2018AstBu..73..318S


Query : 2018AstBu..73..318S

2018AstBu..73..318S - Astrophys. Bull., 73, 318-334 (2018/August-0)

Age, Helium Content and Chemical Composition of Globular Clusters in the M31 Neighborhood and in our Galaxy.

SHARINA M.E., SHIMANSKY V.V. and KHAMIDULLINA D.A.

Abstract (from CDS):

We present the results of determinations of age, helium abundance ( Y), metallicity ([Fe/H]), and estimations of abundances of the elements: C, N, O, Mg, Ca, Ti, Cr, Ni, Sr, and Ba of four globular clusters in the neighborhood of the Andromeda galaxy ([SD2009]GC7,Mayall II, Mackey-GC1 (MGC1), and Bol 298 (MGC6)) and of six Galactic clusters. Medium-resolution long-slit integrated-light spectra from the clusters under study were used to determine the parameters. Observations of extra-galactic objects were carried out with the 6-m SAO RAS telescope using the SCORPIO-1 multimode focal reducer. Galactic globular clusters NGC6341 (M92), NGC6838 (M71), and NGC7078 were observed with the CARELEC spectrograph at the 1.93-m telescope of the Haute-Provence Observatory. The integratedlight spectra of Galactic globular clusters NGC104, NGC6121 (M4), and NGC7078 (M15) were taken from the spectral library by Schiavon.We selected the best isochrone for each cluster by comparison of the shapes and intensities of the observed and theoretical Balmer line profiles.

Abstract Copyright: ∼

Journal keyword(s): globular clusters - general - globular clusters - individual - Mayall II - MGC 1 - Bol 298 - [SD2009] GC7 - NGC104 - NGC6121 - NGC6838 - NGC7078?galaxies - M31

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NAME Mackey-GC1 GlC 00 26 47.7578536272 +39 44 46.082343084     16.05   15.07 ~ 21 1
3 NAME Mayall II GlC 00 32 46.5323801712 +39 34 40.504803060   14.564 13.807 13.208 12.684 ~ 400 1
4 Bol 298 GlC 00 38 00.2526652248 +40 43 56.002153404 17.380 17.231 16.590 16.032 15.470 ~ 43 0
5 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
6 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
7 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
8 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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