2018MNRAS.478.2461G


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST01:05:28

2018MNRAS.478.2461G - Mon. Not. R. Astron. Soc., 478, 2461-2479 (2018/August-1)

Concurrent formation of supermassive stars and globular clusters: implications for early self-enrichment.

GIELES M., CHARBONNEL C., KRAUSE M.G.H., HENAULT-BRUNET V., AGERTZ O., LAMERS H.J.G.L.M., BASTIAN N., GUALANDRIS A., ZOCCHI A. and PETTS J.A.

Abstract (from CDS):

We present a model for the concurrent formation of globular clusters (GCs) and supermassive stars (SMSs, >=103 M) to address the origin of the HeCNONaMgAl abundance anomalies in GCs. GCs form in converging gas flows and accumulate low-angular momentum gas, which accretes on to protostars. This leads to an adiabatic contraction of the cluster and an increase of the stellar collision rate. A SMS can form via runaway collisions if the cluster reaches sufficiently high density before two-body relaxation halts the contraction. This condition is met if the number of stars >=106 and the gas accretion rate >=105 M Myr–1, reminiscent of GC formation in high gas-density environments, such as - but not restricted to - the early Universe. The strong SMS wind mixes with the inflowing pristine gas, such that the protostars accrete diluted hot-hydrogen burning yields of the SMS. Because of continuous rejuvenation, the amount of processed material liberated by the SMS can be an order of magnitude higher than its maximum mass. This 'conveyor-belt' production of hot-hydrogen burning products provides a solution to the mass budget problem that plagues other scenarios. Additionally, the liberated material is mildly enriched in helium and relatively rich in other hot-hydrogen burning products, in agreement with abundances of GCs today. Finally, we find a super-linear scaling between the amount of processed material and cluster mass, providing an explanation for the observed increase of the fraction of processed material with GC mass. We discuss open questions of this new GC enrichment scenario and propose observational tests.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: black holes - stars: kinematics and dynamics - supergiants - globular clusters: general - galaxies: star clusters: general

Simbad objects: 17

goto Full paper

goto View the reference in ADS

Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Cl Lindsay 1 Cl* 00 03 54 -73 28.3   11.7       ~ 99 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3635 0
3 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11298 1
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9780 1
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5921 1
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15333 1
7 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 280 0
8 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1065 2
9 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1788 1
10 NGC 2808 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1289 0
11 SN 2010dn ev 10 18 19.89 +41 26 28.8           ~ 19 1
12 SN 2002bu SN* 12 17 37.18 +45 38 47.4     15.5     SNIIn? 49 2
13 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3100 0
14 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2046 0
15 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 943 0
16 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1847 0
17 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2957 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018MNRAS.478.2461G and select 'bookmark this link' or equivalent in the popup menu


2021.05.06-01:05:28

© Université de Strasbourg/CNRS

    • Contact