Chromospheric variability in late-type dwarfs from high-resolution spectra of CA II H

Bibcode
1990Ap&SS.170..109G
DOI
10.1007/BF00652654
Garcia Lopez, R. J.; Rebolo, R.; Beckman, J. E.; Crivellari, L.
Bibliographical reference

(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640X), vol. 170, no. 1-2, Aug. 1990, p. 109-111.

Advertised on:
8
1990
Number of authors
4
IAC number of authors
0
Citations
3
Refereed citations
1
Description
An analysis is presented of high-resolution high SNR spectra of late-type chromospherically active dwarfs in Ca II H. Observational parameters employed are the total emission flux attributable to the chromosphere, the asymmetry of the emission component and its bisector, the ratio of the intensities of the blue and red H2 emission peaks, and the absolute wavelengths of the H3 minimum and the mean emission feature. Given time-spaced sets of spectra for each object, which are as yet relatively sparse, the potential use of these observational parameters to deepen understanding of the chromospheric activity is explored.
Type
Non-refereed
Variable stars

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