C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST17:19:51

2014A&A...568A..89G - Astronomy and Astrophysics, volume 568A, 89-89 (2014/8-1)

Probing the nuclear star cluster of galaxies with extremely large telescopes.


Abstract (from CDS):

The unprecedented sensitivity and spatial resolution of next-generation, ground-based, extremely large telescopes (ELTs) will open a completely new window on the study of resolved stellar populations. In this paper we study the feasibility of the analysis of nuclear star cluster (NSC) stellar populations with ELTs. To date, NSC stellar population studies are based on the properties of their integrated light. NSCs are in fact observed as unresolved sources even with the HST. We explore the possibility of obtaining direct estimates of the age of NSC stellar populations from the photometry of main-sequence turn-off stars. We simulated ELT observations of NSCs at different distances and with different stellar populations. Photometric measurements on each simulated image were analysed in detail and results about photometric accuracy and completeness are reported here. We found that the main-sequence turn-off is detectable - and therefore the age of stellar populations can be directly estimated - up to 2Mpc for old, up to 3Mpc for intermediate-age and up to 4-5Mpc for young stellar populations. We found that for this particular science case, the performances of TMT and E-ELT are of comparable quality.

Abstract Copyright:

Journal keyword(s): instrumentation: adaptive optics - instrumentation: high angular resolution - galaxies: clusters: general - infrared: stars - methods: observational

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
1 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1263 2
2 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1490 0
3 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5645 0
4 NAME Local Group GrG ~ ~           ~ 6661 0

    Equat.    Gal    SGal    Ecl

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