A method to resolve the nuclear activity in galaxies, as applied to NGC1358

Details A method to resolve the nuclear activity in galaxies, as applied to NGC1358 A method to resolve the nuclear activity in galaxies, as applied to NGC1358

2011-01-07

arxiv.org/abs/1101.1337v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

to appear in proceedings for the IAU 277th Symposium, Editors: C. Carignan, F. Combes, K. Freeman

Scientific paper

Nuclear regions of galaxies generally host a mixture of components with different exitation, composition, and kinematics. Derivation of emission line ratios and kinematics could then be misleading, if due correction is not made for the limited spatial and spectral resolutions of the observations. The aim of this paper is to demonstrate, with application to a long slit spectrum of the Seyfert2 galaxy NGC1358, how line intensities and velocities, together with modelling and knowledge of the point spread function, may be used to resolve the differing structures. In the situation outlined, the observed kinematics differs for different spectral lines. From the observed intensity and velocity distributions of a number of spectral lines and with some reasonable assumptions to diminish the number of free parameters, the true line ratios and velocity structures may be deduced. A preliminary solution for the nuclear structure of NGC1358 is obtained, involving a nuclear point source and an emerging outflow of high excitation with a post shock cloud, as well as a nuclear emission line disk rotating in the potential of a stellar bulge and expressing a radial exitation gradient. The method results in a likely scenario for the nuclear structure of NGC1358. For definitive results an extrapolation of the method to two dimensions combined with the use of integral field spectroscopy will generally be necessary.

Affiliated with

Also associated with

No associations

Rating

A method to resolve the nuclear activity in galaxies, as applied to NGC1358 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A method to resolve the nuclear activity in galaxies, as applied to NGC1358, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A method to resolve the nuclear activity in galaxies, as applied to NGC1358 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-483091