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PHYSICS REVEALED BY BROAD-RANGE CO LADDERS AND FINE-STRUCTURE LINES IN M83

  • Wu, Ronin (Department of Astronomy, the University of Tokyo)
  • Received : 2016.02.29
  • Accepted : 2016.11.02
  • Published : 2017.03.31
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Abstract

Since the launch of the Herschel Space Observatory, our understanding about the photo-dissociation regions (PDR) has taken a step forward. In the bandwidth of the Fourier Transform Spectrometer (FTS) of the Spectral and Photometric Imaging REceiver (SPIRE) on board Herschel, ten CO rotational transitions, including J = 4 - 3 to J = 13 - 12, and three fine structure lines, including [$C{\small{I}}$] 609, [$C{\small{I}}$] 370, and [$N{\small{II}}$] $205{\mu}m$, are covered. I present our findings from the FTS observations at the nuclear region of M83, based on the spatially resolved physical parameters derived from the CO spectral line energy distribution (SLED) map and the comparisons with the dust properties and star-formation tracers. This article discusses (1) the potential of using [$N{\small{II}$] 205 and [$C{\small{I}}$] $370{\mu}m$ as star-formation tracers; (2) the excitation mechanisms of warm CO in the nuclear region of M83.

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References

  1. Bayet, E., Gerin, M., Phillips, T. G., & Contursi, A., 2006, A survey of submillimeter C and CO lines in nearby galaxies, A&A, 460, 467 https://doi.org/10.1051/0004-6361:20053872
  2. Galliano, F, Hony, S., Bernard, J. -P., et al., 2011, Non-standard grain properties, dark gas reservoir, and extended submillimeter excess, probed by Herschel in the Large Magellanic Cloud, A&A, 536, 88 https://doi.org/10.1051/0004-6361/201117952
  3. Hao, C.-N., Kennicutt, R. C., Johnson, B. D., et al., 2011,Dust-Corrected Star Formation Rates of Galaxies. II. Combinations of Ultraviolet and Infrared Tracers, ApJ, 741, 124 https://doi.org/10.1088/0004-637X/741/2/124
  4. Kennicutt, R. C. J., Calzetti, D., Walter, F., et al., 2007, Star Formation in NGC 5194 (M51a). II. The Spatially Resolved Star Formation Law, ApJ, 671, 333 https://doi.org/10.1086/522300
  5. Lundgren, A. A., Wiklind, T., Olofsson, H., & Rydbeck, G., 2004, Molecular gas in the galaxy M83. I - The molecular gas distribution, A&A, 413, 505 https://doi.org/10.1051/0004-6361:20031507
  6. van der Tak, F. F. S., Black, J. H., Sch'oier, F. L., Jansen, D. J., & van Dishoeck, E. F., 2007, A computer program for fast non-LTE analysis of interstellar line spectra, A&A, 468, 627 https://doi.org/10.1051/0004-6361:20066820
  7. Wu, R., Galliano, F., Madden, S. C., et al., 2015, Spatially resolved physical conditions of molecular gas and potential star formation tracers in M83, revealed by the Herschel SPIRE FTS, A&A, 575, 88 https://doi.org/10.1051/0004-6361/201423847
  8. Zhao, Y., Lu, N., Xu, C. K., et al. 2013, A Herschel Survey of the [N II] 205 micron Line in Local Luminous Infrared Galaxies - The [N II] 205 micron Emission as a Star Formation Rate Indicator, ApJ, 765, L13 https://doi.org/10.1088/2041-8205/765/1/L13