astronomy

SDSS J1239+5314

SDSS J1239+5314 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 SDSS J1239+5314 rather than just read about it. In short: SDSS J1239+5314 also known as SDSS J123915.40+531414.6, is a Type 1 Seyfert galaxy located in the constellation of Ursa Major. The redshift of the galaxy is (z) 0.201 and it was first discovered by astronomers in June 2010, whom they classified a double-peaked profile active galactic nucleus (AGN).

Key takeaways

SDSS J1239+5314 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SDSS J1239+5314 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J1239+5314 from memory before moving on to harder problems.

Reference excerpt

SDSS J1239+5314 also known as SDSS J123915.40+531414.6, is a Type 1 Seyfert galaxy located in the constellation of Ursa Major. The redshift of the galaxy is (z) 0.201 and it was first discovered by astronomers in June 2010, whom they classified a double-peaked profile active galactic nucleus (AGN).

Description SDSS J1239+5314 is categorized as a Type 1 AGN. It is also a galaxy merger with the two nuclei estimated to be have a physical separation of 4.1 kiloparsecs away from each other. The total K-band magnitudes of the components are 14.4 and 14.8 respectively. The total rest frame radio luminosity at 5 GHz frequencies is estimated to be 24.1 W Hz−1. Observations made in March 2011, showed it has a Fanaroff-Riley Type II morphology with a faint radio core. The total integrated flux density of the source is found to be 23.11 mJy. The star formation is estimated to be 6.013.64.2 M☉ per year while the total stellar mass is 11.810.530.59 M☉. A study published in 2015 has found there are two emission components present with the separation approximately around 1.3 kiloparsecs. When observed, the blueshifted component has a stellar bulge that is coincident with it, while the redshifted component does not. There is also another emission component present with a larger distance of 3.98 kiloparsecs and coincident with the stellar bulge of the southwest nucleus. In 2022, the galaxy was found to be a confirmed X-shaped winged radio galaxy with the radio lobes being aligned from northeast to southwest direction. The position angle between the lobes is estimated to be 79°. Evidence also found the wing feature on southeast side is much longer compared to the northwestern wing.

References

External links SDSS J1239+5314 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images SDSS J1239+5314 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with SDSS J1239+5314

Start with the simplest possible case. Write down what SDSS J1239+5314 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 SDSS J1239+5314 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 SDSS J1239+5314 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 SDSS J1239+5314

In research: SDSS J1239+5314 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 SDSS J1239+5314 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: SDSS J1239+5314 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 2010, Galaxy mergers, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J1239+5314 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 SDSS J1239+5314 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J1239+5314 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 SDSS J1239+5314 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J1239+5314 in simple terms?

Why does SDSS J1239+5314 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 SDSS J1239+5314?

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 SDSS J1239+5314.