astronomy

SDSS J2358−0009

SDSS J2358−0009 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 J2358−0009 rather than just read about it. In short: SDSS J2358−0009 also known as SDSS J2358−00, is a Type 2 quasar located in the constellation of Pisces. The redshift of the object is (z) 0.402 and it was first discovered by astronomers in November 2006 from the Sloan Digital Sky Survey (SDSS).

Key takeaways

SDSS J2358−0009 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 J2358−0009 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J2358−0009 from memory before moving on to harder problems.

Reference excerpt

SDSS J2358−0009 also known as SDSS J2358−00, is a Type 2 quasar located in the constellation of Pisces. The redshift of the object is (z) 0.402 and it was first discovered by astronomers in November 2006 from the Sloan Digital Sky Survey (SDSS).

Description SDSS J2358−0009 is a Type 2 quasar with an estimated doubly ionized oxygen [O III] emission line luminosity of 9.96 Lʘ based on observations made by the Chandra X-ray Observatory. The host galaxy of the quasar imaged by the Hubble Space Telescope (HST) is interacting with a companion star-forming galaxy located at a projected distance of 29 kiloparsecs, with the presence of tidal tails and shell-like structures east of the host's nucleus. The tidal tail of the companion is linking with another companion at an unknown redshift. There is an elongated knot feature located 30 kiloparsecs east from the host, with a knotty internal substructure and mainly being dominated by continuum radio emission. A tidal bridge with a surface brightness of 22.7 magnitude is linking between the host and the companion. A study found the quasar is compton-thick based on its [O III] luminosity ratio. An extended emission-line region (EELR) is present with the extended ionized nebula being photoionized by the quasar. The nebula has a maximum size of 64 kiloparsecs, while the EELR luminosity is 5.1 ± 0.1 × 1041 erg s-1. There are also detections of ionized outflows from the quasar with the [O III] lines displaying a full width at half maximum of 440 ± 50. The [O III] lines have no profile asymmetries, with the lines having an [O III] flux of 75 ± 6 × 1016 erg-1 s-2. The velocity shift relative to the [O III] narrow core component is 10 ± 40 kilometers per second. Young stellar populations have also been detected inside the quasar, contributing between 88% and 95% of the flux, with the population age estimated to be 0.04-0.05 billion years.

References

External links SDSS J2358−0009 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images SDSS J2358−0009 on SIMBAD SDSS J2358−0009 on HyperLeda

Illustrations

Worked examples

Example 1 — a first encounter with SDSS J2358−0009

Start with the simplest possible case. Write down what SDSS J2358−0009 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 J2358−0009 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 J2358−0009 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 J2358−0009

In research: SDSS J2358−0009 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 J2358−0009 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 J2358−0009 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 2006, Interacting galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J2358−0009 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 J2358−0009 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J2358−0009 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 J2358−0009 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J2358−0009 in simple terms?

Why does SDSS J2358−0009 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 J2358−0009?

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 J2358−0009.