http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
KVN PHASE REFERENCING OBSERVATIONS OF THE VIRGO CLUSTER
TREMOU, EVANGELIA,JUNG, TAEHYUN,CHUNG, AEREE,SOHN, BONG WON The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
By probing nuclear regions and the overall properties of AGN hosts as a function of their environments, we aim to observationally examine how AGN activities are related to their surroundings. We have selected a representative sample of AGN hosts in the Virgo cluster. The selected galaxies are located in a range of density regions showing various morphologies in 1.4 GHz continuum emission. High-resolution observations with the Korean VLBI Network (KVN) allow us to access the inner region of the AGN without suffering from dust extinction and synchrotron self-absorption. Since a number of our targets are too weak to be detected at K-band (22 GHz) within their coherence time, we applied phase referencing to calibrate fast atmospheric phase fluctuations.
Ionized-gas Kinematics Along the Large-scale Radio Jets in Type-2 AGNs
Le, Huynh Anh N.,Woo, Jong-Hak,Son, Donghoon,Karouzos, Marios,Chung, Aeree,Jung, Taehyun,Tremou, Evangelia,Hwang, Narae,Park, Byeong-Gon American Astronomical Society 2017 The Astrophysical journal Vol.851 No.1
<P>To investigate the connection between radioactivity and active galactic nucleus (AGN) outflows, we present a study of ionized-gas kinematics based on an [O III] lambda 5007 emission line along the large-scale radio jet for six radio AGNs. These AGNs are selected based on the radioactivity (i.e., L-1.4 (GHz) >= 10(39.8) erg s(-1)) as well as optical emission-line properties as type-2 AGNs. Using the Red Channel Cross Dispersed Echellette Spectrograph at the Multiple Mirror Telescope, we investigate in detail the [[OIII]] and stellar kinematics. We spatially resolve and probe the central AGN-photoionization sizes, which is important in understanding the structures and evolutions of galaxies. We find that the typical central AGN-photoionization radius of our targets are in range of 0.9-1.6 kpc, consistent with the size-luminosity relation of [O III] in previous studies. We investigate the [O III] kinematics along the large-scale radio jets to test whether there is a link between gas outflows in the narrow-line region and extended radio-jet emissions. Contrary to our expectation, we find no evidence that the gas outflows are directly connected to the large-scale radio jets.</P>