New results on quasar outflows

Fred Hamann; Nissem Kanekar; Jason X. Prochaska; Michael T. Murphy; Nikola Milutinovic; Sara Ellison; Wim Ubachs; Gary Ferland

doi:10.1017/S1743921310006836

New results on quasar outflows

Fred Hamann, Nissem Kanekar, Jason X. Prochaska, Michael T. Murphy, Nikola Milutinovic, Sara Ellison, Wim Ubachs, Gary Ferland

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Accretion disk outflows are an important part of the quasar phenomenon. They might play a major role in distributing metals to the galactic surroundings, halting growth of the central black hole and providing kinetic energy "feedback" to regulate star formation in the host galaxies. Some models of galaxy evolution indicate that feedback requires kinetic energy luminosities, L_K, that are ∼5% of the quasar bolometric; L _K/L = M_wv²/2ηM_accc ∼ 5% is possible if M_w ∼ M_acc (with v ∼ 0.1c, and η ∼ 0.1). Here we describe results from two studies designed to test the theoretical energetics of radiatively driven outflows and derive observational constraints on the outflow geometry and physical properties emphasizing weaker outflow features like NALs and mini-BALs.

Original language	English
Pages (from-to)	399
Number of pages	1
Journal	Proceedings of the International Astronomical Union
Volume	5
Issue number	S267
DOIs	https://doi.org/10.1017/S1743921310006836
Publication status	Published - Aug 2009

Keywords

Galaxies: evolution
Line: formation
Quasars: absorption lines
Quasars: general

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1017/S1743921310006836

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AU - Hamann, Fred

AU - Kanekar, Nissem

AU - Prochaska, Jason X.

AU - Murphy, Michael T.

AU - Milutinovic, Nikola

AU - Ellison, Sara

AU - Ubachs, Wim

AU - Ferland, Gary

PY - 2009/8

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N2 - Accretion disk outflows are an important part of the quasar phenomenon. They might play a major role in distributing metals to the galactic surroundings, halting growth of the central black hole and providing kinetic energy "feedback" to regulate star formation in the host galaxies. Some models of galaxy evolution indicate that feedback requires kinetic energy luminosities, LK, that are ∼5% of the quasar bolometric; L K/L = Mwv2/2ηMaccc ∼ 5% is possible if Mw ∼ Macc (with v ∼ 0.1c, and η ∼ 0.1). Here we describe results from two studies designed to test the theoretical energetics of radiatively driven outflows and derive observational constraints on the outflow geometry and physical properties emphasizing weaker outflow features like NALs and mini-BALs.

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KW - Line: formation

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KW - Quasars: general

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New results on quasar outflows

Abstract

Keywords

UN SDGs

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