astronomy

SDSS J104902.07+542348.9

SDSS J104902.07+542348.9 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 J104902.07+542348.9 rather than just read about it. In short: SDSS J104902.07+542348.9 also known as [LHC2018] J162.25867+54.39699, is a radio galaxy located in the constellation of Ursa Major. The redshift of the galaxy is estimated to be (z) 0.249.

Key takeaways

SDSS J104902.07+542348.9 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 J104902.07+542348.9 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J104902.07+542348.9 from memory before moving on to harder problems.

Reference excerpt

SDSS J104902.07+542348.9 also known as [LHC2018] J162.25867+54.39699, is a radio galaxy located in the constellation of Ursa Major. The redshift of the galaxy is estimated to be (z) 0.249.

Description SDSS J104902.07+542348.9 is an elliptical galaxy in stages of a gravitational interaction with another galaxy. It is also the brightest cluster galaxy of the WHL J104902.1+542349 galaxy cluster with 15 confirmed galaxy members. The R-band magnitude of the galaxy has been calculated to be 16.94 magnitude while its absolute magnitude is -23.63. The nucleus is found to be active and it has been categorized as a non-bent compact radio galaxy with its total flux density estimated to be 16.40 mJy by NRAO VLA Sky Survey (NVSS). The radio source morphology is mainly elongated, described as a single elliptical profile component although radio imaging made with NVSS suggested the radio emission is blended together with other radio sources. A radio core is detected and it has a core flux density of 12.80 mJy while the radio emission has the same flux density as the core. The total radio flux density at 1.4 GHz is 16.4 mJy while the total radio power is 3.10 × 1024 WHz−1. A study has found the stellar mass of the galaxy is 11.33 M☉. The log radio luminosity is 24.47 W Hz−1 whereas the rest frame r0.1 magnitude is -22.74 with further evidence that the central AGN (active galactic nucleus) is powering the source. The infrared J-band and H-band magnitudes of the galaxy are estimated to be 16.19 and 15.34 respectively while the W3 band magnitude is 11.98.

References

External links SDSS J104902.07+542348.9 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 SDSS J104902.07+542348.9

Start with the simplest possible case. Write down what SDSS J104902.07+542348.9 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 J104902.07+542348.9 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 J104902.07+542348.9 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 J104902.07+542348.9

In research: SDSS J104902.07+542348.9 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 J104902.07+542348.9 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 J104902.07+542348.9 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Interacting galaxies, LEDA objects, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J104902.07+542348.9 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 J104902.07+542348.9 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J104902.07+542348.9 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 J104902.07+542348.9 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J104902.07+542348.9 in simple terms?

SDSS J104902.07+542348.9 also known as [LHC2018] J162.25867+54.39699, is a radio galaxy located in the constellation of Ursa Major. The redshift of the galaxy is estimated to be (z) 0.249.

Why does SDSS J104902.07+542348.9 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 J104902.07+542348.9?

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 J104902.07+542348.9.