新一代行星獵人開光 穩定光譜觀測階梯光柵攝譜儀 ESPRESSO 第一道光

[peter]

裝在智利 甚大望遠鏡 Very Large Telescope 的  穩定光譜觀測階梯光柵攝譜儀 ESPRESS  第一道光  

ESPRESSO =  Echelle SPectrograph for Rocky Exoplanet and Stable Spectroscopic Observations  


https://astronomynow.com/2017/12/06/first-light-achieved-for-next-generation-planet-hunter/





This colourful image shows spectral data from the First Light of the ESPRESSO instrument on ESO’s Very Large Telescope in Chile. The light from a star has been dispersed into its component colours. This view has been colourised to indicate how the wavelengths change across the image, but these are not exactly the colours that would be seen visually. Close inspection shows many dark spectral lines in the stellar spectra and also the regular double spots from a calibration light source. The dark gaps are features of how the data is taken, and are not real. Credit: ESO/ESPRESSO team




http://familystar.org.tw/index.php?option=com_smf&Itemid=45&topic=29222.0
行星詳細狀態的後續確認可使用更精密的儀器，例如高精度徑向速度行星搜索器、岩質系外行星與穩定光譜觀測階梯光柵攝譜儀（ESPRESSO）與光譜偏振高對比度系外行星研究儀（VLT-SPHERE），並將以量測母恆星受行星重力影響的徑像速度量測行星的質量，並且使無論氣體或岩石組成的行星密度測定成為可能

[peter]

https://www.youtube.com/watch?v=swcR2NWlf18

https://www.eso.org/sci/facilities/develop/instruments/espresso.html



The extreme precision will be obtained by adopting and improving well-known HARPS concepts.


Fig. 2: ESPRESSO spectrograph optical design at the Preliminary Design Review.

[peter]

https://www.facebook.com/ESOAstronomy/photos/pcb.10156146411422495/10156146402017495/?type=3&theater

[peter]

http://mp.weixin.qq.com/s/g0P95L4hE-Gkmkoz4p5C4w