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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hakobyan, A. A. Petrosian, A. R. Yeghazaryan, A. A. Boulesteix, J. |
| Copyright Year | 2007 |
| Abstract | The galaxy NGC6384 has been observed with an IPCS through Hα and [NII] narrow-band interference filters for direct imagery with the 2.6-m Byurakan telescope. We studied the main physical parameters of the identified 98 HII regions, their diameter and luminosity functions, as well the [NII]/Hα ratio distribution. The integrated distribution function of the HII region diameters can be well fitted by the exponential function. The characteristic diameter has the value (Do = 217 pc) predicted for a galaxy of its measured luminosity. The luminosity function of HII regions has a double power law profile with relatively shallow slope at low luminosities (α = −0.4), an abrupt turnover at logL(Hα) ≈ 38.75, and sharper slope at higher luminosities (α = −2.3). The correlation between the luminosity and diameter of HII regions confirms that in general they are constant density, radiation-bound systems. [NII]/Hα ratio data for the HII regions show that there is a negative radial gradient of [NII]/Hα. In the central region of the galaxy, nitrogen abundance is higher than in the periphery. The properties of the HII region population of this AGN galaxy do not differ significantly from the properties of the HII region population of the “normal” galaxies. Reexamining the location of the type Ia SN 1971L in the galaxy, we confirm that it lies on the spiral arm at about 8″.6 far from the closest HII region N 53 (F81). Such a location can be taken as proof that the progenitor of this SN does not belong to an old, evolved stellar population. |
| Starting Page | 426 |
| Ending Page | 439 |
| Page Count | 14 |
| File Format | |
| ISSN | 05717256 |
| Journal | Astrophysics |
| Volume Number | 50 |
| Issue Number | 4 |
| e-ISSN | 15738191 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2007-01-01 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | galaxies stellar content HII regions chemical abundance supernovae Astronomy, Astrophysics and Cosmology Astrophysics Extraterrestrial Physics, Space Sciences Astronomy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics |
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