On the Loss of Angular Momentum from Stars in the Pre-Main Sequence Phase
نویسندگان
چکیده
منابع مشابه
Loss of angular momentum of magnetic Ap stars in the pre-main sequence phase
A model for rotation evolution of an intermediate mass star with the primordial magnetic field in the pre-main sequence (PMS) phase was developed. It takes into account the accretion of matter along the magnetic field lines, the stellar field-disk interaction and a magnetized wind. Variations of stellar moment of inertia were included based on evolutionary models of PMS evolution of such stars....
متن کاملThe influence of the magnetic field orientation on the angular momentum loss in the pre-main sequence phase: the case of very slowly rotating magnetic Ap stars
Landstreet & Mathys (2000) have discovered that almost all the magnetic Ap stars having rotation periods longer than about one month have their magnetic and rotation axes fairly closely aligned, in contrast to the more common magnetic Ap stars of shorter period, in which the two axes are usually inclined to one another at a large angle. Furthermore, as shown earlier by Mathys et al. (1997) and ...
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Projected rotational velocities (vsini) have been measured for a sample of 145 stars with masses between 0.4 and >10 M⊙ (median mass 2.1 M⊙) located in the Orion star-forming complex. These measurements have been supplemented with data from the literature for Orion stars with masses as low as 0.1 M⊙. The primary finding from analysis of these data is that the upper envelope of the observed valu...
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The angular momentum evolution of cool stars during the pre-main sequence phase of stellar evolution remains a major outstanding problem. Multiple processes are likely involved in the transfer of mass and angular momentum within and out of the star+disk system. The role of coronal mass ejections (CMEs), energetic events which shed mass and magnetic flux in the Sun, has yet to be fully explored ...
متن کاملA 10 M Test of Disk-regulated Angular Momentum among Low-mass Pre-main-sequence Stars
We summarize the results of our recent work testing the hypothesis of disk-regulated angular momentum among low-mass PMS stars. Contrary to some previous studies, we nd no connection between slow stellar rotation and the presence of near-IR signatures of disks among young (1 Myr) low-mass stars in Orion. We use 10 m photometry to test for the presence of inner-truncated disks among PMS stars la...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1970
ISSN: 0252-9211
DOI: 10.1017/s025292110002707x