scholarly journals On the Link Between Rotation and Lithium in Giant stars

2000 ◽  
Vol 198 ◽  
pp. 500-501
Author(s):  
J. R. De Medeiros ◽  
J. D. Nascimento ◽  
S Sankarankutty ◽  
J. M. Costa ◽  
J. R. P. Da Silva ◽  
...  
Keyword(s):  
Spectral Type ◽  
Lithium Content ◽  
Late Type ◽  
Lithium Abundance ◽  
Root Cause ◽  
Giant Stars ◽  
Evolved Stars ◽  
Solar Type ◽  
Type Giant ◽  
The Relationship

Late-type evolved stars are well known for the decrease with age of their rotation and lithium abundance. However, the root cause of this property as well as the relationship between rotation and lithium content in these stars are not yet completely established. In the present work, we study the link between rotation and lithium abundances in solar-type giant stars on the basis of a large sample of 380 stars of spectral type F, G and K.

scholarly journals IUE Observations of the Chromospheric Activity-Age Relation in Young Solar-Type Stars

1983 ◽  
Vol 102 ◽  
pp. 161-164
Author(s):  
Theodore Simon ◽  
Ann Merchant Boesgaard
Keyword(s):  
Magnetic Fields ◽  
Flare Activity ◽  
The Sun ◽  
Late Type ◽  
Cool Star ◽  
Opportune Time ◽  
Solar Type ◽  
Age Relation ◽  
Relationship Of ◽  
The Relationship

The difficulties of measuring magnetic fields in late-type stars other than the sun are well known, as one is reminded by other contributions to these Proceedings. This Symposium nevertheless comes at a very opportune time, as we are now at the point where we can begin to explore the relationship of stellar magnetism to flare activity and quiescent cool star chromospheres, transition regions (TRs), and coronae.

Magnesium emission variability among late-type giant stars

1982 ◽  
Vol 253 ◽  
pp. 716 ◽  
Author(s):  
D. J. Mullan ◽  
R. E. Stencel
Keyword(s):  
Late Type ◽  
Giant Stars ◽  
Type Giant

scholarly journals Stellar activity

1986 ◽  
Vol 118 ◽  
pp. 283-283
Author(s):  
D. K. Duncan
Keyword(s):  
Sunspot Cycle ◽  
Late Type ◽  
Stellar Activity ◽  
Giant Stars ◽  
Rotation Periods ◽  
Type Giant

We have been monitoring the CaII H and K emission in late-type giant stars using the Mt Wilson 60-inch telescope. It is a continuation of work that Olin Wilson began almost 20 years ago. As a result not only have starspot cycles been detected (equivalent to the solar sunspot cycle), but rotation periods have now been measured.

Luminosity and Temperature from Near-Infrared Spectra of Late-Type Giant Stars

1997 ◽  
Vol 113 ◽  
pp. 1411 ◽  
Author(s):  
S. V. Ramirez ◽  
D. L. Depoy ◽  
Jay A. Frogel ◽  
K. Sellgren ◽  
R. D. Blum
Keyword(s):  
Infrared Spectra ◽  
Near Infrared ◽  
Late Type ◽  
Giant Stars ◽  
Near Infrared Spectra ◽  
Type Giant

scholarly journals Acoustic wave driven mass loss in late-type giant stars

1987 ◽  
Vol 122 ◽  
pp. 325-326 ◽  
Author(s):  
M. Cuntz ◽  
L. Hartmann ◽  
P. Ulmschneider
Keyword(s):  
Acoustic Wave ◽  
Mass Loss ◽  
Wave Field ◽  
Wave Energy ◽  
Acoustic Waves ◽  
Late Type ◽  
Large Wave ◽  
Giant Stars ◽  
Wave Energy Flux ◽  
Type Giant

Mass loss generated by radiatively damped acoustic waves is investigated. We find that a persistent wave energy flux leads to extended chromospheres. Mass loss is quite likely produced if the wave field retains a transient character and if large wave periods are used.

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