000006326 001__ 6326
000006326 005__ 20230201162859.0
000006326 037__ $$aCTALK-2023-0060
000006326 100__ $$aBerghmans, D.
000006326 245__ $$aFirst Perihelion of EUI
000006326 260__ $$c2022
000006326 269__ $$c2022-09-12
000006326 520__ $$aThe Extreme Ultraviolet Imager (EUI), onboard Solar Orbiter, consists of 3 telescopes, the Full Sun Imager (FSI) and the High Resolution Imagers in EUV (HRIEUV) and in Lyman- alpha (HRILYA). Solar Orbiter/EUI started its Nominal Mission on 2021 November 27. EUI is imaging from the largest scales in the extended corona off limb, down to the smallest features at the base of the corona and chromosphere. EUI is therefore a cornerstone instrument for the connection science that is at the heart of the Solar Orbiter science goals. The highest spatial resolution of EUI is achieved when Solar Orbiter passes through the perihelion of its orbit. On 2022 March 26, Solar Orbiter reached for the first time a distance to the Sun of only 0.323 au. No other coronal EUV imager but EUI came ever this close to the Sun. In this paper, we review the obtained EUI data sets during the period 2022 March-April, when Solar Orbiter quickly moved from alignment with the Earth (2022 March 6), to perihelion (2022 March 26), to quadrature with the Earth (2022 March 29). We will highlight the first observational results in these unique data-sets and we report on the in-flight instrument performance. EUI has achieved the highest resolution images ever of the solar corona in the quiet Sun and polar coronal holes. Several active regions were imaged at unprecedented cadences and sequence durations. We identified in this paper a broad range of features that require deeper studies. For each telescope we report also pending performance issues. We conclude with an invitation to participate in the EUI research by make use of the EUI open data policy and the EUI Guest Investigator Program.
000006326 594__ $$aNO
000006326 6531_ $$aSolar Orbiter
000006326 6531_ $$aEUI
000006326 700__ $$aAntolin, P.
000006326 700__ $$aAuchère, F.
000006326 700__ $$aBarczynski, K.
000006326 700__ $$aAznar Cuadrado, R.
000006326 700__ $$aChitta, L. P.
000006326 700__ $$aGissot, S.
000006326 700__ $$aHarra, L.
000006326 700__ $$aJanvier, J.
000006326 700__ $$aKraaikamp, E.
000006326 700__ $$aLong, L.
000006326 700__ $$aMierla, M.
000006326 700__ $$aParenti, S.
000006326 700__ $$aRodriguez, L.
000006326 700__ $$aSchühle, U.
000006326 700__ $$aStegen, K.
000006326 700__ $$aVerbeeck, F.
000006326 700__ $$aZhukov, A.
000006326 700__ $$aEUIteam, X.
000006326 773__ $$tSolar Orbiter 8, Belfast (UK)
000006326 8560_ $$fdavid.berghmans@observatoire.be
000006326 85642 $$ahttps://blogs.qub.ac.uk/so8belfast/programme/
000006326 906__ $$aContributed
000006326 980__ $$aCTALKCONT