کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10704640 | 1022017 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Possibility of measuring the width of narrow Fe II astrophysical laser lines in the vicinity of η Carinae by means of Brown-Twiss-Townes heterodyne correlation interferometry
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Possibility of measuring the width of narrow Fe II astrophysical laser lines in the vicinity of η Carinae by means of Brown-Twiss-Townes heterodyne correlation interferometry Possibility of measuring the width of narrow Fe II astrophysical laser lines in the vicinity of η Carinae by means of Brown-Twiss-Townes heterodyne correlation interferometry](/preview/png/10704640.png)
چکیده انگلیسی
We consider the possibility of measuring the true width of the narrow Fe II optical lines observed in spectra of the Weigelt blobs in the vicinity of η Carinae. The lines originate as a result of stimulated amplification of spontaneous emission of radiation in quantum transitions between energy levels showing inverted population [Johansson, S., Letokhov, V., 2002. JETP Lett. 75 (10) 495; Johansson, S., Letokhov, V., 2003. Phys. Rev. Lett. 90 (1) 01110-1; Johansson, S., Letokhov, V., 2004. A&A 428,497]. The lines should have a subDoppler spectral width of 30-100 MHz, depending on the geometry of the lasing volume. To make measurements with a spectral resolution of R > 107 and an angular resolution better than 0.1â³, we suggest the use of the Brown-Twiss-Townes optical heterodyne intensity correlation interferometry. The estimates made of the S/N ratio for the optical heterodyne astrophysical laser experiment imply that it is feasible.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 10, Issue 5, April 2005, Pages 361-369
Journal: New Astronomy - Volume 10, Issue 5, April 2005, Pages 361-369
نویسندگان
S. Johansson, V.S. Letokhov,