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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Lapinov, A.V. |
| Copyright Year | 2010 |
| Description | Author affiliation: Institute of Applied Physics of the RAS, 46 Uljanov str., Nizhny Novgorod, 603950, Russia (Lapinov, A.V.) |
| Abstract | Due to significant increase of the accuracy of measured laboratory frequencies of interstellar molecular lines and their hyperfine splitting [1–3], tremendous increase of receivers sensitivity and frequency resolution of digital spectrometers, modern radioastronomical observations allow us to measure turbulence and systematic velocity gradients in star forming regions with precision about 1 m/s. The reported results show a search for and detailed multiline studies of collapsing cores in several dozens of dark clouds performed with MPIfR-100m, NRO-45m, IRAM-30m, OSO-20m, SETS-15m and CSO-10.4m telescopes. It is shown that by using developed by us codes for MEM deconvolution [4] we increase significantly effective spatial resolution. Due to high spatial and frequency resolution differential cloud rotation and strong molecular depletion in central parts of the objects was revealed in a set of star forming regions. From comparison of precise laboratory and interstellar line frequencies a strong upper limit is obtained on variations of the electron to proton mass ratio [5]. It is shown how the detailed analysis of spectra, obtained at very high accuracy, makes it possible to draw the far reaching conclusions relative to the physical properties of our Universe. |
| Starting Page | 1 |
| Ending Page | 1 |
| File Size | 201237 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781424479009 |
| e-ISBN | 9781424478996 |
| DOI | 10.1109/MSMW.2010.5545980 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-21 |
| Publisher Place | Ukraine |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Frequency measurement Spectroscopy Clouds Laboratories Extraterrestrial measurements Spatial resolution Magnetic cores |
| Content Type | Text |
| Resource Type | Article |
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