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        Long-term Stellar Variability in the Galactic Centre Region

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        sty3041.pdf (PDF, 6Mb)
        Author
        Molina, C. Navarro
        Borissova, J.
        Catelan, M.
        Lucas, P. W.
        Medina, N.
        Pena, C. Contreras
        Kurtev, R.
        Minniti, D.
        Attention
        2299/22474
        Abstract
        We report the detection of variable stars within a 11.5' x 11.5' region near the Galactic centre (GC) that includes the Arches and Quintuplet clusters, as revealed by the VISTA Variables in the Via Lactea (VVV) survey. There are 353 sources that show Ks-band variability, of which the large majority (81%) correspond to red giant stars, mostly in the asymptotic giant branch (AGB) phase. We analyze a population of 52 red giants with long-term trends that cannot be classified into the typical pulsating star categories. Distances and extinctions are calculated for 9 Mira variables, and we discuss the impact of the chosen extinction law on the derived distances. We also report the presence of 48 new identified young stellar object (YSO) candidates in the region.
        Publication date
        2019-02
        Published in
        Monthly Notices of the Royal Astronomical Society
        Published version
        https://doi.org/10.1093/mnras/sty3041
        Other links
        http://hdl.handle.net/2299/22474
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