[en] We studied the ''Catalogue of Isolated Pairs of Galaxies in the Northern Hemisphere'' by Karachentsev (1972) and a well matched comparison sample taken from the ''Catalogue of Isolated Galaxies'' by Karachentseva (1973) in order to quantify the enhanced FIR emission properties of interacting galaxies. 8 refs, 6 figs

[en] Several of the brighter and more extended H II regions detected by Harper and Low in the far infrared were studied

[en] Results are presented of far-infrared photometric measurements of the Galactic Centre region. The observations have been made in two wavelength bands simultaneously, during balloon flights conducted in the south of France in 1972 and 1973 in co-operation with CNES

[en] The design of the 102-cm balloon-borne far-infrared telescope is discussed, with emphasis on the optics, detectors, position-determination systems, and data processing. Observations of Orion A give the dust efficiency ratio Q/sub uv//sup ext//Q/sub 69μ//sup abs/ = 300. Observations of W3A show that the HII region is not completely surrounded by the dense dust cloud

[en] A coarse resolution spectrum of the Orion Nebula between 65 and 125 microns is presented which closely fits the color dependence of a 75 K blackbody. A high resolution search for O III at 88.16 microns yields an upper limit below theoretical predictions. Observations were carried out in November, 1974, using the 31 cm gyrostabilized telescope mounted in the NASA Lear jet. The instrument employed was a fully liquid helium cooled grating spectrometer with a 3 mm entrance slit that gave a square beam on the sky, 5 arc minutes in diameter. The results are presented. (auth)

[en] Spectral observations of W51 as well as maps of W51 and the Galactic Centre region in the 40-350μm band obtained from observations with a 40-cm diameter balloon-borne telescope system are presented and discussed

[en] Broadband 40-350μm fluxes are presented for 56 sources observed with the University College London balloon-borne telescope. Within our estimated pointing accuracy, all of these sources can be identified with H II regions. The measured fluxes, together with available radio continuum data, have been used to investigate further the relationship between infrared and radio flux and to estimate effective dust absorption depths and dust-to-gas ratios within the ionised regions

[en] 15 far-infrared sources were found around HD 97300 and HD 97048. 3 of them are not included in the IRAS Point Source Catalogue, for 8 upper limits in the IPSC we have now determined fluxes, and confused sources have been separated better. This indicates that even this nearby region of star formation cannot be studied by just inspecting the IPSC. By including (V)JHK observations the bolometric luminosities of these sources are determined: they range from 0.2 to 20 L_Sun. It presumably concerns pre-main-sequence stars ranging in (expected) spectral type from M1 to A7. (author). 1 fig., 1 tab., 11 refs

No abstract available

[en] The first successful flight of a balloon-borne 1-m telescope for far-infrared (>40μm) astronomy occurred on 4 February 1974 (UT), from Palestine, Texas. During 6h at float altitude, the gyro-stabilised telescope mapped the intensity of far-infrared radiation from the H II regions Ori A and W3 with a resolution of 1'. Partial maps of these regions were made with a resolution of 0.5'. These sources were resolved into several components, some of which were previously unknown. Observations of Mars were used for calibration