Matches in SemOpenAlex for { <https://semopenalex.org/work/W3102781446> ?p ?o ?g. }
- W3102781446 endingPage "134" @default.
- W3102781446 startingPage "134" @default.
- W3102781446 abstract "We present multiwavelength observations that trace more than 40 yr in the life of the active galactic nucleus (AGN) in Mrk 590, traditionally known as a classic Seyfert 1 galaxy. From spectra recently obtained from Hubble Space Telescope, Chandra, and the Large Binocular Telescope, we find that the activity in the nucleus of Mrk 590 has diminished so significantly that the continuum luminosity is a factor of 100 lower than the peak luminosity probed by our long-baseline observations. Furthermore, the broad emission lines, once prominent in the UV/optical spectrum, have all but disappeared. Since AGN type is defined by the presence of broad emission lines in the optical spectrum, our observations demonstrate that Mrk 590 has now become a changing-look AGN. If classified by recent optical spectra, Mrk 590 would be a Seyfert ∼1.9−2, where the only broad emission line still visible in the optical spectrum is a weak component of Hα. As an additional consequence of this change, we have definitively detected UV narrow-line components in a Type 1 AGN, allowing an analysis of these emission-line components with high-resolution COS spectra. These observations challenge the historical paradigm that AGN type is only a consequence of the line-of-sight viewing angle toward the nucleus in the presence of a geometrically flattened, obscuring medium (i.e., the torus). Our data instead suggest that the current state of Mrk 590 is a consequence of the change in luminosity, which implies the black hole accretion rate has significantly decreased." @default.
- W3102781446 created "2020-11-23" @default.
- W3102781446 creator A5007857570 @default.
- W3102781446 creator A5014347419 @default.
- W3102781446 creator A5019516607 @default.
- W3102781446 creator A5019527061 @default.
- W3102781446 creator A5034783890 @default.
- W3102781446 creator A5037202979 @default.
- W3102781446 creator A5043026151 @default.
- W3102781446 creator A5047273464 @default.
- W3102781446 creator A5054426401 @default.
- W3102781446 creator A5070407806 @default.
- W3102781446 creator A5083732858 @default.
- W3102781446 creator A5085232062 @default.
- W3102781446 date "2014-11-17" @default.
- W3102781446 modified "2023-10-13" @default.
- W3102781446 title "THE TYPECASTING OF ACTIVE GALACTIC NUCLEI: Mrk 590 NO LONGER FITS THE ROLE" @default.
- W3102781446 cites W1575405879 @default.
- W3102781446 cites W1592093302 @default.
- W3102781446 cites W1809954807 @default.
- W3102781446 cites W1858588464 @default.
- W3102781446 cites W1867387051 @default.
- W3102781446 cites W1967348346 @default.
- W3102781446 cites W1969283683 @default.
- W3102781446 cites W1974664809 @default.
- W3102781446 cites W1974840199 @default.
- W3102781446 cites W1979127418 @default.
- W3102781446 cites W1984383821 @default.
- W3102781446 cites W1990278395 @default.
- W3102781446 cites W1991788629 @default.
- W3102781446 cites W1994671833 @default.
- W3102781446 cites W1994700211 @default.
- W3102781446 cites W1994703407 @default.
- W3102781446 cites W1996291303 @default.
- W3102781446 cites W1997779216 @default.
- W3102781446 cites W2002695773 @default.
- W3102781446 cites W2009666550 @default.
- W3102781446 cites W2010941098 @default.
- W3102781446 cites W2016662888 @default.
- W3102781446 cites W2024235708 @default.
- W3102781446 cites W2024781889 @default.
- W3102781446 cites W2027581992 @default.
- W3102781446 cites W2028547171 @default.
- W3102781446 cites W2031652044 @default.
- W3102781446 cites W2033077658 @default.
- W3102781446 cites W2033762057 @default.
- W3102781446 cites W2038207393 @default.
- W3102781446 cites W2041216883 @default.
- W3102781446 cites W2042462496 @default.
- W3102781446 cites W2046222099 @default.
- W3102781446 cites W2048755753 @default.
- W3102781446 cites W2050776408 @default.
- W3102781446 cites W2051496938 @default.
- W3102781446 cites W2052926897 @default.
- W3102781446 cites W2054637721 @default.
- W3102781446 cites W2056937219 @default.
- W3102781446 cites W2059821514 @default.
- W3102781446 cites W2063699872 @default.
- W3102781446 cites W2077689701 @default.
- W3102781446 cites W2084721961 @default.
- W3102781446 cites W2086615899 @default.
- W3102781446 cites W2088326142 @default.
- W3102781446 cites W2090079989 @default.
- W3102781446 cites W2092894801 @default.
- W3102781446 cites W2092901033 @default.
- W3102781446 cites W2095654026 @default.
- W3102781446 cites W2124219338 @default.
- W3102781446 cites W2126353212 @default.
- W3102781446 cites W2134796923 @default.
- W3102781446 cites W2134953911 @default.
- W3102781446 cites W2136076204 @default.
- W3102781446 cites W2144397903 @default.
- W3102781446 cites W2151062050 @default.
- W3102781446 cites W2151684988 @default.
- W3102781446 cites W2157310373 @default.
- W3102781446 cites W2159413932 @default.
- W3102781446 cites W2168928771 @default.
- W3102781446 cites W2733445834 @default.
- W3102781446 cites W2991609270 @default.
- W3102781446 cites W3098402616 @default.
- W3102781446 cites W3098855090 @default.
- W3102781446 cites W3099484514 @default.
- W3102781446 cites W3100378700 @default.
- W3102781446 cites W3100991200 @default.
- W3102781446 cites W3101265163 @default.
- W3102781446 cites W3102107868 @default.
- W3102781446 cites W3102232058 @default.
- W3102781446 cites W3102307138 @default.
- W3102781446 cites W3102574376 @default.
- W3102781446 cites W3103072416 @default.
- W3102781446 cites W3103265536 @default.
- W3102781446 cites W3104453966 @default.
- W3102781446 cites W3105557468 @default.
- W3102781446 cites W3124690141 @default.
- W3102781446 cites W3125873736 @default.
- W3102781446 cites W3166943066 @default.
- W3102781446 cites W4240958145 @default.
- W3102781446 cites W4298577096 @default.