89 citations · 551 across the 17 of their papers we have counts for
17 papers
Perturbation Monte Carlo Method for Quantitative Photoacoustic Tomography
Aleksi Leino, Tuomas Lunttila, Meghdoot Mozumder +2
Quantitative photoacoustic tomography aims at estimating optical parameters from photoacoustic images that are formed utilizing the photoacoustic effect caused by the absorption of…
A CO survey on a sample of Herschel cold clumps
O. Fehér, M. Juvela, T. Lunttila +4
The physical state of cold cloud clumps has a great impact on the process and efficiency of star formation and the masses of the forming stars inside these objects. The sub-millime…
TRUST I: A 3D externally illuminated slab benchmark for dust radiative transfer
K. D. Gordon, M. Baes, S. Bianchi +8
The radiative transport of photons through arbitrary three-dimensional (3D) structures of dust is a challenging problem due to the anisotropic scattering of dust grains and strong…
Composite biasing in Monte Carlo radiative transfer
Maarten Baes, Karl D. Gordon, Tuomas Lunttila +4
Biasing or importance sampling is a powerful technique in Monte Carlo radiative transfer, and can be applied in different forms to increase the accuracy and efficiency of simulatio…
Benchmarking the Calculation of Stochastic Heating and Emissivity of Dust Grains in the Context of Radiative Transfer Simulations
Peter Camps, Karl Misselt, Simone Bianchi +9
We define an appropriate problem for benchmarking dust emissivity calculations in the context of radiative transfer (RT) simulations, specifically including the emission from stoch…
Gas and dust in the star-forming region rho Oph A: The dust opacity exponent beta and the gas-to-dust mass ratio g2d
R. Liseau, B. Larsson, T. Lunttila +6
We aim at determining the spatial distribution of the gas and dust in star-forming regions and address their relative abundances in quantitative terms. We also examine the dust opa…
The degeneracy between dust colour temperature and spectral index. Comparison of methods for estimating the beta(T) relation
M. Juvela, J. Montillaud, N. Ysard +1
Sub-millimetre dust emission provides information on the physics of interstellar clouds and dust. Noise can produce anticorrelation between the colour temperature T_C and the spect…
Estimation of high-resolution dust column density maps. Comparison of modified black-body fits and radiative transfer modelling
M. Juvela, J. Malinen, T. Lunttila
Sub-millimetre dust emission is often used to derive the column density N of dense interstellar clouds. The observations consist of data at several wavelengths but of variable reso…
Constrained simulations of the Antennae Galaxies: Comparison with Herschel-PACS observations
Simon J. Karl, T. Lunttila, T. Naab +3
We present a set of hydro-dynamical numerical simulations of the Antennae galaxies in order to understand the origin of the central overlap starburst. Our dynamical model provides…
Radiative transfer on hierarchial grids
T. Lunttila, M. Juvela
We present new methods for radiative transfer on hierarchial grids. We develop a new method for calculating the scattered flux that employs the grid structure to speed up the compu…
Profiles of interstellar cloud filaments. Observational effects in synthetic sub-millimetre observations
M. Juvela, J. Malinen, T. Lunttila
Sub-millimetre observations suggest that the filaments of interstellar clouds have rather uniform widths and can be described with the so-called Plummer profiles. The shapes of the…
Reliability of NH3 as the temperature probe of cold cloud cores
M. Juvela, J. Harju, N. Ysard +1
The temperature is a central parameter affecting the chemical and physical properties of dense cores of interstellar clouds and their evolution to star formation. The chemistry and…
Mapping the prestellar core Ophiuchus D (L1696A) in ammonia
Jukka Ruoskanen, Jorma Harju, Mika Juvela +5
The gas kinetic temperature in the centres of starless, high-density cores is predicted to fall as low as 5-6 K. The aim of this study was to determine the kinetic temperature dist…
Galactic cold cores II. Herschel study of the extended dust emission around the first Planck detections
M. Juvela, I. Ristorcelli, V. -M. Pelkonen +15
Within the project Galactic Cold Cores we are carrying out Herschel photometric observations of cold interstellar clouds detected with the Planck satellite. The three fields observ…
Accuracy of core mass estimates in simulated observations of dust emission
J. Malinen, M. Juvela, D. C. Collins +2
We study the reliability of mass estimates obtained for molecular cloud cores using sub-millimetre and infrared dust emission. We use magnetohydrodynamic simulations and radiative…
The Super-Alfvénic Model of Molecular Clouds: Predictions for Mass-to-Flux and Turbulent-to-Magnetic Energy Ratios
Tuomas Lunttila, Paolo Padoan, Mika Juvela +1
Recent measurements of the Zeeman effect in dark-cloud cores provide important tests for theories of cloud dynamics and prestellar core formation. In this Letter we report results…
The Super-Alfvénic Model of Molecular Clouds: Predictions for Zeeman Splitting Measurements
Tuomas Lunttila, Paolo Padoan, Mika Juvela +1
We present synthetic OH Zeeman splitting measurements of a super-Alfvenic model of molecular clouds. We select dense cores from synthetic 13CO maps computed from the largest simula…