TY - JOUR
T1 - The JCMT Nearby Galaxies Legacy Survey – III. Comparisons of cold dust, polycyclic aromatic hydrocarbons, molecular gas and atomic gas in NGC 2403
AU - Bendo, G.
AU - Wilson, C.D.
AU - Warren, B.E.
AU - Brinks, E.
AU - Butner, H.
AU - Chanial, P.
AU - Clements, D.
AU - Courteau, S.
AU - Irwin, J.
AU - Israel, F.P.
AU - Knapen, J.
AU - Leech, J.
AU - Matthews, H.
AU - Muhle, S.
AU - Petitpas, G.
AU - Serjeant, S.
AU - Tan, B.K.
AU - Tilanus, R.P.J.
AU - Usero, A.
AU - Vaccari, M.
AU - van der Werf, P.
AU - Vlahakis, C.
AU - Wiegert, T.
AU - Zhu, M.
N1 - ‘The definitive version is available at www3.interscience.wiley.com '. Copyright Royal Astronomical Society
PY - 2010
Y1 - 2010
N2 - 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, varying 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= (3–2) and PAH 8 μm surface brightnesses appear uncorrelated when examining sub-kpc-sized regions.
AB - 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, varying 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= (3–2) and PAH 8 μm surface brightnesses appear uncorrelated when examining sub-kpc-sized regions.
U2 - 10.1111/j.1365-2966.2009.16043.x
DO - 10.1111/j.1365-2966.2009.16043.x
M3 - Article
SN - 0035-8711
VL - 402
SP - 1409
EP - 1425
JO - Monthly Notices of the Royal Astronomical Society (MNRAS)
JF - Monthly Notices of the Royal Astronomical Society (MNRAS)
IS - 3
ER -