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The Astrophysical Journal
Article . 1993 . Peer-reviewed
Data sources: Crossref
https://dx.doi.org/10.1086/172...
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The distant future of solar activity: A case study of Beta Hydri. II - Chromospheric activity and variability

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1993 English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 403, page 396 (issn: 0004-637X, eissn: 1538-4357, Copyright policy )
Authors: D. Dravins; P. Linde; K. Fredga; G. F. Gahm;

doi: 10.1086/172211

The distant future of solar activity: A case study of Beta Hydri. II - Chromospheric activity and variability

Abstract

The secular evolution of solar-type chromospheres is studied through a detailed comparison of the present Sun (G2 V) with the very old (≃9.5 Gyr) star β Hyi (G2 IV). In such old stars one might observe the lowest possible levels of stellar activity. Detailed studies of various atmospheric layers in β Hyi have been made, and this Paper II in the series treats chromospheric features and their time variability. High-resolution Ca II H and K profiles show the emission about half that for the Sun, but with the same sense of violet-red asymmetry (the shortward peak the strongest)

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    selected citations
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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 17
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    		 Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
17
Top 10%
Top 10%
Average
gold
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