Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100.1452c&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Nov. 1988, p. 1452-1460.
Astronomy and Astrophysics
Astronomy
6
Chromosphere, Dwarf Stars, Late Stars, Line Spectra, Stellar Spectra, H Alpha Line, Helium, M Stars, Sun, Variable Stars
Scientific paper
The results of a high-resolution spectroscopic synoptic program of observations of key chromospheric diagnostics in a sample of dwarf stars are reported. Low-level variability in the strength of the chromospheric H-alpha absorption line is found. The nature of the variability implies that the operative chromospheric heating mechanism is partially characterized by a transient component. This fact, combined with the detectability of the low-level variability, suggests that magnetic field-related, nonradiative atmospheric heating is widespread in the dM stars. High-amplitude variability in the H-alpha emission strength of the active dMe star BY Dra was also observed. Synoptic observations of the He I 5876 A absorption line in three solar-type stars revealed low-level variability in the strength of this feature.
Cutispoto Giuseppe
Giampapa Mark S.
No associations
LandOfFree
Variability of chromospheric lines in late-type dwarf stars 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 Variability of chromospheric lines in late-type dwarf stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variability of chromospheric lines in late-type dwarf stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1827650