Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes
The report describes a new effective technique of atmospheric image motion suppression for observations with large ground-based one-aperture telescopes. The method is based on the use of an enhanced symmetrization of star reference fields. Another (optional) element of the technique is a special apo...
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| Опубліковано в: : | Кинематика и физика небесных тел |
|---|---|
| Дата: | 2005 |
| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2005
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| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/79717 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes / P. Lazorenko // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 537-540. — Бібліогр.: 1 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-79717 |
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| spelling |
Lazorenko, P. 2015-04-03T20:17:47Z 2015-04-03T20:17:47Z 2005 Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes / P. Lazorenko // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 537-540. — Бібліогр.: 1 назв. — англ. 0233-7665 https://nasplib.isofts.kiev.ua/handle/123456789/79717 The report describes a new effective technique of atmospheric image motion suppression for observations with large ground-based one-aperture telescopes. The method is based on the use of an enhanced symmetrization of star reference fields. Another (optional) element of the technique is a special apodization of the telescope entrance pupil that is especially effective for extremely large (D > 30 m) apertures. Numerical simulations made for a 10 m telescope show that both atmospheric image motion and photon noise of the star images with a 10 min exposure can be reduced to less than 10 microarcsec. Evaluations refer to the Cn² vertical profile, which is typical for the Chilean astronomical sites, a moderate FWHM = 0.4" and star densities at galactic coordinates l = 0°, b = 20°. For a 100 m telescope, the precision is equal to 0.2 microarcsec/10 min for regions of high star density and drops to 1 microarcsec/10 min at the Galactic Pole. For the 10 m telescope, which measures astrometric reflex motion of stars with an accuracy of 10 microarcsec, a detection limit for Saturn- and Jupiter-sized planets is about 0.5–1 kpc. Application of very high precision astrometry is especially useful for searching extrasolar planets around the Pre-Main-Sequence, early Main-Sequence, and low-mass stars whose investigations with the aid of the radial velocity technique is difficult. en Головна астрономічна обсерваторія НАН України Кинематика и физика небесных тел MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes |
| spellingShingle |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes Lazorenko, P. MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
| title_short |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes |
| title_full |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes |
| title_fullStr |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes |
| title_full_unstemmed |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes |
| title_sort |
atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes |
| author |
Lazorenko, P. |
| author_facet |
Lazorenko, P. |
| topic |
MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
| topic_facet |
MS6: New Trends, Research Directions, and Perspective Programs in the Field of Astronomy and Astrophysics |
| publishDate |
2005 |
| language |
English |
| container_title |
Кинематика и физика небесных тел |
| publisher |
Головна астрономічна обсерваторія НАН України |
| format |
Article |
| description |
The report describes a new effective technique of atmospheric image motion suppression for observations with large ground-based one-aperture telescopes. The method is based on the use of an enhanced symmetrization of star reference fields. Another (optional) element of the technique is a special apodization of the telescope entrance pupil that is especially effective for extremely large (D > 30 m) apertures. Numerical simulations made for a 10 m telescope show that both atmospheric image motion and photon noise of the star images with a 10 min exposure can be reduced to less than 10 microarcsec. Evaluations refer to the Cn² vertical profile, which is typical for the Chilean astronomical sites, a moderate FWHM = 0.4" and star densities at galactic coordinates l = 0°, b = 20°. For a 100 m telescope, the precision is equal to 0.2 microarcsec/10 min for regions of high star density and drops to 1 microarcsec/10 min at the Galactic Pole. For the 10 m telescope, which measures astrometric reflex motion of stars with an accuracy of 10 microarcsec, a detection limit for Saturn- and Jupiter-sized planets is about 0.5–1 kpc. Application of very high precision astrometry is especially useful for searching extrasolar planets around the Pre-Main-Sequence, early Main-Sequence, and low-mass stars whose investigations with the aid of the radial velocity technique is difficult.
|
| issn |
0233-7665 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/79717 |
| citation_txt |
Atmospheric limitations to astrometric detection of extra-solar planets with very large telescopes / P. Lazorenko // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 537-540. — Бібліогр.: 1 назв. — англ. |
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AT lazorenkop atmosphericlimitationstoastrometricdetectionofextrasolarplanetswithverylargetelescopes |
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2025-12-01T21:26:42Z |
| last_indexed |
2025-12-01T21:26:42Z |
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1850860933887295488 |