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Large-amplitude variables near the Galactic Centre |
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| Authors: | I S Glass S Matsumoto B S Carter K Sekiguchi |
| Institution: | South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa;Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181, Japan;Carter Observatory, PO Box 2909, Wellington, New Zealand;Subaru Telescope, NAOJ, 650 North A'ohoku Place, Hilo, HI 96720, USA |
| Abstract: | We report here the results of a 4-yr K -band (2.2 μm) survey for large-amplitude variable stars in a The limits of completeness arising from interstellar and circumstellar absorption are discussed. Most of the area suffers interstellar extinction of Almost all of the LPVs are Miras or OH/IR stars, with periods ranging from 150 d to about 800 d. K -band counterparts have been found for 59 per cent of the 109 known OH sources in the field. The average period of the variables found is 427 d, while that of the OH/IR stars is 524 d. For comparison, the average period in the Sgr I window, which contains no known OH/IR stars, is 333 d and only two stars are detected with |
| Keywords: | surveys stars: AGB and post-AGB stars: variables: other Galaxy: centre |