J/A+A/363/239 Lithium abundances in single giant stars (De Medeiros+, 2000)
Rotation and lithium in single giant stars.
De Medeiros J.R., do Nascimento J.D.Jr, Sankarankutty S., Costa J.M.,
Maia M.R.G.
<Astron. Astrophys. 363, 239 (2000)>
=2000A&A...363..239D 2000A&A...363..239D
ADC_Keywords: Stars, giant ; Abundances, peculiar ; Rotational velocities
Keywords: stars: abundances - stars: evolution - stars: late-type -
stars: rotation
Abstract:
In the present work, we study the link between rotation and lithium
abundance in giant stars of luminosity class III, on the basis of a
large sample of 309 single stars of spectral type F, G and K. We have
found a trend for a link between the discontinuity in rotation
at the spectral type G0III and the behavior of lithium abundances
around the same spectral type. The present work also shows that
giant stars presenting the highest lithium contents, typically stars
earlier than G0III, are those with the highest rotation rates,
pointing for a dependence of lithium content on rotation, as observed
for other luminosity classes. Giant stars later than G0III
present, as a rule, the lowest rotation rates and lithium contents. A
large spread of about five magnitudes in lithium abundance is
observed for the slow rotators. Finally, single giant stars with
masses 1.5<M/M☉≤2.5 w a clearest trend for a correlation
between rotational velocity and lithium abundance.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 41 309 Physical parameters for the programme stars
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD (Cat. III/135) number
8- 21 A14 --- SpType Spectral type
23- 26 F4.2 mag B-V B-V colour index
28- 31 F4.1 km/s vsini Rotational velocity
33 A1 --- l_Li Limit flag on Li
34- 38 F5.2 --- Li Li abundance
40 A1 --- r_Li Reference (1)
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Note (1): References:
a: Balachandran (1990, ApJ 93, 235) 1990ApJ...354..310B 1990ApJ...354..310B ???
b: Wallerstein et al. (1994AJ....107.2211W 1994AJ....107.2211W)
c: Brown et al. (1989ApJS...71..293B 1989ApJS...71..293B)
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 31-Jan-2001