SIMBAD references

2017MNRAS.470.3427D - Mon. Not. R. Astron. Soc., 470, 3427-3452 (2017/September-3)

Near-infrared variability study of the central 2.3 arcmin x 2.3 arcmin of the Galactic Centre - I. Catalogue of variable sources.

DONG H., SCHODEL R., WILLIAMS B.F., NOGUERAS-LARA F., GALLEGO-CANO E., GALLEGO-CALVENTE T., WANG Q.D., MORRIS M.R., DO T. and GHEZ A.

Abstract (from CDS):

We used 4-yr baseline Hubble Space Telescope/Wide Field Camera 3 IR observations of the Galactic Centre in the F153M band (1.53 µm) to identify variable stars in the central ∼2.3 arcmin x 2.3 arcmin field. We classified 3845 long-term (periods from months to years) and 76 short-term (periods of a few days or less) variables among a total sample of 33 070 stars. For 36 of the latter ones, we also derived their periods (<3 d). Our cataloguenot only confirms bright long period variables and massive eclipsing binaries identified in previous works but also contains many newly recognized dim variable stars. For example, we found δ Scuti and RR Lyrae stars towards the Galactic Centre for the first time, as well as one BL Her star (period < 1.3 d). We cross-correlated our cataloguewith previous spectroscopic studies and found that 319 variables have well-defined stellar types, such as Wolf-Rayet, OB main sequence, supergiants and asymptotic giant branch stars. We used colours and magnitudes to infer the probable variable types for those stars without accurately measured periods or spectroscopic information. We conclude that the majority of unclassified variables could potentially be eclipsing/ellipsoidal binaries and Type II Cepheids. Our source catalogue will be valuable for future studies aimed at constraining the distance, star formation history and massive binary fraction of the Milky Way nuclear star cluster.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: variables: general - Galaxy: centre - infrared: stars - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/470/3427): table3.dat table4.dat table8.dat table9.dat>

Nomenclature: [DSW2017] NNNNN (Nos 1-33070).

Status in Simbad:  will not be processed

Simbad objects: 25

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2020.01.29-10:31:54

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