Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033

Details Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033 Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033

2004-12-16

arxiv.org/abs/astro-ph/0412410v1

Astronomy and Astrophysics

Astrophysics

9 pages, accepted for publication in Astronomy and Astrophysics. Figures 1 and 7 are attached as .gif files

Scientific paper

10.1051/0004-6361:20034537

We present integral field spectroscopy of NGC 5033, a low luminosity Seyfert galaxy. The observations were made with INTEGRAL, a fiber based system operating at the WHT. The intensity map of the H$\beta$ emission line represents a spiral or ring-like pattern of HII regions. On the contrary, the [OIII] intensity map morphology is markedly anisotropic. The strong morphological differences imply that the [OIII] emitters represent highly ionized gas illuminated by the central source. The [OIII] map morphology is compatible with a biconical structure of ionization induced by strong extinction in the galaxy disc that also obscures half of the spheroidal stellar bulge. We identify the spectrum corresponding to the Seyfert 1 nucleus from the presence of H$\beta$ broad emission lines. This spectrum is located in a region where strong extinction is expected but exhibits the bluest spectral energy distribution. The Seyfert 1 nucleus seems to be offcenter with respect to the stellar rotation center. This result has been also found in other Seyfert galaxies and interpreted in terms of a past merger. The offcentering could indicate the presence of nonsymmetric departures in the gravitational potential which could be fueling the active nucleus. The kinematics of the [OIII] emitters show important deviations at a kpc scale with respect to the stellar velocity field and show features related to the asymmetrical morphology of the high ionization region.

Affiliated with

Also associated with

No associations

Rating

Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033 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 Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-627924