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


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST03:23:46

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 - 2019
#notes
1 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 942 3
2 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1882 1
3 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1490 0
4 Ton 1057 Sy1 09 25 54.7143564689 +19 54 05.065773105   16.02 15.89     ~ 148 0
5 2XMM J100726.0+124856 Sy1 10 07 26.0965727406 +12 48 56.188170981   15.81 15.68     ~ 373 2
6 2dFGRS TGN357Z241 Sy1 10 14 54.9035683018 +00 33 37.367546308   20.23 18.94 16.104   ~ 147 0
7 PKS 1020-10 BLL 10 22 32.8197688971 -10 37 44.292595545   16.25 16.11 16.0   ~ 131 1
8 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 763 1
9 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1532 0
10 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5645 0
11 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4096 2
12 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2910 0
13 NAME Tadpole Galaxy IG 16 06 03.940 +55 25 31.33   15.0       ~ 105 0
14 2E 3737 Sy1 16 37 46.4976250637 +11 49 49.209457135   16.98 16.50     ~ 103 0
15 2MASX J23472568+1844502 Sy2 23 47 25.7023328812 +18 44 50.635366325     15.9     ~ 26 0
16 2MASX J23580966-0800049 Sy1 23 58 09.6919506623 -08 00 04.712717770   18.5 17.5     ~ 48 1

    Equat.    Gal    SGal    Ecl

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2019.10.23-03:23:46

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