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13 papers · 2 filters
The mid-infrared extinction in molecular clouds Case study of B 335
Sven Olofsson, Göran Olofsson
The purpose of the investigation is to probe the dust properties inside a molecular cloud, how particle grow and how the presence of ice coatings may change the overall shape of th…
The extinction law for molecular clouds. Case study of B 335
Sven Olofsson, Göran Olofsson
We determine the extinction curve from the UV to the near-IR for molecular clouds and investigate whether current models can adequately explain this wavelength dependence of the ex…
A new method of determining distances to dark globules. The distance to B 335
Sven Olofsson, Göran Olofsson
We observed a test globule, B 335 in U, B, g, r, and I, and together with the 2MASS survey, this data set gives a well-defined spectral energy distribution (SED) of a large number…
Fermi Detection of a Luminous Gamma-ray Pulsar in a Globular Cluster
The Fermi LAT Collaboration
We report the Fermi Large Area Telescope detection of gamma-ray (>100 megaelectronvolts) pulsations from pulsar J1823-3021A in the globular cluster NGC 6624 with high significance…
Resonant structure in the disks of spiral galaxies, using phase-reversals in streaming motions from 2D Hα Fabry-Perot spectroscopy
Joan Font, John E. Beckman, Benoît Epinat +3
In this article we introduce a technique for finding resonance radii in a disk galaxy. We use a two-dimensional velocity field in Hα emission obtained with Fabry-Perot interferomet…
Constraining Galactic cosmic-ray parameters with Z<=2 nuclei
B. Coste, L. Derome, D. Maurin +1
The secondary-to-primary B/C ratio is widely used to study Galactic cosmic-ray propagation processes. The 2H/4He and 3He/4He ratios probe a different Z/A regime, therefore testing…