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Theoretical determination of HI vertical scale heights in the dwarf galaxies DDO 154, Ho II, IC 2574 and NGC 2366
(2011-07)
In this paper, we model dwarf galaxies as a two-component system of gravitationally coupled stars and atomic hydrogen gas in the external force field of a pseudo-isothermal dark matter halo, and numerically obtain the ...
Dark and luminous matter in THINGS dwarf galaxies
(2011)
We present mass models for the dark matter component of seven dwarf galaxies taken from "The H I Nearby Galaxy Survey" (THINGS) and compare these with those taken from numerical Λ cold dark matter (ΛCDM) simulations. The ...
The fine-scale structure of the neutral interstellar medium in nearby galaxies
(2011)
We present an analysis of the properties of H I holes detected in 20 galaxies that are part of "The H I Nearby Galaxy Survey." We detected more than 1000 holes in total in the sampled galaxies. Where they can be measured, ...
A constant molecular gas depletion time in nearby disk galaxies
(2011)
We combine new sensitive, wide-field CO data from the HERACLES survey with ultraviolet and infrared data from GALEX and Spitzer to compare the surface densities of H2, ΣH2, and the recent star formation rate, ΣSFR, over ...
The JCMT nearby galaxies legacy survey - IV. Velocity dispersions in the molecular interstellar medium in spiral galaxies
(2011)
An analysis of large-area CO J = 3-2 maps from the James Clerk Maxwell Telescope for 12 nearby spiral galaxies reveals low velocity dispersions in the molecular component of the interstellar medium. The three lowest ...
A molecular star formation law in the atomic-gas-dominated regime in nearby galaxies
(2011)
We use the IRAM HERACLES survey to study CO emission from 33 nearby spiral galaxies down to very low intensities. Using 21 cm line atomic hydrogen (H I) data, mostly from THINGS, we predict the local mean CO velocity based ...
The central slope of dark matter cores in dwarf galaxies : simulations versus THINGS
(2011)
We make a direct comparison of the derived dark matter (DM) distributions between hydrodynamical simulations of dwarf galaxies assuming ACDM cosmology and the observed dwarf galaxies sample from the THINGS survey in terms ...
The JCMT nearby galaxies legacy survey - V. The CO(J=3-2) distribution and molecular outflow in NGC 4631
(2011)
We have made the first map of CO(J = 3-2) emission covering the disc of the edge-on galaxy, NGC 4631, which is known for its spectacular gaseous halo. The strongest emission, which we model with a Gaussian ring, occurs ...
Environmental effects in galaxy clusters : Infalling groups in Abell 85 and 1367
(2010-12-01)
We are carrying out a multifrequency survey of late type galaxies in nearby clusters with the aim to investigate the effects exerted by both the very local and the global cluster environments. We report new VLA-HI images ...
Dwarf-Galaxy Cosmology
(2010)
Dwarf galaxies provide opportunities for drawing inferences about the processes in the early universe by observing our “cosmological backyard”—the Local Group and its vicinity. This special issue of the open-access journal ...