Long-term Stellar Variability in the Galactic Centre Region

C. Navarro Molina, J. Borissova, M. Catelan, P. W. Lucas, N. Medina, C. Contreras Pena, R. Kurtev, D. Minniti

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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.
Original languageEnglish
Article numbersty3041
Pages (from-to)5567–5586
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Early online date10 Nov 2018
Publication statusPublished - Feb 2019


  • astro-ph.SR


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