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J/MNRAS/458/4162    Stromgren photometry of M3 (NGC5272)        (Massari+, 2016)

Multiple stellar populations in the globular cluster M3 (NGC 5272): a Stromgren perspective. Massari D., Lapenna E., Bragaglia A., Dalessandro E., Contreras Ramos R., Amigo P. <Mon. Not. R. Astron. Soc., 458, 4162-4171 (2016)> =2016MNRAS.458.4162M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Photometry, uvby Keywords: techniques: photometric - stars: abundances - Hertzsprung-Russell and colour-magnitude diagrams - stars: Population II - globular clusters: general - globular clusters: individual: ngc5272 Abstract: We present Stroemgren photometry of the Galactic Globular Cluster M3 to study its multiple generations phenomenon. The use of different colour-magnitude diagrams (CMDs) and especially of the notoriously efficient cy index allowed us to detect a double red giant branch in the cluster CMD. After decontamination from fore- and background sources, the two sequences turned out to be equally populated. The two components also show a bimodal radial distribution well corresponding to that predicted by numerical simulations for clusters living in an intermediate dynamical evolutive state and with a population with modified chemical composition that was born more centrally concentrated than the primordial. The analysis of high-resolution spectra quantitatively demonstrates that the two detected sequences correspond to the first (Na-poor) generation and the second (Na-rich) generation, thus confirming the importance of synergy between photometry and spectroscopy. Description: Calibrated Stromgren photometry for the Galactic globular cluster M3 (NGC5272) in uvbi filters. Data observed with the Wide Field Camera at the Isaac Newton Telecope. Positions registered onto the 2MASS astrometric File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 92 17150 Stellar positions and magnitudes
See also: I/278 : Catalog of stars in M3 (von Zeipel, 1908) J/A+A/290/69 : M3 photographic photometry (Buonanno+, 1994) J/PAZh/20/693 : Identification & coordinates in NGC 5272 (Evstigneeva+ 1994) J/AJ/108/1786 : M3 blue stragglers and variable stars (Guhathakurta+, 1994) J/A+A/320/757 : M3 stars CCD photometry (Ferraro+ 1997) J/A+A/324/915 : Blue stragglers in M3 (Ferraro+ 1997) J/AJ/120/1364 : Abundances in M3 and M13 (Cavallo+, 2000) J/AJ/122/3219 : M3 and M13 CCD BV photometry (Rey+, 2001) J/AJ/129/267 : RR Lyrae variables in NGC 5272 (Cacciari+, 2005) J/AJ/129/303 : Abundances of stars in M3 and M13 (Cohen+, 2005) J/AJ/129/1596 : BVI photometric variability survey of M3 (Hartman+, 2005) J/MNRAS/372/1657 : BVI(c) light curves of variables in M3 (Benko+, 2006) J/AJ/139/2300 : BVIc light curves of 3 type II Cepheids (Rabidoux+, 2010) J/MNRAS/419/2173 : Long-term photometry of M3 RR Lyrae (Jursik+, 2012) J/A+A/566/A58 : Radial velocities in M3, M13, and M92 (Kamann+, 2014) J/AJ/150/129 : Swift UVOT stars survey. RR Lyrae in M3 & M15 (Siegel+ 2015) J/ApJS/219/25 : Light curves of RR Lyrae stars in M3 (Jurcsik+, 2015) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 5 I5 --- ID ID number 7- 17 F11.7 deg RAdeg Right ascension (J2000.0) 19- 29 F11.7 deg DEdeg Declination (J2000.0) 31- 36 F6.3 mag umag ?=99.999 Stroemgren u magnitude 38- 43 F6.3 mag e_umag ?=10.000 u-mag uncertainty 45- 50 F6.3 mag vmag ?=99.999 Stroemgren v magnitude 52- 57 F6.3 mag e_vmag ?=10.000 v-mag uncertainty 59- 64 F6.3 mag bmag ?=99.999 Stroemgren b magnitude 66- 71 F6.3 mag e_bmag ?=10.000 b-mag uncertainty 73- 78 F6.3 mag ymag ?=99.999 Stroemgren y magnitude 80- 85 F6.3 mag e_ymag ?=10.000 y-mag uncertainty 87- 92 F6.3 --- sh Sharpness
Acknowledgements: Davide Massari, davide.massari(at)oabo.inaf.it
(End) Davide Massari [INAF-Bologna, Italy], Patricia Vannier [CDS] 13-Jul-2018
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