2002A&A...393L..77R


Query : 2002A&A...393L..77R

2002A&A...393L..77R - Astronomy and Astrophysics, volume 393L77-80 (2002/10-3)

Evidence for strong differential rotation in Li-depleted fast rotating F-stars.

REINERS A. and SCHMITT J.H.M.M.

Abstract (from CDS):

We report the detection of strong differential rotation on ten fast rotating (vsini>10km/s) stars of spectral types F0-G0 using the Fourier Transform Method, in three cases we find α> 20%. Among the six differential rotators with vsini>15km/s, five have Li abundances of logε(Li)<1.5, for one object no Li abundance is available to our knowledge. No differentially rotating star with high Li abundance was found, although the average Li abundance of fast rotators in the literature is logε(Li)>2.0. Our results suggest that Li-depleted fast rotators tend to show differential rotation. Interpreting high rotational velocity as indicator of youth, this finding supports the idea of the connection between mixing processes and differential rotation during magnetic breaking in F-stars.

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Journal keyword(s): stars: abundances - stars: evolution - stars: rotation

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 * tau06 Eri PM* 03 46 50.8873186498 -23 14 59.002090709   4.65 4.20     F5IV-V 206 0
2 HD 89569 PM* 10 18 37.9085291952 -56 06 37.417005216   6.29 5.80     F6V 70 0
3 * 40 Leo dS* 10 19 44.1672125464 +19 28 15.285966538   5.24   4.5   F6IV-V 288 0
4 * 89 Leo PM* 11 34 21.9489030480 +03 03 36.593787600   6.23   5.5   F5.5V 173 0
5 * alf Crv PM* 12 08 24.8172764085 -24 43 43.952148016   4.33 4.01     F1V 202 0
6 * tau Boo PM* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 1049 1
7 * eta Boo SB* 13 54 41.07892 +18 23 51.7946 3.440 3.250 2.680 2.24 1.95 G0IV 733 0
8 * iot Vir PM* 14 16 00.8682760805 -06 00 01.969483331 4.64 4.60 4.08     F7III 372 0
9 * 58 Oph PM* 17 43 25.7935382141 -21 40 59.498912759   5.313 4.861     F5V 160 0
10 * 110 Her PM* 18 45 39.7256792847 +20 32 46.713086264 4.66 4.65 4.19 3.80 3.54 F5.5IV-V 427 0
11 HD 175317 PM* 18 55 31.0053872592 -16 22 35.888206980   5.985 5.546     F5V 122 0
12 * psi Cap PM* 20 46 05.7329952443 -25 16 15.233491015   4.538 4.122     F5V 230 0

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