astronomy

SDSS J0849+1114

SDSS J0849+1114 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 J0849+1114 rather than just read about it. In short: SDSS J0849+1114 (SDSS J084905.51+111447.2) is a late-stage galaxy merger forming from a trio of galaxies located in the constellation of Cancer. With a redshift of 0.077, they are located 1.06 billion light-years from Earth.

Key takeaways

SDSS J0849+1114 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 J0849+1114 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J0849+1114 from memory before moving on to harder problems.

Reference excerpt

SDSS J0849+1114 (SDSS J084905.51+111447.2) is a late-stage galaxy merger forming from a trio of galaxies located in the constellation of Cancer. With a redshift of 0.077, they are located 1.06 billion light-years from Earth. First discovered as a triple active galactic nucleus (AGN) candidate in a Sloan Digital Sky Survey study published in 2011, they received significant attention when astronomers discovered it harbors three supermassive black holes in its center.

Characteristics SDSS J0849+1114 is made up of three closely spaced interacting spiral galaxies, all showing signs of distortion. It has tidal tail features indicative of a late-stage merger. The nuclei in SDSS J0849+1114 are considered active and the galaxies classified as type 2 Seyferts according to long-slit spectroscopy observations from Apache Point Observatory. A study also mentions out of the triple AGN candidates studied, SDSS J0849+1114 is also the first known triple Seyfert nucleus. In addition, they are classified as luminous infrared galaxies with luminosity of 8-1000 μm. According to a study published in 2022, the primary nucleus of SDSS J0849+1114 is more powerful compared to the secondary and tertiary nuclei. Further evidence also points out it has a double-sided jet with its orientation changing by 20 degrees, explaining the angular momentum of the black hole might be changed by a merger-enhanced accretion. The secondary nucleus shows absence of radio emission at all frequencies while the tertiary nucleus also has a two-sided jet but shown enlarging a radio lobe. Based on the internal energy of the lobe, it is estimated 5.0 × 1055 erg. Furthermore, the three nuclei showed extended disc and budge components which the two showed signs of tidal stripping by the main nucleus.

Supermassive black holes The three supermassive black holes in SDSS J0849+1114 are found colliding together with a separation gap of only between 10,000 and 30,000 light-years. All of them are surrounded by dusty structures and each of the black holes have a mass of ~107.5 M☉, 106.4 M☉ and 106.7 M☉ respectively. According to Chandra and NuSTAR observations, one of the black holes showed large quantities of interstellar matter surrounding its torus. It is estimated that the black holes from the merging galaxies will form a gravitationally bound triple black hole system within a few billion years.

References

Illustrations

Worked examples

Example 1 — a first encounter with SDSS J0849+1114

Start with the simplest possible case. Write down what SDSS J0849+1114 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 J0849+1114 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 J0849+1114 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 J0849+1114

In research: SDSS J0849+1114 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 J0849+1114 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 J0849+1114 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cancer (constellation), Galaxy mergers, IRAS catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J0849+1114 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 J0849+1114 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J0849+1114 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 J0849+1114 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J0849+1114 in simple terms?

Why does SDSS J0849+1114 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 J0849+1114?

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 J0849+1114.