2016A&A...587A.105A


Query : 2016A&A...587A.105A

2016A&A...587A.105A - Astronomy and Astrophysics, volume 587A105-105 (2016/3-1)

Rotating models of young solar-type stars. Exploring braking laws and angular momentum transport processes.

AMARD L., PALACIOS A., CHARBONNEL C., GALLET F. and BOUVIER J.

Abstract (from CDS):

Understanding the angular momentum evolution of stars is one of the greatest challenges of modern stellar physics. We study the predicted rotational evolution of solar-type stars from the pre-main sequence to the solar age with 1D rotating evolutionary models including physical ingredients. We computed rotating evolution models of solar-type stars including an external stellar wind torque and internal transport of angular momentum following the method of Maeder and Zahn with the code STAREVOL. We explored different formalisms and prescriptions available from the literature. We tested the predictions of the models against recent rotational period data from extensive photometric surveys, lithium abundances of solar-mass stars in young clusters, and the helioseismic rotation profile of the Sun. We find a best-matching combination of prescriptions for both internal transport and surface extraction of angular momentum. This combination provides a very good fit to the observed evolution of rotational periods for solar-type stars from early evolution to the age of the Sun. Additionally, we show that fast rotators experience a stronger coupling between their radiative region and the convective envelope. Regardless of the set of prescriptions, however, we cannot simultaneously reproduce surface angular velocity and the internal profile of the Sun or the evolution of lithium abundance. We confirm the idea that additional transport mechanisms must occur in solar-type stars until they reach the age of the Sun. Whether these processes are the same as those needed to explain recent asteroseismic data in more advanced evolutionary phases is still an open question.

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Journal keyword(s): hydrodynamics - stars: magnetic field - stars: evolution - stars: pre-main sequence - stars: rotation - stars: solar-type

Simbad objects: 18

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Number of rows : 18
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 Cl Blanco 1 OpC 00 03 04.1 -29 48 55           ~ 380 0
2 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
3 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
4 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
5 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
6 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
7 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
8 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
9 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
10 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
11 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
12 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
13 NGC 3680 OpC 11 25 19.8 -43 14 38   8.40 7.6     ~ 340 0
14 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
15 IC 4651 OpC 17 24 48.5 -49 55 23           ~ 374 0
16 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0
17 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
18 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0

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