Matches in SemOpenAlex for { <https://semopenalex.org/work/W2016287461> ?p ?o ?g. }
- W2016287461 endingPage "759" @default.
- W2016287461 startingPage "749" @default.
- W2016287461 abstract "The relatively nearby (distance=24.1 Mpc) elliptical galaxy NGC821 hosts an extreme example of a quiescent central massive black hole, for which deep Chandra observations revealed a nuclear source for the first time (with L(2-10 keV)/L_Edd ~ 3.6X10^{-8}). We present here a multiwavelength study of this nucleus, including VLA observations that detect a radio counterpart to the Chandra nuclear source at 1.4 GHz, with a flux density of 127 $mu$m and possibly a flat spectral shape; we also consider new Spitzer IRAC observations and archival HST images. With these data we discuss possible scenarios for the accretion modalities of the sole material that is available for fuelling, i.e., the stellar mass losses steadily replenishing the circumnuclear region. The final stages of accretion could be radiatively inefficient and coupled to a compact nuclear jet/outfow. The stellar mass losses could instead end up in a standard disc only if a Compton-thick AGN is present. Two extended sources detected by Chandra close to the nucleus could be due to several unresolved knots in a jet. If a jet is present, though, its kinetic energy would be only a very small fraction of the energy associated with the rest mass of the material being accreted. Starformation close to the nucleus is not shown by the available data. Deeper NICMOS, radio and far-IR observations should further constrain the accretion process." @default.
- W2016287461 created "2016-06-24" @default.
- W2016287461 creator A5002705012 @default.
- W2016287461 creator A5002705377 @default.
- W2016287461 creator A5015092797 @default.
- W2016287461 creator A5017027631 @default.
- W2016287461 creator A5076031366 @default.
- W2016287461 creator A5078240406 @default.
- W2016287461 creator A5080029324 @default.
- W2016287461 creator A5091245996 @default.
- W2016287461 date "2007-10-01" @default.
- W2016287461 modified "2023-10-16" @default.
- W2016287461 title "A DeepChandra, Very Large Array, andSpitzerInfrared Array Camera Study of the Very Low Luminosity Nucleus of the Elliptical NGC 821" @default.
- W2016287461 cites W1490124049 @default.
- W2016287461 cites W1558297478 @default.
- W2016287461 cites W1607103504 @default.
- W2016287461 cites W1612318524 @default.
- W2016287461 cites W1967423369 @default.
- W2016287461 cites W1968646907 @default.
- W2016287461 cites W1970439842 @default.
- W2016287461 cites W1971210827 @default.
- W2016287461 cites W1977825268 @default.
- W2016287461 cites W1979670935 @default.
- W2016287461 cites W1982008022 @default.
- W2016287461 cites W1982657683 @default.
- W2016287461 cites W1982904752 @default.
- W2016287461 cites W1984375310 @default.
- W2016287461 cites W1994671833 @default.
- W2016287461 cites W2000246796 @default.
- W2016287461 cites W2003710193 @default.
- W2016287461 cites W2007542246 @default.
- W2016287461 cites W2010897480 @default.
- W2016287461 cites W2012733001 @default.
- W2016287461 cites W2013425636 @default.
- W2016287461 cites W2015495129 @default.
- W2016287461 cites W2016184603 @default.
- W2016287461 cites W2017762678 @default.
- W2016287461 cites W2018489450 @default.
- W2016287461 cites W2022146599 @default.
- W2016287461 cites W2027345944 @default.
- W2016287461 cites W2028042795 @default.
- W2016287461 cites W2030945938 @default.
- W2016287461 cites W2034751728 @default.
- W2016287461 cites W2035478725 @default.
- W2016287461 cites W2037895402 @default.
- W2016287461 cites W2039051320 @default.
- W2016287461 cites W2039100334 @default.
- W2016287461 cites W2042140670 @default.
- W2016287461 cites W2042285181 @default.
- W2016287461 cites W2042475886 @default.
- W2016287461 cites W2051475866 @default.
- W2016287461 cites W2052926897 @default.
- W2016287461 cites W2057023417 @default.
- W2016287461 cites W2070054216 @default.
- W2016287461 cites W2072876479 @default.
- W2016287461 cites W2073222257 @default.
- W2016287461 cites W2076532505 @default.
- W2016287461 cites W2079703253 @default.
- W2016287461 cites W2081520010 @default.
- W2016287461 cites W2081851528 @default.
- W2016287461 cites W2082437018 @default.
- W2016287461 cites W2087922734 @default.
- W2016287461 cites W2106633971 @default.
- W2016287461 cites W2111817932 @default.
- W2016287461 cites W2121500628 @default.
- W2016287461 cites W2128271156 @default.
- W2016287461 cites W2129737389 @default.
- W2016287461 cites W2129760210 @default.
- W2016287461 cites W2130592261 @default.
- W2016287461 cites W2131083929 @default.
- W2016287461 cites W2135894620 @default.
- W2016287461 cites W2147040512 @default.
- W2016287461 cites W2148804397 @default.
- W2016287461 cites W2148991125 @default.
- W2016287461 cites W2153783746 @default.
- W2016287461 cites W2154955582 @default.
- W2016287461 cites W2160574786 @default.
- W2016287461 cites W2162132003 @default.
- W2016287461 cites W2952622980 @default.
- W2016287461 cites W3098720345 @default.
- W2016287461 cites W3098975407 @default.
- W2016287461 cites W3099270657 @default.
- W2016287461 cites W3099408034 @default.
- W2016287461 cites W3099469848 @default.
- W2016287461 cites W3099471130 @default.
- W2016287461 cites W3099759745 @default.
- W2016287461 cites W3099931971 @default.
- W2016287461 cites W3100098924 @default.
- W2016287461 cites W3100280153 @default.
- W2016287461 cites W3100438587 @default.
- W2016287461 cites W3100679294 @default.
- W2016287461 cites W3100949598 @default.
- W2016287461 cites W3101051326 @default.
- W2016287461 cites W3101539587 @default.
- W2016287461 cites W3102216133 @default.
- W2016287461 cites W3103168822 @default.
- W2016287461 cites W3103235503 @default.
- W2016287461 cites W3103351603 @default.