The JCMT Nearby Galaxies Legacy Survey - III. Comparisons of cold dust, polycyclic aromatic hydrocarbons, molecular gas and atomic gas in NGC 2403

G. J. Bendo, C. D. Wilson, B. E. Warren, E. Brinks, H. M. Butner, P. Chanial, D. L. Clements, S. Courteau, J. Irwin, F. P. Israel, J. H. Knapen, J. Leech, H. E. Matthews, S. Mühle, G. Petitpas, S. Serjeant, B. K. Tan, R. P.J. Tilanus, A. Usero, M. VaccariP. van der Werf, C. Vlahakis, T. Wiegert, M. Zhu

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We used Spitzer Space Telescope 3.6, 8.0, 70 and 160 μm data, James Clerk Maxwell Telescope HARP-B CO J = (3-2) data, National Radio Astronomy Observatory 12 m telescope CO J= (1-0) data and Very Large Array H i data to investigate the relations among polycyclic aromatic hydrocarbons (PAHs), cold (∼20 K) dust, molecular gas and atomic gas within NGC 2403, an SABcd galaxy at a distance of 3.13 Mpc. The dust surface density is mainly a function of the total (atomic and molecular) gas surface density and galactocentric radius. The gas-to-dust ratio monotonically increases with radius, arying from ∼100 in the nucleus to ∼400 at 5.5 kpc. The slope of the gas-to-dust ratio is close to that of the oxygen abundance, suggesting that metallicity strongly affects the gas-to-dust ratio within this galaxy. The exponential scale length of the radial profile for the CO J = (3-2) emission is statistically identical to the scale length for the stellar continuum-subtracted 8 μm (PAH 8 μm) emission. However, CO J equals; (3-2) and PAH 8 μm surface brightnesses appear uncorrelated when examining sub-kpc-sized regions.

Original languageEnglish (US)
Pages (from-to)1409-1425
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume402
Issue number3
DOIs
StatePublished - Mar 2010
Externally publishedYes

Keywords

  • Galaxies: individual: NGC 2403
  • Galaxies: ISM
  • Galaxies: spiral
  • Infrared: galaxies
  • Radio lines: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'The JCMT Nearby Galaxies Legacy Survey - III. Comparisons of cold dust, polycyclic aromatic hydrocarbons, molecular gas and atomic gas in NGC 2403'. Together they form a unique fingerprint.

Cite this