2014MNRAS.445.3839N


Query : 2014MNRAS.445.3839N

2014MNRAS.445.3839N - Mon. Not. R. Astron. Soc., 445, 3839-3847 (2014/December-3)

Red giant branch bump star counts in data and stellar models.

NATAF D.M.

Abstract (from CDS):

We compare model predictions to observations of star counts in the red giant branch bump (RGBB) relative to the number density of first-ascent red giant branch at the magnitude of the RGBB, EWRGBB. The predictions are shown to exceed the data by (5.2±4.3) percent for the BaSTI models and by (17.1±4.3) percent for the Dartmouth models, where the listed errors are purely statistical. These two offsets are brought to zero if the Galactic globular cluster metallicity scale is assumed to be overestimated by a linear shift of ∼ 0.11 and ∼ 0.36dex, respectively. This inference based on RGBB star counts goes in the opposite direction to the increase in metallicities of Δ[M/H] ~ 0.20dex that would be required to fix the offset between predicted and observed RGBB luminosities. This comparison is a constraint on `deep-mixing' models of stellar interiors, which predict decreased RGBB star counts. We tabulate the predictions for RGBB star counts as a function of [Fe/H], [α/Fe], CNONa, initial helium abundance, and age. Though our study suggests a small zero-point calibration issue, RGBB star counts should nonetheless be an actionable parameter with which to constrain stellar populations in the differential sense. The most significant outliers are towards the clusters NGC 5024 (M53), NGC 6723, and NGC 7089 (M2), each of which shows a ∼ 2σ deficit in their RGBB star counts.

Abstract Copyright: © 2014 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: evolution - Hertzsprung-Russell and colour-magnitude diagrams - stars: luminosity function, mass function

Simbad objects: 50

goto Full paper

goto View the references in ADS

Number of rows : 50
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3766 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1023 0
3 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 479 0
4 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1349 0
5 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1355 0
6 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 811 0
7 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 786 0
8 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3283 0
9 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2392 0
10 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 409 0
11 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 282 0
12 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 382 0
13 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1894 0
14 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 437 0
15 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 346 0
16 Cl Lynga 7 GlC 16 11 03.65 -55 19 04.0           ~ 103 0
17 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 678 0
18 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 197 0
19 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 755 0
20 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2122 0
21 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 347 0
22 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 632 0
23 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 753 0
24 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 264 0
25 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 334 0
26 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2016 0
27 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 336 1
28 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 375 0
29 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 544 0
30 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 872 1
31 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 354 0
32 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 841 0
33 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 352 0
34 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 219 0
35 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 270 0
36 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 838 1
37 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 217 0
38 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 442 0
39 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 400 0
40 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 359 0
41 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 474 0
42 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 1918 0
43 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 222 0
44 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 345 0
45 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 394 0
46 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 398 0
47 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 508 0
48 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3051 0
49 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 977 1
50 NAME Galactic Bulge reg ~ ~           ~ 3965 0

To bookmark this query, right click on this link: simbad:objects in 2014MNRAS.445.3839N and select 'bookmark this link' or equivalent in the popup menu


2022.11.26-10:10:59

© Université de Strasbourg/CNRS

    • Contact