SIMBAD references

2014MNRAS.441.2996A - Mon. Not. R. Astron. Soc., 441, 2996-3008 (2014/July-2)

A hyperspectral view of Cassiopeia A.


Abstract (from CDS):

We used the imaging Fourier transform spectrometer Spectromètre Imageur de l'Observatoire du Mont-Mégantic (SpIOMM) to obtain hyperspectral cubes of the young supernova remnant Cassiopeia A (Cas A). The cubes contain over 5000 spatially resolved spectra covering the spectral range 6480-7050Å. We first investigate the slow-moving N-rich quasi-stationary flocculi by measuring their radial velocity as well as the [Nii] λ6583/Hα ratio. No correlation between their radial velocity and [Nii] λ6583/Hα ratio with their location has been found. We used multi-epoch observations from the Hubble Space Telescope to create a proper motion map, showing the displacement of several filaments over the most part of Cas A. Combining data from SpIOMM and Hubble, we re-evaluate the distance to Cas A and obtained 3.33±0.10 kpc, which is in good agreement with previous estimates. Finally, we obtain a three-dimensional spatial view of the [Sii] λλ6716, 6731 emissions showing their location, expansion velocity and the [Sii] doublet line ratio for multiple locations in the remnant. The velocity asymmetry reported by previous analyses is clearly visible. Also, the [Sii] doublet ratio (with a mean value of 0.5±0.2) indicates a very high and variable electronic density throughout the remnant.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): techniques: imaging spectroscopy - proper motions - ISM: individual objects: Cassiopeia A - ISM: supernova remnants

Nomenclature: Fig. 2, Table 3: [ABD2014] QSF NNa (Nos 1-6, 7a-7c, 8a-8b, 9a-9b, 10-11, 12a-12b, 13-30, 31a-31c, 32-44).

Status at CDS:   All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 2

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