Document Type
Article
Publication Date
January 2016
Publication Title
Publications of the Astronomical Society of Australia
Volume
33
DOI
10.1017/pasa.2016.29
Keywords
galaxies: abundances, galaxies: individual: NGC 1023, galaxies: kinematics and dynamics, methods: observational, techniques: spectroscopic
Disciplines
Astrophysics and Astronomy | External Galaxies
Abstract
Integral field unit spectrographs allow the 2D exploration of the kinematics and stellar populations of galaxies, although they are generally restricted to small fields-of-view. Using the large field-of-view of the DEIMOS multislit spectrograph on Keck and our Stellar Kinematics using Multiple Slits technique, we are able to extract sky-subtracted stellar light spectra to large galactocentric radii. Here, we present a new DEIMOS mask design named SuperSKiMS that explores large spatial scales without sacrificing high spatial sampling. We simulate a set of observations with such a mask design on the nearby galaxy NGC 1023, measuring stellar kinematics and metallicities out to where the galaxy surface brightness is orders of magnitude fainter than the sky. With this technique we also reproduce the results from literature integral field spectroscopy in the innermost galaxy regions. In particular, we use the simulated NGC 1023 kinematics to model its total mass distribution to large radii, obtaining comparable results with those from published integral field unit observation. Finally, from new spectra of NGC 1023, we obtain stellar 2D kinematics and metallicity distributions that show good agreement with integral field spectroscopy results in the overlapping regions. In particular, we do not find a significant offset between our Stellar Kinematics using Multiple Slits and the ATLAS3Dstellar velocity dispersion at the same spatial locations.
Recommended Citation
Nicola Pastorello, Duncan Forbes, Adriano Poci, Aaron Romanowsky, Richard McDermid, Adebusola Alabi, Jean Brodie, Michele Cappellari, Vincenzo Pota, and Caroline Foster. "The SLUGGS Survey: A New Mask Design to Reconstruct the Stellar Populations and Kinematics of Both Inner and Outer Galaxy Regions" Publications of the Astronomical Society of Australia (2016). https://doi.org/10.1017/pasa.2016.29
Comments
This is the Accepted Manuscript of an article that was published in Publications of the Astronomical Society of Australia, volume 33, January 2016. © Astronomical Society of Australia 2016; published by Cambridge University Press. The Version of Record is available online at this link: http://dx.doi.org/10.1017/pasa.2016.29