Open AccessGMOS IFU observations of the stellar and gaseous kinematics in the centre of NGC 1068
Author(s) -
Gerssen Joris,
AllingtonSmith Jeremy,
Miller Bryan W.,
Turner James E. H.,
Walker Andrew
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09723.x
Subject(s) - physics , atlas (anatomy) , astrophysics , data cube , galaxy , integral field spectrograph , spectrograph , outflow , emission spectrum , william herschel telescope , astronomy , line (geometry) , spectral line , geometry , paleontology , mathematics , quantum mechanics , meteorology , biology
We present a data cube covering the central 10 arcsec of the archetypal active galaxy NGC 1068 over a wavelength range 4200–5400 Å obtained during the commissioning of the integral field unit (IFU) of the Gemini Multi‐object Spectrograph (GMOS) installed on the Gemini‐North telescope. The data cube shows a complex emission line morphology in the [O iii ] doublet and Hβ line. To describe this structure phenomenologically we construct an atlas of velocity components derived from multiple Gaussian component fits to the emission lines. The atlas contains many features which cannot be readily associated with distinct physical structures. While some components are likely to be associated with the expected biconical outflow, others are suggestive of high velocity flows or disc‐like structures. As a first step towards interpretation, we seek to identify the stellar disc using kinematical maps derived from the Mg b absorption line feature at 5170 Å and make associations between this and gaseous components in the atlas of emission line components.