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| Content Provider | Springer Nature Link |
|---|---|
| Author | Dopita, Michael A. Rich, Jeffrey Vogt, Frédéric P. A. Kewley, Lisa J. Ho, I Ting Basurah, Hassan M. Ali, Alaa Amer, Morsi A. |
| Copyright Year | 2013 |
| Abstract | This paper presents a detailed spectral pixel (spaxel) analysis of the ten Luminous Infrared Galaxies (LIRGs) previously observed with the Wide Field Spectrograph (WiFeS), an integral field spectrograph mounted on the ANU 2.3 m telescope, and for which an abundance gradient analysis has already been presented by Rich et al. (Astrophys. J., 753:5, 2012). Here we use the strong emission line analysis techniques developed by Dopita et al. (Astrophys. J. Suppl. Ser., accepted, 2013) to measure the ionisation parameter and the oxygen abundance in each spaxel. In addition, we use the observed Hα flux to determine the surface rate of star formation ( $\mathrm {M}_{\odot }{\rm yr}^{-1}$ kpc−2) and use the [S II] λλ6717/6731 ratio to estimate the local pressure in the ionised plasma. We discuss the correlations discovered between these physical quantities, and use them to infer aspects of the physics of star formation in these extreme star forming environments. In particular, we find a correlation between the star formation rate and the inferred ionisation parameter. We examine the possible reasons for this correlation, and determine that the most likely explanation is that the more active star forming regions have a different distribution of molecular gas which favour higher ionisation parameters in the ionised plasma. |
| Starting Page | 741 |
| Ending Page | 754 |
| Page Count | 14 |
| File Format | |
| ISSN | 0004640X |
| Journal | Astrophysics and Space Science |
| Volume Number | 350 |
| Issue Number | 2 |
| e-ISSN | 1572946X |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2013-12-24 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Stars: star formation Interstellar medium: HII regions Galaxies: starburst, Chemical abundances Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Extraterrestrial Physics, Space Sciences Astrobiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
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