221 citations · 670 across the 27 of their papers we have counts for
5 papers · 1 filter
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…
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…
The 1 um discontinuity in the Extragalactic Background Light spectrum: an artefact of foreground subtraction
K. Mattila
Several recent papers claim the detection of a near infrared Extragalactic Background Light (EBL) intensity at 1.25 - 4 um that exceeds the integrated light of galaxies by factors…
C18O (3-2) observations of the Cometary Globule CG 12: a cold core and a C18O hot spot
L. K. Haikala, M. Juvela, J. Harju +3
The feasibility of observing the C18O (3-2) spectral line in cold clouds with the APEX telescope has been tested. As the line at 329.330 GHz lies in the wing of a strong atmospheri…
Detection of H2D+ in a massive prestellar core in Orion B
J. Harju, L. K. Haikala, K. Lehtinen +6
Aims. The purpose of this study is to examine the prediction that the deuterated H3+ ion, H2D+, can be found exclusively in the coldest regions of molecular cloud cores. This is al…