|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Ionized gas outflows in infrared-bright dust-obscured galaxies selected with WISE and SDSS | | Yoshiki Toba
; Hyun-Jin Bae
; Tohru Nagao
; Jong-Hak Woo
; Wei-Hao Wang
; Alexander Y. Wagner
; Ai-Lei Sun
; Yu-Yen Chang
; | | Date: |
6 Oct 2017 | | Abstract: | We present the ionized gas properties of infrared (IR)-bright dust-obscured
galaxies (DOGs) that show an extreme optical/IR color, $(i - [22])_{
m AB} >
7.0$, selected with the Sloan Digital Sky Survey (SDSS) and Wide-field Infrared
Survey Explorer (WISE). For 36 IR-bright DOGs that show [OIII]$lambda$5007
emission in the SDSS spectra, we performed a detailed spectral analysis to
investigate their ionized gas properties. In particular, we measured the
velocity offset (the velocity with respect to the systemic velocity measured
from the stellar absorption lines) and the velocity dispersion of the [OIII]
line. We found that the derived velocity offset and dispersion of most
IR-bright DOGs are larger than those of Seyfert 2 galaxies (Sy2s) at $z < 0.3$,
meaning that the IR-bright DOGs show relatively strong outflows compared to
Sy2s. This can be explained by the difference of IR luminosity contributed from
active galactic nucleus, $L_{
m IR}$ (AGN), because we found that (i) $L_{
m
IR}$ (AGN) correlates with the velocity offset and dispersion of [OIII] and
(ii) our IR-bright DOGs sample has larger $L_{
m IR}$ (AGN) than Sy2s.
Nevertheless, the fact that about 75% IR-bright DOGs have a large ($>$ 300 km
s$^{-1}$) velocity dispersion, which is a larger fraction compared to other AGN
populations, suggests that IR-bright DOGs are good laboratories to investigate
AGN feedback. The velocity offset and dispersion of [OIII] and
[NeIII]$lambda$3869 are larger than those of [OII]$lambda$3727, which
indicates that the highly ionized gas tends to show more stronger outflows. | | Source: | arXiv, 1710.2525 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER