O VI and H2 Lines in Sunspots

Nicolas Alain Claude Labrosse, H. Morgan, Shadia Rifai Habbal, D. Brown

Research output: Chapter in Book/Report/Conference proceedingConference Proceeding (Non-Journal item)


Sunspots are locations on the Sun where unique atmospheric conditions prevail. In particular, the very low temperatures found above sunspots allow the emission of H2 lines. In this study we are interested in the radiation emitted by sunspots in the O VI lines at 1031.96 Å and 1037.60 Å. We use SOHO/SUMER observations of a sunspot performed in March 1999 and investigate the interaction between the O VI lines and a H2 line at 1031.87 Å found in the Werner band. The unique features of sunspots atmospheres may very well have important implications regarding the illumination of coronal O+5 ions in the low corona, affecting our interpretation of Doppler dimming diagnostics.
Original languageEnglish
Title of host publicationThe Physics of Chromospheric Plasmas ASP Conference Series
Subtitle of host publicationProceedings of the conference held 9-13 October, 2006 at the University of Coimbra in Coimbra, Portugal
EditorsP. Heinzel, I. Dorotovič, R. J. Rutten
Publication statusPublished - 01 May 2007
EventThe Physics of Chromospheric Plasmas ASP Conference - Coimbra , Portugal
Duration: 09 Oct 200613 Oct 2006


ConferenceThe Physics of Chromospheric Plasmas ASP Conference
Period09 Oct 200613 Oct 2006


Dive into the research topics of 'O VI and H2 Lines in Sunspots'. Together they form a unique fingerprint.

Cite this