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

doi:10.1093/mnras/sty3041

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

Centre for Astrophysics Research (CAR)

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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.

Original language	English
Article number	sty3041
Pages (from-to)	5567–5586
Number of pages	22
Journal	Monthly Notices of the Royal Astronomical Society
Volume	482
Issue number	4
Early online date	10 Nov 2018
DOIs	https://doi.org/10.1093/mnras/sty3041
Publication status	Published - Feb 2019

Keywords

astro-ph.SR

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sty3041
© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
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title = "Long-term Stellar Variability in the Galactic Centre Region",

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. ",

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author = "Molina, {C. Navarro} and J. Borissova and M. Catelan and Lucas, {P. W.} and N. Medina and Pena, {C. Contreras} and R. Kurtev and D. Minniti",

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doi = "10.1093/mnras/sty3041",

language = "English",

volume = "482",

pages = "5567–5586",

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TY - JOUR

T1 - Long-term Stellar Variability in the Galactic Centre Region

AU - Molina, C. Navarro

AU - Borissova, J.

AU - Catelan, M.

AU - Lucas, P. W.

AU - Medina, N.

AU - Pena, C. Contreras

AU - Kurtev, R.

AU - Minniti, D.

PY - 2019/2

Y1 - 2019/2

N2 - 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.

AB - 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.

KW - astro-ph.SR

U2 - 10.1093/mnras/sty3041

DO - 10.1093/mnras/sty3041

M3 - Article

SN - 0035-8711

VL - 482

SP - 5567

EP - 5586

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

M1 - sty3041

ER -

Long-term Stellar Variability in the Galactic Centre Region

Abstract

Keywords

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