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J/AJ/121/318 BV photometry in NGC 5986 (Alves+, 2001)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
table1.dat table2.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/AJ/121/318
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Beginning of ReadMe :J/AJ/121/318 BV photometry in NGC 5986 (Alves+, 2001)
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CCD photometry of the globular cluster NGC 5986 and its post-asymptotic giant
branch and RR Lyrae stars.
Alves D.R., Bond H.E., Onken C.
<Astron. J. 121, 318 (2001)>
=2001AJ....121..318A
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ADC_Keywords: Clusters, globular ; Photometry, CCD ; Photometry, UBV
Keywords: color-magnitude diagrams - globular clusters: individual (NGC 5986) -
RR Lyrae variable - stars: AGB and post-AGB
Abstract:
We have obtained new CCD BV photometry of the little-studied southern
Galactic globular cluster NGC 5986, including light curves of five of
its RR Lyrae variables. The cluster's red giant branch bump is
detected for the first time, at V=16.47 +/-0.03. We derive a reddening
and true distance modulus of E(B-V)=0.29+/-0.02 and
(m-M)_0_=15.15+/-0.10, respectively. The cluster's color-magnitude
diagram reveals a mostly blue horizontal branch, like that of M13 or
M2, and quite unlike M3; yet all of these clusters have nearly
identical metallicities ([Fe/H]_CG97_=-1.35). We show that the RR
Lyrae variables in NGC 5986 are about 0.2mag brighter on average than
those in M3, an important exception to the often-employed, universal
M_V_(RR)-[Fe/H] relation. Finally, we note that NGC 5986 contains two
luminous stars with spectral types A-F, which are likely to be
post-asymptotic giant branch (PAGB) objects. The V-band luminosity
function of such yellow PAGB stars is a promising standard candle. We
suggest that the luminosity function is sharply peaked at
M_V_(PAGB)=-3.28+/-0.07.