Matches in SemOpenAlex for { <https://semopenalex.org/work/W2999461119> ?p ?o ?g. }
- W2999461119 endingPage "5560" @default.
- W2999461119 startingPage "5540" @default.
- W2999461119 abstract "The origin, geometry and kinematics of the broad line region (BLR) gas in quasars and active galactic nuclei (AGN) are uncertain. We demonstrate that clumpy biconical disc winds illuminated by an AGN continuum can produce BLR-like spectra. We first use a simple toy model to illustrate that disc winds make quite good BLR candidates, because they are self-shielded flows and can cover a large portion of the ionizing flux-density ($phi_H$-$n_H$) plane. We then conduct Monte Carlo radiative transfer and photoionization calculations, which fully account for self-shielding and multiple scattering in a non-spherical geometry. The emergent model spectra show broad emission lines with equivalent widths and line ratios comparable to those observed in AGN, provided that the wind has a volume filling factor of $f_Vlesssim0.1$. Similar emission line spectra are produced for a variety of wind geometries (polar or equatorial) and for launch radii that differ by an order of magnitude. The line emission arises almost exclusively from plasma travelling below the escape velocity, implying that `failed winds' are important BLR candidates. The behaviour of a line-emitting wind (and possibly any `smooth flow' BLR model) is similar to that of the locally optimally-emitting cloud (LOC) model originally proposed by Baldwin et al (1995), except that the gradients in ionization state and temperature are large-scale and continuous, rather than within or between distinct clouds. Our models also produce UV absorption lines and X-ray absorption features, and the stratified ionization structure can partially explain the different classes of broad absorption line quasars." @default.
- W2999461119 created "2020-01-23" @default.
- W2999461119 creator A5003311827 @default.
- W2999461119 creator A5015115726 @default.
- W2999461119 creator A5019898838 @default.
- W2999461119 creator A5060060383 @default.
- W2999461119 creator A5063041634 @default.
- W2999461119 creator A5077406243 @default.
- W2999461119 creator A5085953495 @default.
- W2999461119 creator A5086573499 @default.
- W2999461119 date "2020-01-16" @default.
- W2999461119 modified "2023-10-17" @default.
- W2999461119 title "Stratified disc wind models for the AGN broad-line region: ultraviolet, optical, and X-ray properties" @default.
- W2999461119 cites W1754170060 @default.
- W2999461119 cites W1822769209 @default.
- W2999461119 cites W1861812582 @default.
- W2999461119 cites W1885859652 @default.
- W2999461119 cites W1894473559 @default.
- W2999461119 cites W1903143025 @default.
- W2999461119 cites W1965290708 @default.
- W2999461119 cites W1967407002 @default.
- W2999461119 cites W1967491597 @default.
- W2999461119 cites W1969359414 @default.
- W2999461119 cites W1974506094 @default.
- W2999461119 cites W1975203849 @default.
- W2999461119 cites W1975682186 @default.
- W2999461119 cites W1977319758 @default.
- W2999461119 cites W1977604962 @default.
- W2999461119 cites W1978687171 @default.
- W2999461119 cites W1979115990 @default.
- W2999461119 cites W1985435950 @default.
- W2999461119 cites W1986287522 @default.
- W2999461119 cites W1986644900 @default.
- W2999461119 cites W1988116512 @default.
- W2999461119 cites W1989432205 @default.
- W2999461119 cites W1990905945 @default.
- W2999461119 cites W1991074096 @default.
- W2999461119 cites W1991127397 @default.
- W2999461119 cites W1993785188 @default.
- W2999461119 cites W1996513259 @default.
- W2999461119 cites W1998759148 @default.
- W2999461119 cites W2000307147 @default.
- W2999461119 cites W2001298730 @default.
- W2999461119 cites W2002390449 @default.
- W2999461119 cites W2003001642 @default.
- W2999461119 cites W2003630083 @default.
- W2999461119 cites W2004637251 @default.
- W2999461119 cites W2005334789 @default.
- W2999461119 cites W2005583838 @default.
- W2999461119 cites W2006090325 @default.
- W2999461119 cites W2006675209 @default.
- W2999461119 cites W2007059126 @default.
- W2999461119 cites W2008405179 @default.
- W2999461119 cites W2011297915 @default.
- W2999461119 cites W2011301426 @default.
- W2999461119 cites W2014587021 @default.
- W2999461119 cites W2016044971 @default.
- W2999461119 cites W2016398940 @default.
- W2999461119 cites W2016444127 @default.
- W2999461119 cites W2016662888 @default.
- W2999461119 cites W2017220219 @default.
- W2999461119 cites W2021036743 @default.
- W2999461119 cites W2021397202 @default.
- W2999461119 cites W2021871380 @default.
- W2999461119 cites W2022472230 @default.
- W2999461119 cites W2023106241 @default.
- W2999461119 cites W2027058913 @default.
- W2999461119 cites W2027581992 @default.
- W2999461119 cites W2027901034 @default.
- W2999461119 cites W2030114922 @default.
- W2999461119 cites W2036066086 @default.
- W2999461119 cites W2036259292 @default.
- W2999461119 cites W2036437339 @default.
- W2999461119 cites W2038207393 @default.
- W2999461119 cites W2038964100 @default.
- W2999461119 cites W2039207477 @default.
- W2999461119 cites W2039449237 @default.
- W2999461119 cites W2039777668 @default.
- W2999461119 cites W2041178612 @default.
- W2999461119 cites W2041431067 @default.
- W2999461119 cites W2042598102 @default.
- W2999461119 cites W2042674528 @default.
- W2999461119 cites W2043459207 @default.
- W2999461119 cites W2046222099 @default.
- W2999461119 cites W2046618793 @default.
- W2999461119 cites W2047940588 @default.
- W2999461119 cites W2057691783 @default.
- W2999461119 cites W2059705234 @default.
- W2999461119 cites W2064257203 @default.
- W2999461119 cites W2064260800 @default.
- W2999461119 cites W2064479312 @default.
- W2999461119 cites W2066385539 @default.
- W2999461119 cites W2066744800 @default.
- W2999461119 cites W2067698390 @default.
- W2999461119 cites W2069434400 @default.
- W2999461119 cites W2071575373 @default.
- W2999461119 cites W2072334518 @default.
- W2999461119 cites W2073838033 @default.