4 research outputs found
Modelling the Pan-Spectral Energy Distribution of Starburst Galaxies: I. The role of ISM pressure & the Molecular Cloud Dissipation Timescale
In this paper, we combine the stellar spectral synthesis code STARBURST 99,
the nebular modelling code MAPPINGS IIIq, a 1-D dynamical evolution model of
\HII regions around massive clusters of young stars and a simplified model of
synchrotron emissivity to produce purely theoretical self-consistent synthetic
spectral energy distributions (SEDs) for (solar metallicity) starbursts lasting
some years. These SEDs extend from the Lyman Limit to beyond 21 cm. We
find that two ISM parameters control the form of the SED; the pressure in the
diffuse phase of the ISM (or, equivalently, its density), and the molecular
cloud dissipation timescale. We present detailed SED fits to Arp 220 and NGC
6240, and we give the predicted colors for starburst galaxies derived from our
models for the IRAS and the Spitzer Space Observatory MIPS and IRAC
instruments. Our models reproduce the spread in observed colors of starburst
galaxies. Finally, we present absolute calibrations to convert observed fluxes
into star formation rates in the UV (GALEX), at optical wavelengths
(H), and in the IR (IRAS or the Spitzer Space Observatory). (Abstract
Truncated)Comment: 56 pages, 16 figures, accepted by The Apstrophysical Journal For
version with full, colour figures go to
http://www.mso.anu.edu.au/~bgroves/starburst
New records and detailed distribution and abundance of selected arthropod species collected between 1999 and 2011 in Azorean native forests.
Of the total 286 species identified, 81% were captured between 1999 and 2000, a period
during which only 39% of all the samples were collected. On average, arthropod richness
for each island increased by 10% during the time frame of these projects. The classes
Arachnida, Chilopoda and Diplopoda represent the most remarkable cases of new island
records, with more than 30% of the records being novelties. This study stresses the need
to expand the approaches applied in these projects to other habitats in the Azores, and
more importantly to other less surveyed taxonomic groups (e.g. Diptera and Hymenoptera).
These steps are fundamental for getting a more accurate assessment of biodiversity in the
archipelago
Transcription profiling of human CD34 cells isolated from cord blood or peripheral blood transduced with AML1-ETO or empty vector (MIGR1)
Human CD34 cells isolated from cord blood or peripheral blood transduced with AML1-ETO or empty vector (MIGR1)
Transcription profiling of human CD34 cells isolated from cord blood or peripheral blood transduced with AML1-ETO or empty vector (MIGR1)
Human CD34 cells isolated from cord blood or peripheral blood transduced with AML1-ETO or empty vector (MIGR1)