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ID 34748
file
creator
Bae, Hyun-Jin
Woo, Jong-Hak
Yagi, Masafumi
Yoon, Suk-Jin
subject
galaxies: active
galaxies: kinematics and dynamics
NDC
Astronomy. Space sciences
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 beta, [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.
journal title
Astrophysical Journal
volume
Volume 753
issue
Issue 1
start page
10
date of issued
2012
publisher
IOP Publishing Ltd
issn
0004-637X
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
(c) 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
relation url
department
Hiroshima Astrophysical Science Center