2017A&A...608A..53J


Query : 2017A&A...608A..53J

2017A&A...608A..53J - Astronomy and Astrophysics, volume 608A, 53-53 (2017/12-1)

The formation of ultra compact dwarf galaxies and massive globular clusters. Quasar-like objects to test for a variable stellar initial mass function.

JERABKOVA T., KROUPA P., DABRINGHAUSEN J., HILKER M. and BEKKI K.

Abstract (from CDS):

The stellar initial mass function (IMF) has been described as being invariant, bottom-heavy, or top-heavy in extremely dense star-burst conditions. To provide usable observable diagnostics, we calculate redshift dependent spectral energy distributions of stellar populations in extreme star-burst clusters, which are likely to have been the precursors of present day massive globular clusters (GCs) and of ultra compact dwarf galaxies (UCDs). The retention fraction of stellar remnants is taken into account to assess the mass to light ratios of the ageing star-burst. Their redshift dependent photometric properties are calculated as predictions for James Webb Space Telescope (JWST) observations. While the present day GCs and UCDs are largely degenerate concerning bottom-heavy or top-heavy IMFs, a metallicity- and density-dependent top-heavy IMF implies the most massive UCDs, at ages <100Myr, to appear as objects with quasar-like luminosities with a 0.1-10% variability on a monthly timescale due to core collapse supernovae.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: formation - galaxies: star clusters: general - galaxies: high-redshift - galaxies: dwarf - quasars: general - stars: luminosity function, mass function - stars: luminosity function, mass function

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1003 3
2 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2104 1
3 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1699 0
4 Ton 1057 Sy1 09 25 54.7145627448 +19 54 05.064888348   16.02 15.89     ~ 162 0
5 4C 13.41 Sy1 10 07 26.0965408440 +12 48 56.184940764   15.81 15.68     ~ 388 2
6 2MASS J10145491+0033374 Sy1 10 14 54.9035635608 +00 33 37.366161048   20.23 18.94 16.104   ~ 153 0
7 PKS 1020-10 BLL 10 22 32.8200967176 -10 37 44.309640648   16.25 16.11 16.0   ~ 135 1
8 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 808 1
9 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1632 0
10 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6290 0
11 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4532 2
12 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3253 0
13 VV 29 IG 16 06 03.9082292784 +55 25 31.588100688   15.0       ~ 115 0
14 LEDA 3096499 Sy1 16 37 46.4977481160 +11 49 49.203034212   16.98 16.50     ~ 107 0
15 2MASX J23472568+1844502 Sy2 23 47 25.7033911152 +18 44 50.636115024     15.9     ~ 26 0
16 2MASX J23580966-0800049 Sy1 23 58 09.6921883176 -08 00 04.719093984   18.5 17.5     ~ 49 1

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2022.08.18-04:42:24

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