astronomy

MCG +08-11-011

MCG +08-11-011 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 MCG +08-11-011 rather than just read about it. In short: MCG +08-11-011 (MCG +8-11-11), also known as UGC 3374, is a galaxy located in the constellation of Auriga. It is located 401 million light years from Earth and is classified as a Seyfert galaxy.

Key takeaways

MCG +08-11-011 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect MCG +08-11-011 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of MCG +08-11-011 from memory before moving on to harder problems.

Reference excerpt

MCG +08-11-011 (MCG +8-11-11), also known as UGC 3374, is a galaxy located in the constellation of Auriga. It is located 401 million light years from Earth and is classified as a Seyfert galaxy. MCG +08-11-011 is an active Seyfert 1 galaxy, it hosts an active galactic nucleus (AGN) powered by a supermassive black hole, which produces strong X-ray and ultraviolet emission as material accretes onto it. The galaxy has been extensively observed by X-ray observatories such as XMM-Newton, Suzaku, and NuSTAR, making it an important object for studying the physics of black hole accretion and the structure of the corona in active galaxies.

Characteristics MCG +8-11-11 is classified a type 1 Seyfert galaxy. It is face-on spiral galaxy located at a projected distance of 123 megaparsecs. It has a soft X-ray luminosity originating from its nuclear core varying between 0.5 and 1×1044 erg·s−1. It is also one of the brightest active galactic nuclei (AGN) observed in X-ray bands but radio-quiet. Through detected by most X-ray satellites, the galaxy was not one of the targets noticed by Chandra X-ray Observatory. It has an X-ray spectrum fitted by an estimated power law of Γ = 1.8 with an undetermined iron line likely originating from distant matter. The galaxy has soft gamma-ray emission at 3.9 σ level, higher than 90 keV. Additionally, MCG +8-11-11 contains X-ray fluxes. Based on observations by the INTErnational Gamma-ray Astrophysics Observation (INTEGRAL), they have measurements of F20−100 keV = 8.46×10−11 erg·cm−2·s−1 and F2−10 keV = 5.62×10−11 erg·cm−2·s−1 respectively. Based from a spectral analysis conducted by NuSTAR, the galaxy has a bolometric luminosity estimated as Lbol = 14.2×1044 erg·s−1. Furthermore, the black hole in MCG +8-11-11 has a mass of MBH = 7.19 ± 0.02 MΘ and an Eddington ratio of 7.54×10−1. The thermal emission from its accretion disk is hot with a temperature of kT = 0.088+0.018−0.007 keV.

Observations MCG +8-11-11 has been observed in many occasions. In July 1995, its powerful gamma-ray flux was detected during a High Energy Astronomical Telescope balloon flight, suggesting its hard X-ray spectral feature was caused by a double-Compton backscattering exerted on its external cloud. A Suzaku observation conducted in 2010 finds out the galaxy exhibits spectral signatures from its accretion disk. In November 2014, data from the observation by the 118 ks Chandra High Energy Transmission Gratings found MCG +8-11-11 shows lack of warm absorption and its Compton reflection signatures are described by out of direction material from the naked eye, based on an inclination angle of θ = 41+18−30 obtained by a MYTorus model. Between 2019 and 2020, it was determined that MCG +8-11-11 has a host-corrected AGN luminosity of 5100 Ά of (4.21±0.65)×1043 erg·s−1 and a large disk-size according to a photometric reverberation mapping conducted by the Wise Observatory.

Radio source MCG +8-11-11 hosts a triple radio source in its center with a projected size of 400 parsecs and an S-shaped morphology. However the central compartment of the source has a small diameter of 30 parsecs and is possibly confirmed as the active galaxy's core. The source is also found embedded in diffused emission with a major-axis position angle similar to its bar but offset by 50 degrees.

References

External links MCG +08-11-011 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images UGC 3374 on SIMBAD

Illustrations

Worked examples

Example 1 — a first encounter with MCG +08-11-011

Start with the simplest possible case. Write down what MCG +08-11-011 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 MCG +08-11-011 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 MCG +08-11-011 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 MCG +08-11-011

In research: MCG +08-11-011 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 MCG +08-11-011 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: MCG +08-11-011 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Auriga, IRAS catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for MCG +08-11-011 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 MCG +08-11-011 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MCG +08-11-011 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 MCG +08-11-011 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is MCG +08-11-011 in simple terms?

MCG +08-11-011 (MCG +8-11-11), also known as UGC 3374, is a galaxy located in the constellation of Auriga. It is located 401 million light years from Earth and is classified as a Seyfert galaxy.

Why does MCG +08-11-011 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 MCG +08-11-011?

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 MCG +08-11-011.