Title: 1.1 mm AzTEC on ASTE survey of disk sources in Lupus and
Chamaelen low-mass star forming regions

Author(s): T. Tsukagoshi, M. Saito, M. Momose, Y. Kitamura, G.
Wilson, M. Yun, D. Hughes, K. Kohno, H. Ezawa, & R. Kawabe

Abstract:
We present a 1.1 mm wavelength imaging survey covering 16 deg^2
(roughly 200 pc^2 ) toward the southern nearby star forming regions,
Chmaeleon I, II, & III and Lupus I, II, III, & IV (d = 150-180 pc).
The survey was performed as one of AzTEC on ASTE key projects for the
systematic search of dust cores and protoplanetary disks. These data
were obtained in the years of 2007 and 2008 with the AzTEC continuum
camera on ASTE 10m sub-millimeter telescope in Chile, and the
sensitivity was 10 mJy/beam in average (3 sigma mass for the disk
sources is about a Jupiter mass). The survey speed for detecting unit
dust mass 10 times (or more) higher than SCUBA on JCMT was achieved.
We spend roughly 100 hours for the on-source integration, and detected
more than 200 starless cores, 10 Class0/I sources, and 30 Class II/III
sources. A half of the 30 ClassII/III sources is new detection. We
also performed CO(3-2) and 13CO(3-2) five point observations with ASTE
for 36 Class II/III sources with strong 1.1 mm/1.3 mm emission in the
two regions and in Taurus/Oph regions. From our data, we found
evidence for that there are a few large gaseous disk candidates in
each of Lup, Cha, and Oph regions. We also report on the approach to
the statistical detection of 1.1 mm emission for 50 non-detection
ClassII sources and 200 non-detection ClassIII sources with stacking
analysis.