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Ultra-deep imaging of nearby galaxy outskirts from the ground

Published online by Cambridge University Press:  21 March 2017

Ignacio Trujillo
Ignacio Trujillo*
Affiliation:
Instituto de Astrofísica de Canarias, c/ Vía Láctea s/n, E-38205, La Laguna, Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, E-38206, La Laguna, Tenerife, Spain email: [email protected]
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Abstract

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We show how present-day 10 meter class telescopes can provide broadband imaging 1.5-2 mag deeper than most previous results within a reasonable amount of time ( ~ 8h on source integration). We illustrate the ability of the 10.4 m Gran Telescopio de Canarias (GTC) telescope to produce imaging with a limiting surface brightness of 31.5 mag/arcsec2 (3σ in 10 × 10 arcsec boxes). We explore the stellar halos of nearby galaxies obtaining surface brightness radial profiles down to μr ~ 33 mag/arcsec2. This depth is similar to that obtained using star counts techniques of Local Group galaxies, but is achieved at a distance where this technique is unfeasible.

Keywords

galaxies: evolutiongalaxies: formationgalaxies: halosgalaxies: photometrygalaxies: spiral
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 155 - 162
Copyright
Copyright © International Astronomical Union 2017 

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