publication . Other literature type . Article . Preprint . 2017

Multiple Stellar Populations of Globular Clusters from Homogeneous Ca -CN Photometry. II. M5 (NGC 5904) and a New Filter System

Jae-Woo Lee;
Open Access
  • Published: 24 Jun 2017
  • Publisher: American Astronomical Society
Abstract
Using our ingeniously designed new filter systems, we investigate the multiple stellar populations of the RGB and AGB in the GC M5. Our results are the following. (1) Our cn_jwl index accurately traces the nitrogen abundances in M5, while other color indices fail to do so. (2) We find bimodal CN distributions both in the RGB and the AGB sequences, with the number ratios between the CN-weak (CN-w) and the CN-strong (CN-s) of n(CN-w):n(CN-s) = 29:71(+/- 2) and 21:79(+/- 7), respectively. (3) We also find the bimodal photometric [N/Fe] distribution for M5 RGB stars. (4) Our cn_jwl-[O/Fe] and cn_jwl-[Na/Fe] relations show the clear discontinuities between the two RG...
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Subjects
free text keywords: Space and Planetary Science, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics, Stars, Astrophysics, Classification of discontinuities, Physics, RGB color model, Photometry (optics), Truncation, Globular cluster, Population, education.field_of_study, education, Helium, chemistry.chemical_element, chemistry

4.2.2. A comparison with Smith, Modi, & Harmen (2013)

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