Term
| what is a galaxy with extremely violent energy release in its nucleus called? |
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Definition
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Term
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Definition
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Term
| what is most of the light from a normal spiral galaxy? what kind of spectra does it contain? |
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Definition
| starlight; and absorption line spectra |
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Term
| what type of spiral galaxy has an extremely bright core with emission spectra? |
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Definition
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Term
| What is Seyfret's likely power source? |
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Definition
| accretion onto a supermassive black hole |
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Term
| what are active galaxies often associated with? |
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Definition
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Term
| True or false: Material in the jets above moves at relativistic speed. |
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Definition
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Term
| What are radio jets powered by? |
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Definition
| accretion of matter onto supermassive black hole |
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Term
| how does the material stay in the radio jet? |
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Definition
| twisted magnetic fields confine material to jet and produce sychrotron radiation |
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Term
| what are Seyfert I galaxies brightest in? Seyfert II galaxies? |
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Definition
| UV and Xray for I; IR for II |
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Term
| What do radio galaxies have? |
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Definition
| powerful radio lobes at end points of jets where power is dissipated |
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Term
| what are objects with properties very similiar to quasars but no emission lines? |
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Definition
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Term
| A radio galaxy is an AGN with a radio jet point toward or perpendicular to us? |
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Definition
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Term
| A quaser is an AGN with a radio jet point towards or perpendicular to uS? |
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Definition
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Term
| In normal galaxies, xray sources are usually what? |
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Definition
| accreting stellar mass black holes |
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Term
| A star thats wandering too close to a supermassive black hole can trigger what? |
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Definition
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Term
| Quasars show strong variablilty over time scales of how long? |
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Definition
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Term
| Spectral lines of quasars show what kind of shift? |
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Definition
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Term
| Spectral lines of quasars are (very far from/moderately far from/near to)the milky way |
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Definition
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Term
| What were active galaxies known as before? |
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Definition
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