Diagnostics of a flare on EQ Peg B from optical pulsations

Details Diagnostics of a flare on EQ Peg B from optical pulsations Diagnostics of a flare on EQ Peg B from optical pulsations

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011astl...37...49t&link_type=abstract

Astronomy Letters, Volume 37, Issue 1, pp.49-54

Astronomy and Astrophysics

Astronomy

1

Flare Stars, Solar-Stellar Analogies, Coronal Loops, Optical Oscillations

Scientific paper

Based on the methods of coronal seismology, we have investigated the ten-second quasi-periodic pulsations of the optical flare emission from the active red dwarf EQ Peg B detected with the William Herschel Telescope on La Palma. We propose and analyze a model in which they could be produced by sausage oscillations of a coronal flare loop. The amplitude and phase relations between the displacement components of the radial oscillations and the conditions for their excitation in loops with footpoints frozen into the photosphere are considered. The temperature (≈6 × 107 K), plasma density (≈2.7 × 1011 cm-3), and magnetic field strength (≈540 G) in the region of energy release have been determined. Our estimate of the flare loop length (≈0.4 R ⋆) provides evidence for the existence of extended coronae on red dwarf stars.

Affiliated with

Also associated with

No associations

Rating

Diagnostics of a flare on EQ Peg B from optical pulsations 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 Diagnostics of a flare on EQ Peg B from optical pulsations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diagnostics of a flare on EQ Peg B from optical pulsations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1586924