First observations of stellar coronal structure - The coronae of AR Lacertae

Details First observations of stellar coronal structure - The coronae of AR Lacertae First observations of stellar coronal structure - The coronae of AR Lacertae

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...267..665w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 267, April 15, 1983, p. 665-681.

Astronomy and Astrophysics

Astronomy

106

Coronal Loops, Eclipsing Binary Stars, Flare Stars, Radio Sources (Astronomy), Stellar Coronas, X Ray Sources, Chromosphere, Heao 2, Light Curve, Magnetic Flux, Stellar Luminosity, Stellar Magnetic Fields, Stellar Spectra, Stellar Structure, Subgiant Stars, Ultraviolet Spectra

Scientific paper

In connection with the present investigation, X-ray, radio, and ultraviolet observations of AR Lacertae over one orbital cycle have been obtained. The X-ray light curve shows a deep primary minimum and a broad, shallow secondary minimum. The quiescent corona of the G2 IV component is small and asymmetric. This corona extends some 0.02 stellar radii above the photosphere; the leading, spotted hemisphere is brighter in X-rays than the trailing hemisphere. The K0 IV component has two coronal components. The extended, presumably hotter component extends to one stellar radius above the photosphere and exhibits a brighter leading hemisphere. There is an inner coronal component which is small relative to the stellar radius, but the lack of coverage past mid-eclipse severely limits the possibility to deduce the nature of this component. The UV observations also imply a nonuniform surface distribution of plage regions.

Affiliated with

Also associated with

No associations

Rating

First observations of stellar coronal structure - The coronae of AR Lacertae 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 First observations of stellar coronal structure - The coronae of AR Lacertae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First observations of stellar coronal structure - The coronae of AR Lacertae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1233731