We present large-area maps of the CO J=3-2 emission obtained at the James Clerk Maxwell Telescope for four spiral galaxies in the Virgo Cluster. We combine these data with published CO J=1-0, 24 µm, and Hα images to measure the CO line ratios, molecular gas masses, and instantaneous gas depletion times. For three galaxies in our sample (NGC 4254, NGC4321, and NGC 4569), we obtain molecular gas masses of 7 × 10 8 − 3 × 10 9 M ⊙ and disk-averaged instantaneous gas depletion times of 1.1-1.7 Gyr. We argue that the CO J=3-2 line is a better tracer of the dense star forming molecular gas than the CO J=1-0 line, as it shows a better correlation with the star formation rate surface density both within and between galaxies. NGC 4254 appears to have a larger star formation efficiency(smaller gas depletion time), perhaps because it is on its first passage through the Virgo Cluster. NGC 4569 shows a large-scale gradient in the gas properties traced by the CO J=3-2/J=1-0 line ratio, which suggests that its interaction with the intracluster medium is affecting the dense star-forming portion of the interstellar medium directly. The fourth galaxy in our sample, NGC 4579, has weak CO J=3-2 emission despite having bright 24 µm emission; however, much of the central luminosity in this galaxy may be due to the presence of a central AGN.

The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey (NGLS) comprises an H I-selected sample of 155 galaxies spanning all morphological types with distances less than 25 Mpc. We describe the scientific goals of the survey, the sample selection and the observing strategy. We also present an atlas and analysis of the CO J = 3−2 maps for the 47 galaxies in the NGLS which are also part of the Spitzer Infrared Nearby Galaxies Survey. We find a wide range of molecular gas mass fractions in the galaxies in this sample and explore the correlation of the far-infrared luminosity, which traces star formation, with the CO luminosity, which traces the molecular gas mass. By comparing the NGLS data with merging galaxies at low and high redshift, which have also been observed in the CO J = 3−2 line, we show that the correlation of far-infrared and CO luminosity shows a significant trend with luminosity. This trend is consistent with a molecular gas depletion time which is more than an order of magnitude faster in the merger galaxies than in nearby normal galaxies. We also find a strong correlation of the L FIR /L CO(3−2) ratio with the atomic-to-molecular gas mass ratio. This correlation suggests that some of the far-infrared emission originates from dust associated with atomic gas and that its contribution is particularly important in galaxies where most of the gas is in the atomic phase.

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.

We present the results of large-area 12 CO J = 3-2 emission mapping of three nearby field galaxies, NGC 628, NGC 3521, and NGC 3627, completed at the James Clerk Maxwell Telescope as part of the Nearby Galaxies Legacy Survey. These galaxies all have moderate to strong 12 CO J = 3-2 detections over large areas of the fields observed by the survey, showing resolved structure and dynamics in their warm/dense molecular gas disks. All three galaxies were part of the Spitzer Infrared Nearby Galaxies Survey sample, and as such have excellent published multiwavelength ancillary data. These data sets allow us to examine the star formation properties, gas content, and dynamics of these galaxies on sub-kiloparsec scales. We find that the global gas depletion time for dense/warm molecular gas in these galaxies is consistent with other results for nearby spiral galaxies, indicating this may be independent of galaxy properties such as structures, gas compositions, and environments. Similar to the results from The H i Nearby Galaxy Survey, we do not see a correlation of the star formation efficiency with the gas surface density consistent with the Schmidt-Kennicutt law. Finally, we find that the star formation efficiency of the dense molecular gas traced by 12 CO J = 3-2 is potentially flat or slightly declining as a function of molecular gas density, the 12 CO J = 3-2/J = 1-0 ratio (in contrast to the correlation found in a previous study into the starburst galaxy M83), and the fraction of total gas in molecular form.

The Global Financial Crisis (GFC) of 2008/2009 was the largest economic slowdown since the Great Depression. It undermined the growth and development prospects of developing countries. Several recent studies estimate the impact of economic shocks on the poor and vulnerable, especially women and children. Infant and child mortality rates are still likely to continue to decline, but at lower rates than would have been the case in the absence of the GFC. Asia faces special challenges. Despite having been the fastest growing region in the world for decades, and even before the current crisis, this region accounted for nearly 34% of global deaths of children under 5, more than 40% of maternal deaths and 60% of newborn deaths. Global development goals cannot be achieved without much faster and deeper progress in Asia. Current health financing systems in much of Asia are not well placed to respond to the needs of women and their children, or the recent global financial and economic slowdown. Public expenditure is often already too low, and high levels of out-of-pocket health expenditure are an independent cause of inequity and impoverishment for women and their children. The GFC highlights the need for reforms that will improve health outcomes for the poor, protect the vulnerable from financial distress, improve public expenditure patterns and resource allocation decisions, and so strengthen health systems. This paper aims to highlight the most recent assessments of how economic shocks, including the GFC, affect the poor in developing countries, especially vulnerable women and children in Asia. It concludes that conditional cash transfers, increasing taxation on tobacco and increasing the level, and quality, of public expenditure through well-designed investment programmes are particularly relevant in the context of an economic shock. That is because these initiatives simultaneously improve health outcomes for the poor and vulnerable, protect them from further financial distress, improve public financing and/or provide a much-needed counter-cyclical stimulus at times of economic slowdown.