University of Hertfordshire

From the same journal

From the same journal

By the same authors

Long-term Stellar Variability in the Galactic Centre Region

Research output: Contribution to journalArticle

Documents

  • 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
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Journal publication date6 Nov 2018
Publication statusAccepted/In press - 6 Nov 2018

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

Resubmitted to MNRAS after a positive referee report, 21 pages, 23 figures and 3 tables

ID: 15670920