astronomy

PG 0026+129

PG 0026+129 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 PG 0026+129 rather than just read about it. In short: PG 0026+129 is a Seyfert 1 galaxy and a radio-quiet quasar located in the constellation of Pisces. The redshift for this object is (z) 0.142 and it was first discovered by R.F.

Key takeaways

PG 0026+129 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PG 0026+129 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PG 0026+129 from memory before moving on to harder problems.

Reference excerpt

PG 0026+129 is a Seyfert 1 galaxy and a radio-quiet quasar located in the constellation of Pisces. The redshift for this object is (z) 0.142 and it was first discovered by R.F. Green in 1976 during a spectroscopic examination alongside three other quasars.

Description PG 0026+129 displays a rich system of emission-lines in its spectrum. However, the spectrum is very unusual since there is evidence of strong emission originating from its doubly ionized iron multiplets at 4570, 5190 and 5320 Å. In addition, the ultraviolet spectrum of the object is described as having a broad hump. The host galaxy of PG 0026+129 is an elliptical galaxy with a smooth appearance based on high-resolution studies. The appearance of the galaxy is undisturbed but elongated slightly from east to west direction with no signs of an apparent structure. The host galaxy has star-forming regions with the stellar mass of the stars in the H-band estimated to be 10.9 M☉ and a total star formation rate of 16+6-8 M☉ per year based on its Hβ and Paα luminosity. The radio source of PG 0026+129 is described as compact and extended based on Very Large Array observations, with half of its radio flux being contained within 2.5 arcsecond region. However its flat-spectrum radio core remains unresolved. B-Array imaging found the source has an elongation north to south. A nuclear component has been found with an extension of two arcseconds towards the south. PG 0026+129 is found to have two distinctive broad-line regions. Based on studies, it shows a broad Hβ line profile composed of one intermediate-width and one very broad component with full width at half maximum velocities of 1,964 ± 18 and 7,570 ± 83 kilometer per seconds. There is also evidence of velocity-resolved delays with time lags of 30 to 50 days at the Hβ line core with no signs of time lags in its wings. A supermassive black hole mass of (3.93 ± 0.96) × 106 M☉ has been calculated for the object based on its Paschen hydrogen emission line width and its continuum luminosity. The narrow-line region of PG 0026+129 is estimated to have a radius of 2,281 ± 40 parsecs with a surface brightness of 1.47 10−17 erg s−1 towards the edge of the region.

References

External links PG 0026+129 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images PG 0026+129 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with PG 0026+129

Start with the simplest possible case. Write down what PG 0026+129 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 PG 0026+129 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 PG 0026+129 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 PG 0026+129

In research: PG 0026+129 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 PG 0026+129 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: PG 0026+129 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 1976, Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for PG 0026+129 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 PG 0026+129 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PG 0026+129 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 PG 0026+129 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PG 0026+129 in simple terms?

PG 0026+129 is a Seyfert 1 galaxy and a radio-quiet quasar located in the constellation of Pisces. The redshift for this object is (z) 0.142 and it was first discovered by R.F.

Why does PG 0026+129 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 PG 0026+129?

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 PG 0026+129.