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26 April 2024 |
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A Keck/LRIS Spatially-Resolved Spectroscopic Study of a LINER Galaxy SDSS J091628.05+420818.7 | | Hyun-Jin Bae
; Jong-Hak Woo
; Masafumi Yagi
; Suk-Jin Yoon
; Michitoshi Yoshida
; | | Date: |
23 Apr 2012 | | Abstract: | Using spatially-resolved spectra obtained with the Low Resolution Imaging
Spectrometer at the Keck I telescope, we investigate the nature of ionizing
sources and kinematic properties of emission-line gas in a LINER galaxy SDSS
J091628.05+420818.7, which is a nearby (z = 0.0241) and bright (M_r = -20.2)
early-type galaxy. After subtracting stellar absorption features using a
combination of simple stellar population models, we measure the flux,
line-of-sight velocity, and velocity dispersion of four emission lines, i.e.,
H{alpha}, H{eta}, [O III] {lambda}5007, and [N II] {lambda}6584, to study
radial change of emission-line fluxes and velocities. Compared to the
point-spread-function of the observation, the emission-line region is slightly
extended but comparable to the seeing size. The central concentration of
emission-line gas suggests that ionization is triggered by a nuclear source,
excluding old stellar population as ionizing sources. We find that
emission-line gas is counter-rotating with respect to stellar component and
that the [O III] {lambda}5007 line is blueshifted compared to other emission
lines, possibly due to an outflow. | | Source: | arXiv, 1204.5178 | | Services: | Forum | Review | PDF | Favorites | |
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