2019A&A...631A..20N


Query : 2019A&A...631A..20N

2019A&A...631A..20N - Astronomy and Astrophysics, volume 631A, 20-20 (2019/11-1)

GALACTICNUCLEUS: A high-angular-resolution JHKs imaging survey of the Galactic centre. II. First data release of the catalogue and the most detailed CMDs of the GC.

NOGUERAS-LARA F., SCHODEL R., GALLEGO-CALVENTE A.T., DONG H., GALLEGO-CANO E., SHAHZAMANIAN B., GIRARD J.H.V., NISHIYAMA S., NAJARRO F. and NEUMAYER N.

Abstract (from CDS):


Context. The high extinction and extreme source crowding of the central regions of the Milky Way are serious obstacles to the study of the structure and stellar population of the Galactic centre (GC). Existing surveys that cover the GC region (2MASS, UKIDSS, VVV, SIRIUS) do not have the necessary high angular resolution. Therefore, a high-angular-resolution survey in the near infrared is crucial to improve the state of the art.
Aims. Here, we present the GALACTICNUCLEUS catalogue, a near infrared JHKs high-angular-resolution (0.2'') survey of the nuclear bulge of the Milky Way.
Methods. We explain in detail the data reduction, data analysis, calibration, and uncertainty estimation of the GALACTICNUCLEUS survey. We assess the data quality comparing our results with previous surveys.
Results. We obtained accurate JHKs photometry for ∼3.3x106 stars in the GC detecting around 20% in J, 65% in H, and 90% in Ks. The survey covers a total area of ∼0.3deg2, which corresponds to ∼6000pc2. The GALACTICNUCLEUS survey reaches 5σ detections for J∼22mag, H∼21mag, and Ks∼21mag. The uncertainties are below 0.05mag at J∼21mag, H∼19mag, and Ks∼18mag. The zero point systematic uncertainty is ≤0.04mag in all three bands. We present colour-magnitude diagrams for the different regions covered by the survey.

Abstract Copyright: © ESO 2019

Journal keyword(s): Galaxy: center - Galaxy: bulge - Galaxy: structure - stars: horizontal-branch - dust - extinction

VizieR on-line data: <Available at CDS (J/A+A/631/A20): central.dat nsdeast.dat nsdwest.dat teast.dat twest.dat ibnorth.dat ibsouth.dat>

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12558 1
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14210 0
3 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4324 3
4 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 726 0
5 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 517 0
6 NAME Galactic Bulge reg ~ ~           ~ 4252 0

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