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ALMA Observations of the IRDC Clump G34.43+00.24 MM3: 278 GHz Class I Methanol Masers
Takahiro Yanagida, Takeshi Sakai, Tomoya Hirota +7
We have observed a molecular clump (MM3) associated with the infrared dark cloud G34.43+00.24 in the CH3OH J_K=9_{-1}--8_0 E, 5_0-4_0 E, and 5_{-1}-4_{-1} E lines at sub-arcsecond…
A Substellar-Mass Protostar and its Outflow of IRAS 15398-3359 Revealed by Subarcsecond-Resolution Observations of HCO and CCH
Yoko Oya, Nami Sakai, Takeshi Sakai +7
Sub-arcsecond () images of HCO and CCH line emission have been obtained in the mm band toward the low-mass protostar IRAS 15398-3359 in the Lupus 1 cl…
Observations of the Bursting Activity of the 6.7GHz Methanol Maser in G33.641-0.228
Kenta Fujisawa, Nozomu Aoki, Yoshito Nagadomi +8
We have observed bursting variability of the 6.7 GHz methanol maser of G33.641-0.228. Five bursts were detected in the observation period of 294 days from 2009 to 2012. The typical…
VERA and ALMA Observations of the H2O Supermaser Burst in Orion KL
Tomoya Hirota, Masato Tsuboi, Yasutaka Kurono +5
The 22 GHz H2O maser in Orion KL has shown extraordinary burst events in 1979-1985 and 1998-1999, sometimes called supermaser. We have conducted monitoring observations of the supe…
Cluster Formation Triggered by Filament Collisions in Serpens South
Fumitaka Nakamura, Koji Sugitani, Tomohiro Tanaka +24
The Serpens South infrared dark cloud consists of several filamentary ridges, some of which fragment into dense clumps. On the basis of CCS (), HCN (), N$_2…
VLBI observations of bright AGN jets with KVN and VERA Array (KaVA): Evaluation of Imaging Capability
Kotaro Niinuma, Sang-Sung Lee, Motoki Kino +69
The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to hi…