INVESTIGADORES
MANDRINI Cristina Hemilse
congresos y reuniones científicas
Título:
On the origin of loops with transition region temperatures
Autor/es:
MANDRINI, C.H.; HARRA, L.K.; MATTHEWS, S.A.
Lugar:
San Juan, Argentina
Reunión:
Congreso; 47 Reunión de la Asociación Argentina de Astronomía; 2004
Institución organizadora:
Asociación Argentina de Astronomía
Resumen:
Very dynamic loops at transition region temperatures have been observed at coronal heights since more than 30 years. The origin of these loops is still debated and several explanations have been put forward. It has been proposed that the loops are merely cooling from hotter coronal loops, that they are produced from siphon flows, or that they are loops heated only to transition region temperatures. In this work we combine SOHO/MDI (Michelson-Doppler Imager), SOHO/CDS (Coronal Diagnostic Spectrometer) and Yohkoh/SXT (Soft X-ray Telescope) observations to determine whether the appearance of transition region loops is related to small-scale flaring in the corona, and to compute the magnetic configuration of the loops. The latter allows us to determine the direction of plasma flows in the loops. In our analyzed examples the appearance of the transition region loops is often related to small flares and, consequently, the plasma flows from the loop top to the footpoints as it cools down.
