| Autor: |
M. Faundez-Abans, Vera A. F. Martin, Paulo C.R. Poppe, I. F. Fernandes, Mariângela De Oliveira-Abans |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Sitientibus Série Ciências Físicas. 6:17 |
| ISSN: |
1984-5812 |
| Popis: |
We investigate in detail the kinematics and morphology of the starburst galaxy HRG 02401. Our observational data were obtained at the 1.6-m OPD/LNA-MCT telescope with longslit spectroscopy. The original image has been enhanced to highlight some substructures and it has shown that HRG 02401 is in phase of active merging with a companion galaxy. The resulting tidal perturbations may have induced the apparent two-armed spiral pattern and driven a substantial fraction of disc gas inwards. We have been able to study the detailed picture of ionized gas motions up to galactocentric distances of 11 kpc and to construct the stellar velocity field for the inner region. Although the optical ring is quite narrow, H(alpha) emission is observed all the way through the center of the galaxy, indicating the presence of an extended gaseous disk. We have estimated nuclear redshift of z = 0.017, corresponding to a heliocentric velocity of 5,206 \pm 13.01 km s(-1). The errors in the fluxes were mostly caused by uncertainties in the placement of the continuum level. Some other physical parameters have been derived whenever possible. All spectra were reduced and analyzed in a homogeneous way with the standard IRAF procedures. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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