Kinematics and morphology of the narrow-line region in the Seyfert galaxy NGC 1386

Citation
J. Rossa et al., Kinematics and morphology of the narrow-line region in the Seyfert galaxy NGC 1386, ASTRON ASTR, 362(2), 2000, pp. 501-508
Citations number
45
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
362
Issue
2
Year of publication
2000
Pages
501 - 508
Database
ISI
SICI code
0004-6361(200010)362:2<501:KAMOTN>2.0.ZU;2-G
Abstract
We present a high spatial and spectral resolution 2-D echelle spectrogram o f the Narrow-Line Region in the Seyfert 2 galaxy NGC 1386. This Seyfert gal axy was observed with CASPEC in the wavelength range 5270-7725 Angstrom whi ch covers the H alpha and the [N II] lines. With the use of spatially high resolved images taken with the WFPC2 aboard the Hubble Space Telescope we c ould identify individual components of the Narrow-Line Region in our spectr a. A Gaussian decomposition of the spectra revealed 9 distinct emission-lin e complexes. The brightest component is blue-shifted by -120 +/- 10 km s(-1 ) with respect to the systemic velocity and shows an offset of approximate to -1."6 relative to the nucleus of the galaxy. The true nucleus of NGC 138 6 has a much lower apparent Ha luminosity than this component. The nucleus is probably highly absorbed. Although the majority of the Narrow-Line Regio n components follows a regular velocity field, we find evidence for a separ ate kinematic component. The Narrow-Line Region is aligned anti-parallel to the radio-jet which propagates from the center of NGC 1386 to the south.