Infrared Identification of SiO Maser Sources toward the Sgr B2 Molecular Cloud
S. Deguchi(1), S. Shiki(1,2), S. Matsumoto(2), B. W. Jiang(3,4), Y.Nakada(5), P. Wood(6)
(1) Nobeyama Radio Observatory, National Astronomical Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan
(2) Department of Astronomy, School of Science, The University of Tokyo, Bunkyo, Tokyo 113, Japan
(3) Department of Astronomical Science, The Graduate University for Advanced Studies, Nobeyama Radio Observatory, National Astronomical Observatory, Minamimaki, Minamisaku, Nagano 384-13, Japan
(4) Beijing Astronomical Observatory, Chinese Academy of Science,, Zhongguancum, Beijing 100080, China
(5) Kiso Observatory, Institute of Astronomy, Faculty of Science, University of Tokyo,, Mitake, Kiso, Nagano 397-01, Japan
(6) Mt. Stromlo and Siding Spring Observatories, Private Bag, Weston Creek PO, Canberra, ACT, Australia
Paper: Accepted by PASJ (Vol. 49, No. 5, 1997 in press)
Abstract:
J, H, and K imaging observations have been made in order
to identify infrared
counterparts for 6 new SiO maser sources toward the Sgr B2 molecular cloud.
Only two of these 6 new sources were previously identified with known objects
in other catalogues: one with an OH/IR
object, another with an IRAS point source. With the imaging observations,
we find infrared counterparts for four of the objects: #1, #2, #4, and #7.
These are late-type stars either nearby or near to the galactic
center. The remaining two sources of which we could not find counterparts
can be candidates of young stellar objects with SiO masers. However, it is
highly possible that these two are late-type stars located behind the
galactic-center
molecular cloud, suffering from very high dust extinction.
Preprints available from the authors at deguchi@nro.nao.ac.jp
,
or the raw TeX (no figures) if you click here.
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