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Low-metallicity Young Clusters in the Outer Galaxy I. Sh 2-207
Chikako Yasui, Naoto Kobayashi, Alan T. Tokunaga +2
To study star formation in low metallicity environments ([M/H] ~ -1 ,dex), we obtained deep near-infrared (NIR) images of Sh 2-207 (S207), which is an HII region in the outer Galax…
Implication of Formation Mechanisms of HC5N in TMC-1 as Studied by 13C Isotopic Fractionation
Kotomi Taniguchi, Hiroyuki Ozeki, Masao Saito +5
We observed the J = 9-8 and 16-15 rotational transitions of the normal species and five 13C isotopologues of HC5N to study its formation mechanisms toward the cyanopolyyne peak in…
Spectral-Line Survey at Millimeter and Submillimeter Wavelengths toward an Outflow-Shocked Region, OMC 2-FIR 4
Yoshito Shimajiri, Takeshi Sakai, Yoshimi Kitamura +9
We performed the first spectral-line survey at 82--106 GHz and 335--355 GHz toward the outflow-shocked region, OMC 2-FIR 4, the outflow driving source, FIR 3, and the northern outf…
Dispersing Envelope around the Keplerian Circumbinary Disk in L1551 NE and its Implications for the Binary Growth
Shigehisa Takakuwa, Kazuhiro Kiyokane, Kazuya Saigo +1
We performed mapping observations of the Class I protostellar binary system L1551 NE in the CO (=3-2), CO (=3-2), CS (=7-6), and SO (=7-6) lines…
ALMA Observations of the Transition from Infall Motion to Keplerian Rotation around the Late-phase Protostar TMC-1A
Yusuke Aso, Nagayoshi Ohashi, Kazuya Saigo +9
We have observed the Class I protostar TMC-1A with Atacama Millimeter/submillimeter Array (ALMA) in 12CO and C18O (J=2-1), and 1.3-mm dust continuum emission. Continuum emission wi…
First Detection of [C I] P-P Emission from a Protoplanetary Disk
Takashi Tsukagoshi, Munetake Momose, Masao Saito +3
We performed single point [C I] P-P and CO J=4-3 observations toward three T Tauri stars, DM Tau, LkCa 15, and TW Hya, using the Atacama Large Millimeter/submillime…