Quasar outflow energetics from broad absorption line variability

Autor: Joseph C. Shields, H. Herbst, Fred Hamann, Sean McGraw, Daniel M. Capellupo

Publikováno v: Monthly Notices of the Royal Astronomical Society. 475:585-600

Quasar outflows have long been recognized as potential contributors to the co-evolution between supermassive black holes (SMBHs) and their host galaxies. The role of outflows in AGN feedback processes can be better understood by placing observational

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e018f89c6fb2cd221d2ee7f64c42fd56
https://doi.org/10.1093/mnras/stx3219

On the structure and energetics of quasar broad absorption-line outflows

Autor: I. Paris, Fred Hamann, H. Herbst, Daniel M. Capellupo

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2019, 483, pp.1808-1828. ⟨10.1093/mnras/sty2900⟩

Quasar accretion-disk outflows might play an important role in galaxy evolution, but they are notoriously difficult to study due to line saturation and blending problems in the Ly-alpha forest. We circumvent these problems by constructing median comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be35147d741ee0eb821de6a69e904a40

Constraining FeLoBAL outflows from absorption line variability

Autor: S. C. Gallagher, Joseph C. Shields, Daniel M. Capellupo, S. M. McGraw, Fred Hamann, W. N. Brandt

Publikováno v: Physics and Astronomy Publications

FeLoBALs are a rare class of quasar outflows with low-ionization broad absorption lines (BALs), large column densities, and potentially large kinetic energies that might be important for `feedback' to galaxy evolution. In order to probe the physical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16d4235d9e2ec3aee19ec41409eb8d8d
https://doi.org/10.1093/mnras/stv1697

Simultaneous Monitoring of X-Ray and Radio Variability in Sagittarius A*

Autor: Geoffrey C. Bower, Nathalie Degenaar, Daryl Haggard, Daniel M. Capellupo, Heino Falcke, Sera Markoff, Nanda Rea, Nicolas Choux, Frederick K. Baganoff, Craig O. Heinke, Jason Dexter, P. Chris Fragile, Bill Cotton, Farhad Yusef-Zadeh, Casey J. Law, Gabriele Ponti, J. Neilsen

Publikováno v: The Astrophysical Journal, 845, 1-13
Astrophysical Journal, 845(1):35. IOP Publishing Ltd.
The Astrophysical Journal, 845, 1, pp. 1-13

Monitoring of Sagittarius A* from X-ray to radio wavelengths has revealed structured variability --- including X-ray flares --- but it is challenging to establish correlations between them. Most studies have focused on variability in the X-ray and in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::939492994b017ca08c7f71ba056a6de7
https://hdl.handle.net/11245.1/131996f4-4f7b-446e-8dd7-e82c7a6bc23b

Quasars with PV broad absorption in BOSS data release 9

Autor: Donald G. York, Fred Hamann, Isabelle Pâris, Alina Streblyanska, H. Herbst, Donald P. Schneider, Daniel M. Capellupo, Jian Ge, W. N. Brandt, Patrick Petitjean

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2017, 469 (1), pp.323-338. ⟨10.1093/mnras/stx870⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 469 (1), pp.323-338. ⟨10.1093/mnras/stx870⟩

Broad absorption lines (BALs) found in a significant fraction of quasar spectra identify high-velocity outflows that might be present in all quasars and could be a major factor in feedback to galaxy evolution. Understanding the nature of these flows

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83210d995e87abb42ec776fa5829569d