Rotation Effects in Classical T Tauri Stars

Abstract

Surface temperature inhomogeneities in classical T Tauri stars (CTTS) induced by magnetic activity and mass accretion lead to rotational modulation of both photometric and spectroscopic parameters of these stars. Using the extended photometric catalogue by Grankin et al. (2007), we have derived the periods and amplitudes of the rotational modulation of brightness and color for 31 CTTS; for six of them, the periods have been revealed for the first time. The inclinations of the rotation axis and equatorial rotational velocities of CTTS have been determined. We show that the known periods of brightness variations for some of the CTTS are not the axial rotation periods but are the Keplerian periods near the inner boundary of the dusty disk. We have found that the angular velocity of CTTS with a mass of 0.3 - 3 M_sun in the Taurus-Auriga complex remains constant in the age range 1 - 10 Myr. CTTS on radiative evolutionary tracks rotate faster than completely convective CTTS. The specific angular momentum of CTTS depends on the absolute luminosity in the Hα- line.

12 pages, 4 figures

References in corpus (6)

• The Magnetic Fields of Classical T Tauri Stars
• The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST)
• Magnetospheric accretion on the T Tauri star BP Tauri
• Results of the ROTOR-program. I. The long-term photometric variability of classical T Tauri stars
• Results of the ROTOR-program. II. The long-term photometric variability of weak-line T Tauri stars
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• Rotation of Low-Mass Stars in Taurus with K2
• The VLTI / PIONIER near-infrared interferometric survey of southern T Tauri stars. I. First results
• Accretion discs as regulators of stellar angular momentum evolution in the ONC and Taurus-Auriga
• Long-term variability of T Tauri stars using WASP
• The magnetic obliquity of accreting T Tauri stars
• The dipper population of Taurus seen with K2
• Line and continuum radiative transfer modelling of AA Tau
• Stable accretion and episodic outflows in the young transition disk system GM Aurigae
• Is T Tauri North a 'Classical' T Tauri star?
• Near-infrared time-series photometry in the field of Cygnus OB2 association II. Mapping the variability of candidate members
• Density streams in the disc winds of Classical T Tauri stars