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Showing 1 to 6 of 6 for “"quasar outflows"”.
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Observational Studies of Rare Quasar Outflows: the FeLoBALs
The absorption spectra of quasar outflows are studied in order to determine their kinematic and energetic properties and how they affect their host galaxy and its surroundings. If an outflow is sufficiently powerful to have an effect, a process known as active galactic nucleus (AGN) feedback, it …
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A Study of Quasar Outflows: Physical Characteristics and Feedback Effects
Quasars can affect their surrounding environment through a process known as active galactic nucleus (AGN) feedback, through which the quasar can curtail the formation of stars, regulate the evolution of its host galaxy, and affect its surrounding environment in other ways. One possible mechanism …
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Quasar Outflows: Their Scale, Behavior and Influence in the Host Galaxy
Quasar outflows are a major candidate for Active Galactic Nuclei (AGN) feedback, and their capacity to influence the evolution of their host galaxy depends on the mass-flow rate (M) and kinetic luminosity (E) of the outflowing material. Both quantities require measurement of the distance (R) to the …
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How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission
"Quasar-mode feedback" occurs when momentum and energy from the environment of accreting supermassive black hole couple to the host galaxy. One mechanism for such a coupling is by high-velocity (up to ~0.2c) quasar-driven ionized outflows, appearing as blue-shifted absorption and emission lines in …
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The Origins and Environments of Quasar Absorption Lines in the Sloan Digital Sky Survey
… Digital Sky Survey (SDSS), tens of thousands of quasar absorption line (QAL) systems have been identified to date. QAL catalogs currently extend to z ∼ 4.6 and provide unique probes of the large scale structure of baryonic matter in the high-redshift universe; yet many critical questions …
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A synoptic survey of narrow quasar absorption lines from the Sloan Digital Sky Survey
… to study the properties of thousands of quasar absorption lines (QALs) in the time domain. Systems of QALs have proven to be one of the most sensitive and unbiased probes of baryonic matter in the high-redshift Universe. Short timescale absorption variability is one tool that has been …