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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…
Distributed Low-Mass Star Formation in the IRDC G34.43+00.24
Jonathan B. Foster, Héctor G. Arce, Marc Kassis +9
We have used deep near-infrared observations with adaptive optics to discover a distributed population of low-mass protostars within the filamentary Infrared Dark Cloud G34.43+00.2…
Spectral Line Survey toward Spiral Arm of M51 in the 3 mm and 2 mm Bands
Yoshimasa Watanabe, Nami Sakai, Kazuo Sorai +1
We have conducted a spectral line survey in the 3 mm and 2 mm bands toward two positions in a spiral arm of M51 (NGC 5194) with the IRAM 30 m telescope. In this survey, we have ide…
DNC/HNC and N2D+/N2H+ ratios in high-mass star forming cores
F. Fontani, T. Sakai, K. Furuya +3
Chemical models predict that the deuterated fraction (the column density ratio between a molecule containing D and its counterpart containing H) of N2H+, Dfrac(N2H+), is high in ma…