 4332 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 4332 in simple terms?

NGC 4332 is a barred spiral galaxy and a starburst galaxy located 128 million light-years away in the constellation Draco. The galaxy was discovered by astronomer William Herschel on March 20, 1790.

Why does NGC 4332 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 NGC 4332?

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 NGC 4332.