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Scattered H-alpha light from Galactic dust clouds
K. Mattila, M. Juvela, K. Lehtinen
Bright emission nebulae, or HII regions, around hot stars are readily seen in H-alpha light. However, the all-pervasive faint H-alpha emission has only recently been detected and m…
The Power Spectrum of Supersonic Turbulence in Perseus
Paolo Padoan, Mika Juvela, Alexei Kritsuk +1
We test a method of estimating the power spectrum of turbulence in molecular clouds based on the comparison of power spectra of integrated intensity maps and single-velocity-channe…
Faint far-infrared sources: Galaxies, clusters, or cluster galaxies
P. Vaisanen, M. Juvela, K. Mattila +1
We present results from an on-going follow-up campaign of far-infrared sources detected as part of our ISOPHOT Cosmic IR Background project. Fields have been imaged in the optical…
Simulations of polarized dust emission
V. -M. Pelkonen, M. Juvela, P. Padoan
Our aim is to study the polarization of thermal dust emission to see if the alignment of grain by radiative torques could explain the observed relation between the degree of polari…
Can We Trust the Dust? Evidence of Dust Segregation in Molecular Clouds
Paolo Padoan, Laurent Cambresy, Mika Juvela +3
Maps of estimated dust column density in molecular clouds are usually assumed to reliably trace the total gas column density structure. In this work we present results showing a cl…
HCN and HNC mapping of the protostellar core Cha-MMS1
P. P. Tennekes, J. Harju, M. Juvela +1
Aims. The purpose of this study is to investigate the distributions of the isomeric molecules HCN and HNC and estimate their abundance ratio in the protostellar core Cha-MMS1 locat…