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26 April 2024 |
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Spatially Resolved Kinematics of gas and stars in hidden type 1 AGNs | | Donghoon Son
; Jong-Hak Woo
; Da-In Eun
; Hojin Cho
; Marios Karouzos
; Songyeon Park
; | | Date: |
Thu, 24 Sep 2020 05:51:08 GMT (11811kb,D) | | Abstract: | We present the spatially resolved gas and stellar kinematics of a sample of
ten hidden type 1 AGNs in order to investigate the true nature of the central
source and the scaling relation with host galaxy stellar velocity dispersion.
The sample is selected from a large number of hidden type 1 AGN, which are
identified based on the presence of a broad component in the ha line profile
(i.e., full-width-at-half-maximum $>$ $sim$1000 kms), while they are often
mis-classified as type 2 AGN because AGN continuum and broad emission lines are
weak or obscured in the optical spectral range. We used the Blue Channel
Spectrograph at the 6.5-m MMT (Multiple Mirror Telescope) to obtain long-slit
data. We detected a broad hb for only two targets, however, the presence of a
strong broad ha indicates that these AGNs are low-luminosity type 1 AGNs. We
measured the velocity, velocity dispersion and flux of stellar continuum and
gas emission lines (i.e., hb and oiii) as a function of distance from the
center with a spatial scale of 0.3 arcsec pixel$^{-1}$. Spatially resolved gas
kinematics traced by hb or oiii are generally similar to stellar kinematics
except for the very center, where signatures of gas outflows are detected. We
compare the luminosity-weighted effective stellar velocity dispersion with
black hole mass, finding that these hidden type 1 AGN with relatively low back
hole mass follow the scaling relation of the reverberation-mapped type 1 AGN
and more massive inactive galaxies. } | | Source: | arXiv, 2009.11498 | | Services: | Forum | Review | PDF | Favorites | |
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