astronomy

SDSS J102709.94+390805.1

SDSS J102709.94+390805.1 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 J102709.94+390805.1 rather than just read about it. In short: SDSS J102709.94+390805.1 known as [BOG2010] 1075981, is a radio galaxy located in the constellation of Leo Minor. The redshift of the galaxy is (z) 0.337 and it was first discovered as an astronomical radio source by astronomers from the Bologna Sky Survey in February 1985.

Key takeaways

SDSS J102709.94+390805.1 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 J102709.94+390805.1 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J102709.94+390805.1 from memory before moving on to harder problems.

Reference excerpt

SDSS J102709.94+390805.1 known as [BOG2010] 1075981, is a radio galaxy located in the constellation of Leo Minor. The redshift of the galaxy is (z) 0.337 and it was first discovered as an astronomical radio source by astronomers from the Bologna Sky Survey in February 1985.

Description SDSS J102709.94+390805.1 is an elliptical galaxy with an morphological classification of Type E. It is a red luminous galaxy residing as the brightest cluster galaxy (BCG) of the galaxy cluster, WHL J102709.9+390805, with 23 confirmed galaxy member candidates. The r-band magnitude of the galaxy is found to be 17.47 magnitude. Its absolute magnitude is -23.76. The galaxy hosts an active galactic nucleus. It is classified as a Fanaroff-Riley Class Type I radio galaxy of non bent-tail subtype with its total flux density measured to be 43.60 mJy obtained by NRAO VLA Sky Survey (NVSS) at 1.4 GHz frequencies. It also contains an ultra steep spectrum source with the spectral index of -1.02α between 352 MHz and 1.4 GHz. The total radio luminosity is found to be 24.93 W Hz-1 at 1.4 GHz. The radio morphology is mainly elongated, described by a single elliptical profile component or as a compact point-like component according to NVSS contour imaging. There is a presence of a radio core with its total core flux density estimated as 40.09 mJy. The total radio flux density is 43.40 mJy. The luminosity distance of the source is 1799.3 megaparsecs. The radio power has been calculated as 16.84 × 1024 WHz-1.

References

External links SDSS J102709.94+390805.1 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 J102709.94+390805.1

Start with the simplest possible case. Write down what SDSS J102709.94+390805.1 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 J102709.94+390805.1 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 J102709.94+390805.1 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 J102709.94+390805.1

In research: SDSS J102709.94+390805.1 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 J102709.94+390805.1 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 J102709.94+390805.1 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1985, Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J102709.94+390805.1 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 J102709.94+390805.1 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J102709.94+390805.1 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 J102709.94+390805.1 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J102709.94+390805.1 in simple terms?

Why does SDSS J102709.94+390805.1 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 J102709.94+390805.1?

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 J102709.94+390805.1.