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Miras around the Galactic Center
Noriyuki Matsunaga, IRSF/SIRIUS team
We report results of our near-IR survey for variables in a field of view of 20 arcmin by 30 arcmin towards the Galactic Center (GC), where we detected 1364 long-period variables. W…
A near-infrared survey of Miras and the distance to the Galactic Centre
Noriyuki Matsunaga, Takahiro Kawadu, Shogo Nishiyama +5
We report the results of a near-infrared survey for long-period variables in a field of view of 20 arcmin by 30 arcmin towards the Galactic Centre (GC). We have detected 1364 varia…
3-D Dynamics of Interactions between Stellar Winds and the Interstellar Medium as Seen by AKARI and Spitzer
Toshiya Ueta, Hideyuki Izumiura, Issei Yamamura +9
Recent far-infrared mapping of mass-losing stars by the AKARI Infrared Astronomy Satellite and Spitzer Space Telescope have suggested that far-infrared bow shock structures are pro…
Mass Loss History of the AGB star, R Cas
Toshiya Ueta, Robert E. Stencel, Issei Yamamura +9
We report here on the discovery of an extended far-infrared shell around the AGB star, R Cassiopeia, made by AKARI and Spitzer. The extended, cold circumstellar shell of R Cas span…
Period-Luminosity Relations for Type II Cepheids and their Application
Noriyuki Matsunaga, Michael W. Feast, John W. Menzies
JHKs magnitudes corrected to mean intensity are estimated for LMC type II Cepheids in the OGLE-III survey. Period-luminosity (PL) relations are derived in JHKs as well as in a redd…