Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...520l.135f&link_type=abstract
The Astrophysical Journal, Volume 520, Issue 2, pp. L135-L138.
Astronomy and Astrophysics
Astronomy
69
Sun: Chromosphere, Sun: Corona, Sun: Transition Region
Scientific paper
Recent observations of solar active regions with the Transition Region and Coronal Explorer (TRACE) have revealed finely textured, low-lying EUV emission, called the ``moss,'' appearing as a bright dynamic pattern with dark inclusions. The moss has been interpreted as the upper transition region by Berger and coworkers. In this study we use SOHO Coronal Diagnostic Spectrometer and TRACE observations of Active Region 8227 on 1998 May 30 to determine the physical parameters of the moss material. We establish that the plasma responsible for the moss emission has a temperature range of (0.6-1.5)x10^6 K and is associated with hot loops (T>2x10^6 K). Moss plasma has an electron density of (2-5)x10^9 cm^-3 at a temperature of 1.3x10^6 K, giving a pressure of 0.7-1.7 dynes cm^-2 (a few times higher than in coronal loops observed in the TRACE Fe IX/X lambda171 passband). The volume filling factor of the moss plasma is of order 0.1, and the path along which the emission originates is of order 1000 km long.
de Pontieu Bart
Fletcher Lyndsay
No associations
LandOfFree
Plasma Diagnostics of Transition Region ``Moss'' using SOHO/CDS and TRACE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Plasma Diagnostics of Transition Region ``Moss'' using SOHO/CDS and TRACE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plasma Diagnostics of Transition Region ``Moss'' using SOHO/CDS and TRACE will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1456257