University of Hertfordshire

From the same journal

From the same journal

By the same authors

Long-term Stellar Variability in the Galactic Centre Region

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  • sty3041

    Final published version, 6.82 MB, PDF document

  • C. Navarro Molina
  • J. Borissova
  • M. Catelan
  • P. W. Lucas
  • N. Medina
  • C. Contreras Pena
  • R. Kurtev
  • D. Minniti
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Original languageEnglish
Article numbersty3041
Pages (from-to)5567–5586
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Volume482
Issue4
Early online date10 Nov 2018
DOIs
Publication statusPublished - Feb 2019

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.

Notes

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.

ID: 15670920