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Title:
Scientific role of ACA for low-mass star-formation study
Authors:
Takakuwa, Shigehisa; Iono, Daisuke; Vila-Vilaro, Baltasar; Sekiguchi, Tomohiko; Kawabe, Ryohei
Affiliation:
AA(ALMA Project Office, National Astronomical Observatory of Japan), AB(ALMA Project Office, National Astronomical Observatory of Japan), AC(ALMA Project Office, National Astronomical Observatory of Japan), AD(ALMA Project Office, National Astronomical Observatory of Japan), AE(ALMA Project Office, National Astronomical Observatory of Japan)
Publication:
Astrophysics and Space Science, Volume 313, Issue 1-3, pp. 169-173 (Ap&SS Homepage)
Publication Date:
01/2008
Origin:
SPRINGER
Keywords:
ACA, Imaging simulations, Low-mass star formation
Abstract Copyright:
(c) 2008: Springer Science+Business Media B.V.
DOI:
10.1007/s10509-007-9617-2
Bibliographic Code:
2008Ap&SS.313..169T

Abstract

We discuss the scientific role of the Atacama Compact Array (ACA), the Japanese contribution to the ALMA project, for low-mass star-formation study. Our recent observations of several low-mass protostellar envelopes in the submillimeter CS ( J=7 6) and HCN ( J=4 3) lines with the SMA and ASTE have revealed that these submillimeter emissions are more extended than ˜2000 AU and show different velocity structures from those traced by millimeter lines. These results suggest the importance of taking short-spacing informations the ACA can offer. Our comprehensive imaging simulations of these protostellar envelopes, as well as prestellar cores and debris disks, unprecedentedly demonstrate the scientific importance of ACA.
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