ELODIE spectrograph
ELODIE was an Echelle - spectrograph installed on 1,93- m - mirror telescope of the Observatoire de Haute-Provence in the southeast of France for the screening of the Extrasolar Planet Search .
Its optical instrumentation was developed by André Baranne from the Observatoire de Marseille . The aim of this spectrograph was the discovery of extrasolar planets through radial velocity method. In addition, ELODIE was also used for the M-Dwarf program .
ELODIE s first light we gained in the year 1993 . After 13 years it was decommissioned in August 2006 and replaced by the SOPHIE spectrograph , a new instrument of the same type but with improved properties, just one month later in September 2006.
properties
The electromagnetic spectrum was divided into 67 spectral diffraction orders in a single image by ELODIE in the wavelength range from 389.5 nm to 681.5 nm. The instrument was located in a temperature-controlled room and was supplied with light through glass fibers from the Cassegrain focus of the telescope .
One of the unique features of ELODIE was the integrated data reduction , which allowed an immediate, extremely accurate measurement of the radial velocity down to Δv = ± 7 m / s of the examined objects by cross-correlation using a numerical aperture.
Over 34,000 spectra were obtained with the help of ELODIE , over 20,000 of which are publicly available via an online archive. The spectrograph was the product of a collaboration between the Observatoire de Haute-Provence , the Geneva Observatory and the Observatoire de Marseille .
A publication describing the instrument appeared in Astronomy and Astrophysics .
Planets discovered with ELODIE
The first extrasolar planet was discovered in 1995 with the help of this instrument around the sun-like star 51 Pegasi b , a total of over twenty such planets by means of ELODIE . In addition to the radial velocity method, planets could also be discovered with ELODIE using the transit method .
| planet | Date of announcement |
|---|---|
| 51 Pegasi b | October 6, 1995 |
| Gliese 876 b | 1998 |
| 14 Herculis b | July 6, 1998 |
| HD 209458 b | 1999 |
additional
- List of exoplanets
- The CORALIE spectrograph was an identical instrument for the survey . Survey for Southern Extra-solar Planets .
Individual evidence
- ^ The ELODIE-SOPHIE Archive in the Virtual Observatory , S. Ilovaisky, Ph. Prugniel, C. Soubiran, M. Koleva, and H. Le Coroller, in Astronomical spectroscopy and the Virtual Observatory, Madrid (Spain), March 21-23 , 2007 , Madrid, 2007.
- ↑ A user's guide to Elodie archive data products , Elodie archive, Observatoire de Haute Provence. Accessed on line June 15, 2008.
- ↑ The ELODIE archive . Accessed on line June 15, 2008.
- ↑ ELODIE: A spectrograph for accurate radial velocity measurements, A. Baranne et al., Astronomy and Astrophysics Supplement 119 (October 1996), pp.373-390. bibcode : 1996A & AS..119..373B
- ↑ a b Mayor et al. , Didier Queloz: A Jupiter-mass companion to a solar-type star . In: Nature . 378, No. 6555, 1995, pp. 355-359. bibcode : 1995Natur.378..355M . doi : 10.1038 / 378355a0 .
- ↑ a b Queloz et al. : Detection of a spectroscopic transit by the planet orbiting the star HD209458 . In: Astronomy and Astrophysics Letters . 359, 2000, pp. L13-L17.
- ↑ Delfosse, X. et al. : The closest extrasolar planet. A giant planet around the M4 dwarf GL 876 . In: Astronomy and Astrophysics . 338, 1998, pp. L67-L70. arxiv : astro-ph / 9808026 . bibcode : 1998A & A ... 338L..67D .
- ↑ Naef et al. , M. Mayor, JL Beuzit, C. Perrier, D. Queloz, JP Sivan, S. Udry: The ELODIE survey for northern extra-solar planets. III. Three planetary candidates detected with ELODIE . In: Astronomy and Astrophysics . 414, No. 1, 2004, pp. 351-359. arxiv : astro-ph / 0310261 . bibcode : 2004A & A ... 414..351N . doi : 10.1051 / 0004-6361: 20034091 .