Abstract
We observed the 1612 Mhz transition of the OH radical of IRAS point source positions, which, were selected by their IR color. The criteria were chosen in that way, that we would have a chance of at least 30% to detect: the 1612 Mhz maser emission (figure 2). The Mira variables and supergiants, both only weak 1612 Mhz masers, outnumber the OH/IR stars at the blue side (Flux (25 um)/Flux(12 um) < 0.5); at the extreme redside (Flux(60 um)/Flux(25 um) > 4.0) the number of compact HII regions and galaxies sharply increases. Although the most red objects in the sample coincide with the planetair nebluae in the color-color diagram, this does not effect the statistics (none of the known nebluae were detected.).
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© 1987 D. Reidel Publishing Company
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te Lintel Hekkert, P. (1987). 1612 Mhz Survey of Selected IRAS Point Sources. In: Kwok, S., Pottasch, S.R. (eds) Late Stages of Stellar Evolution. Astrophysics and Space Science Library, vol 132. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3813-7_11
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DOI: https://doi.org/10.1007/978-94-009-3813-7_11
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8196-2
Online ISBN: 978-94-009-3813-7
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