Infrared OH absorption lines in 1612 MHz OH maser sources
نویسندگان
چکیده
منابع مشابه
Infrared OH absorption lines in 1612MHz OH maser sources
ISO mid-infrared absorption data helps to distinguish between radiative and collisional pumping mechanisms in 1612MHz OH masers in various environments. Archive data of OH absorption at 34.6 and 53.3 μm shows different behavior and different pumping rates for different types of maser sources. 1. Mid-Infrared absorption in 1612MHz OH masers Mid-infrared spectroscopy by the Infrared Space Observa...
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The 1612 MHz hydroxyl maser in circumstellar envelopes has long been thought to be pumped by 34.6 µm photons. Only recently, the Infrared Space Observatory has made possible spectroscopic observations which enable the direct confirmation of this pumping mechanism in a few cases. To look for the presence of this pumping line, we have searched the Infrared Space Observatory Data Archive and found...
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(Pseudo) radiative pumprate of OH 1612MHz masers is defined for a sample of 44 OH/IR sources (infrared sources with OH 1612MHz maser), irrespective of the real maser pumping mechanisms. The correlation between the (pseudo) maser pumprates and the evolutionary status of the maser sources reveals that the radiative pumprates of stellar OH masers are nearly fixed, which agrees with the theoretical...
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Compact OH(1720 MHz) masers have proven to be excellent signposts for the interaction of supernova remnants with adjacent molecular clouds. Less appreciated has been the weak, extended OH(1720 MHz) emission which accompanies strong compact maser sources. Recent single-dish and interferometric observations reveal the majority of maser-emitting supernova remnants(SNRs) have accompanying regions o...
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We present the first results of our 3D Monte Carlo maser radiative transfer code, used to model the 1612 MHz OH maser shell and the amplification of emission from the stellar radio-photosphere.
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2007
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921307013221