Starspot-induced optical and infrared radial velocity variability in T Tauri star Hubble 4

Abstract

We report optical (6150 Ang) and K-band (2.3 micron) radial velocities obtained over two years for the pre-main sequence weak-lined T Tauri star Hubble I 4. We detect periodic and near-sinusoidal radial velocity variations at both wavelengths, with a semi-amplitude of 1395\pm94 m/s in the optical and 365\pm80 m/s in the infrared. The lower velocity amplitude at the longer wavelength, combined with bisector analysis and spot modeling, indicates that there are large, cool spots on the stellar surface that are causing the radial velocity modulation. The radial velocities maintain phase coherence over hundreds of days suggesting that the starspots are long-lived. This is one of the first active stars where the spot-induced velocity modulation has been resolved in the infrared.

Accepted for publication in The Astrophysical Journal

References in corpus (13)

• The Magnetic Fields of Classical T Tauri Stars
• Mapping the Shores of the Brown Dwarf Desert II: Multiple Star Formation in Taurus-Auriga
• TW Hydrae: evidence of stellar spots instead of a Hot Jupiter
• Search for exoplanets with the radial-velocity technique: quantitative diagnostics of stellar activity
• New periodic variable stars coincident with ROSAT sources discovered using SuperWASP
• Non-stationary dynamo & magnetospheric accretion processes of the classical T Tauri star V2129 Oph
• The Luminosity and Mass Functions of Low-Mass Stars in the Galactic Disk: I. The Calibration Region
• Differential Radial Velocities and Stellar Parameters of Nearby Young Stars
• A Young Planet Search in Visible and IR Light: DN Tau, V836 Tau, and V827 Tau
• A multiwavelength radial velocity search for planets around the brown dwarf LP 944-20
• The Jupiter Twin HD 154345b
• Star Spot Induced Radial Velocity Variability in LkCa 19
• Periodic radial velocity variations in RU Lupi

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