Observations of the radial velocity of the Sun as measured with the novel SONG spectrograph: results from a 1-week campaign

Eclipse on the Coral Sea: Cycle 24 Ascending

物理学;天文学

Pallé, P.L.^1,2 ; Grundahl, F.^3 ; Hage, A. Triviño^1,2 ; Christensen-Dalsgaard, J.^3 ; Frandsen, S.^3 ; García, R.A.^4 ; Uytterhoeven, K.^1,2 ; Andersen, M.F.^3 ; Rasmussen, P.K.^5 ; Sørensen, A.N.^5 ; Kjeldsen, H.^3 ; Spano, P.^8 ; Nilsson, H.^7 ; Hartman, H.^7 ; Jørgensen, U.G.^5,6 ; Skottfelt, J.^5,6 ; Harpsøe, K.^5,6 ; Andersen, M.I.^5

Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain^1

Department de Astrofísica, Universidad de la Laguna, E-38206 La Laguna, Tenerife, Spain^2

Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Denmark^3

Laboratoire AIM, CEA/DSM-CNRS-Université Paris Diderot, CEA, F-91191, Gif-sur-Yvette, France^4

Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Kbenhavn Ø, 2100, Denmark^5

Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, København K, 1350, Denmark^6

Lund Observatory, Lund University, Box 43, SE-221 00 Lund, Sweden^7

INAF, Osservatorio Astronomico di Brera, Italy^8

关键词: Canary islands;    Echelle spectrograph;    Helioseismology;    Measuring precision;    Radial velocity;    Reference instruments;    Solar light;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/440/1/012051/pdf
DOI  :  10.1088/1742-6596/440/1/012051

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Deployment of the prototype node of the SONG project took place in April 2012 at Observatorio del Teide (Canary Islands). Its key instrument (echelle spectrograph) was installed and operational a few weeks later while its 1 m feeding telescope suffered a considerable delay to meet the required specifications. Using a fibre-feed, solar light could be fed to the spectrograph and we carried out a 1-week observing campaign in June 2012 to evaluate its performance for measuring precision radial velocities. In this work we present the first results of this campaign by comparing the sensitivity of the SONG spectrograph with other helioseismology reference instruments (Mark-I and GOLF) when simultaneous data are considered.