Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..103w&link_type=abstract
In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 103-10
Astronomy and Astrophysics
Astrophysics
7
Dwarf Stars, F Stars, Iue, Stellar Activity, Stellar Spectra, Ultraviolet Spectra, Emission Spectra, Stellar Color, Stellar Rotation
Scientific paper
Deep low dispersion, short wavelength IUE observations of 69 F dwarfs were studied by overexposing the long wavelength end of the SWP camera by up to 100 times in order to bring up the weak chromospheric and transition region (TR) emission lines. All but one of the stars observed shows evidence for stellar activity, as defined by the presence of large C II and C IV surface fluxes, with fluxes greater than 100,000 ergs/sqcm/sec. There is no correlation between surface flux and the stellar rotation rate in the early F dwarfs. The TR surface fluxes increase systematically with decreasing B-V color, with no evidence for any decrease in the activity as the convection zones become very small. It is argued that there is a fundamental difference in the atmospheric heating mechanisms between early F dwarfs and solar-like stars. The heating of the TR in the early F dwarfs may be dominated by acoustic heating.
Linsky Jeffrey L.
Walter Fred M.
No associations
LandOfFree
Activity in warm stars: IUE observations of early F dwarfs 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 Activity in warm stars: IUE observations of early F dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Activity in warm stars: IUE observations of early F dwarfs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1294677