Statements (58)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:astronomy
|
| gptkbp:are |
found at great distances from Earth
powered by supermassive black holes very luminous objects |
| gptkbp:are_often_detected_by |
their emission lines
|
| gptkbp:are_often_studied_for_their |
chemical composition
|
| gptkbp:are_often_used_to_probe |
intergalactic medium
|
| gptkbp:are_thought_to_be_powered_by |
accretion of material onto black holes
|
| gptkbp:can |
mass millions to billions of solar masses
|
| gptkbp:can_be |
radio-loud or radio-quiet
|
| gptkbp:can_be_found_in |
the Sloan Digital Sky Survey
various wavelengths including radio and optical |
| gptkbp:can_detect |
space telescopes
X-ray wavelengths optical telescopes their gravitational lensing effects |
| gptkbp:can_outshine |
entire galaxies
|
| gptkbp:can_vary_in_brightness |
over time
|
| gptkbp:emissions_standard |
large amounts of energy
|
| gptkbp:emit_radiation_across |
the electromagnetic spectrum
|
| gptkbp:exhibits |
redshift
variability on timescales of days to years |
| https://www.w3.org/2000/01/rdf-schema#label |
quasars
|
| gptkbp:influence |
their host galaxies
|
| gptkbp:is_analyzed_in |
the expansion of the universe
the nature of dark energy |
| gptkbp:is_associated_with |
gptkb:active_galactic_nuclei
|
| gptkbp:is_believed_to |
a phase in the evolution of galaxies
|
| gptkbp:is_characterized_by |
high luminosity
|
| gptkbp:is_essential_for |
gptkb:cosmology
galaxy formation the evolution of the universe the large-scale structure of the universe |
| gptkbp:is_explored_in |
the structure of the universe
|
| gptkbp:is_observed_in |
up to redshift z > 7
|
| gptkbp:is_often_associated_with |
gamma-ray bursts
strong magnetic fields high-energy astrophysical phenomena |
| gptkbp:is_often_involved_in |
astrophysical research
|
| gptkbp:is_often_seen_in |
the early universe
clusters of galaxies the centers of galaxies the most massive galaxy clusters. |
| gptkbp:is_said_to_be |
the brightest objects in the universe
the most distant objects in the universe |
| gptkbp:is_studied_for |
gptkb:dark_matter
the early universe the evolution of galaxies over time |
| gptkbp:is_studied_in |
gptkb:spectroscopy
the cosmic microwave background |
| gptkbp:is_tested_for |
the laws of physics under extreme conditions
|
| gptkbp:is_used_for |
cosmological probes
|
| gptkbp:provides_information_on |
the formation of supermassive black holes
|
| gptkbp:scientific_classification |
their spectral properties
type I or type II |
| gptkbp:were_first_identified |
in the 1960s
|
| gptkbp:bfsParent |
gptkb:spectrometer
|
| gptkbp:bfsLayer |
3
|